Cisco CCNA 4 Exam(1~6) (Answers)

时间:2007-11-12 00:57:08   来源:  作者:  点击:次  出处:技术无忧
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Cisco CCNA 4 Exam(1~6) (Answers)Notes:ONLY FOR STUDY!!
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Cisco CCNA 4 Exam 1 answer
 
1 What is the default number of pings issued by a DHCP server to a pool address before sending the DHCPOFFER to a client?
one
* two
three
four
five
 
2 Refer to the graphic. Which command would allow the router to forward DHCP broadcasts from Host A to the DHCP server?
* ip helper-address
dhcp helper-address
dhcp relay-agent
dhcp-relay
 
3 Which of the following traffic types are supported by Cisco IOS NAT? (Choose two.)
Routing table updates
* ICMP
* FTP
BOOTP
SNMP
 
4 Users are complaining that they cannot attach to network resources. A technician has confirmed that clients are not properly receiving IP configuration information through the DHCP process. The network administrator wants to watch the DHCP process while the technician tries to release and renew addresses on the clients. Which command would the network administrator use to monitor the process of address allocation?
show ip dhcp server statistics
show ip dhcp binding
* debug ip dhcp server events
debug ip dhcp binding
 
5 Given the accompanying graphic, which command would establish a group of 32 IP addresses that could be used to hide inside addresses from the Internet?
ip nat pool Raleigh 10.0.0.32 10.0.0.63 netmask 255.255.255.224
ip nat pool Raleigh 10.0.0.32 10.0.0.63 netmask 255.255.255.240
* ip nat pool Raleigh 171.11.10.32 171.11.10.63 netmask 255.255.255.224
ip nat pool Raleigh 171.11.10.32 171.11.10.63 netmask 255.255.255.240
 
6 Given the accompanying diagram, which commands are necessary to implement PAT on the Raleigh router? (Choose four.)
*access-list 10 permit 192.168.10.0 0.0.0.255
access-list 10 permit 171.11.0.0 0.0.255.255
ip nat inside source static 192.168.10.1 171.11.0.0
*ip nat inside source list 10 interface S0 overload
*ip nat outside
*ip nat inside
 
7 A company was issued 207.48.12.8/29 as its registered address from its ISP. Which of the following is a solution that will allow Internet access to 300 employees simultaneously?
VLSM to further subnet the registered address and create more IP addresses
normal subnetting on the Class C network and address the host
*RFC 1918 and port address translation
this is an impossible scenario because there are not enough addresses
 
8 The Raleigh router shown in the diagram is configured with PAT. Which of the following must be changed if the private network is migrated to a 10.0.0.0 network? (Choose two.)
*E0 interface address
S0 interface address
*the access-list statement
the NAT outside interface
the NAT inside interface
 
9 What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco 806 broadband router?
defines which addresses are allowed out of the router
defines which addresses are allowed into the router
* defines which addresses can be translated
defines which addresses are assigned to a NAT pool
 
10 Which configuration parameters are provided by the dynamic allocation process of DHCP? (Choose three.)
* Gateway address
* DNS server
DHCP Server
* Subnet mask
Key server
ARP server
 
11 What is the purpose of the DHCPDECLINE message?
If the DHCP client received multiple DHCPOFFERs, it uses the DHCPDECLINE to refuse the offers it does not use.
If the DHCP server sends an IP configuration update that the DHCP client does not need, it uses the DHCPDECLINE to refuse the information.
The DHCP server uses the DHCPDECLINE message to refuse a DHCP client's request for IP configuration information.
* If the DHCP client detects that the address supplied by the DHCP server is in use on the network, it uses the DHCPDECLINE to refuse the offer.
 
12 Given the accompanying graphic, which statement would be applied to the S0 interface when configuring NAT on the Tampa router?
ip nat inside
* ip nat outside
ip pat inside
ip pat outside
 
13 What is true regarding the differences between NAT and PAT?
PAT uses the word "overload" at the end of the access-list statement to share a single registered address.
Static NAT allows an unregistered address to map to multiple registered addresses.
Dynamic NAT allows hosts to receive the same global address each time external access is required.
* PAT uses unique source port numbers to distinguish between translations.
 
14 What is the default lease time for addresses assigned to clients through Easy IP?
* twenty-four hours
forty-eight hours
one week
two weeks
 
15 Which of the following are broadcasts sent by a client to a DHCP server? (Choose two.)
* DHCPDISCOVER
DHCPRELEASE
DHCPACK
* DHCPREQUEST
DHCPOFFER
 
16 Given the accompanying graphic, which addresses could be assigned to traffic leaving S0 as a result of the statement ip nat pool Tampa 179.9.8.96 179.9.8.111 netmask 255.255.255.240? (Choose two.)
10.0.0.125
179.9.8.95
* 179.9.8.98
* 179.9.8.101
179.9.8.112
 
17 Which configuration information might a DHCPOFFER include? (Choose three.)
* IP address
* DNS server address
DHCP binding
* Lease time
DHCP database
 
18 Which of the following can be done to allow the users on the 10.0.0.0 network to communicate with the Web Server shown in the graphic? (Choose two.)
 
* Configure the Miami router to use NAT.
Configure the Web Server with a private address.
* Configure the Miami router to use PAT.
Change the Internet link IP address of 128.56.0.0 to a private address.
Configure the Tampa router to use PAT.
 
19 A network administrator needs to configure a router to offer DHCP services. Assuming the router is operating with factory defaults and the IOS supports DHCP, what must be done to start the DHCP service?
Use the global configuration command service dhcp.
Use the privileged command service dhcp start.
Use the start service dhcp command during the setup processes.
* Do nothing. The DHCP service is enabled by default during start up.
 
20 Given the accompanying debug output from a Cisco router, what kind of address is 10.10.10.3 with the IP identification number of 29855?
* inside local
inside global
outside local
outside global
 
21 In addition to assigning addresses from predefined pools, which other services can a DHCP server offer? (Choose three.)
*DNS server addresses
*domain names
global IP assignments
NAT translations
*WINS server addresses

Cisco CCNA 4 Exam 2 answer
Cisco CCNA 4 Exam 2 answer
 
1 Which statement is true regarding WAN technologies?
Most WANS use only one technology throughout the infrastructure such as ISDN, Frame Relay or ATM.
Data transfer speeds on the WAN are typically faster than the speeds on a LAN.
*WANs operate at the lower three layers of the OSI model.
WANs are unable to support the transfer of voice or video traffic.
 
2 Which of the following are disadvantages of circuit-switched networks? (Choose two.)
Data is subject to unpredictable delays while it waits for other subscribers to transmit data.
* The connection capacity is used inefficiently due to irregular traffic bursts.
Data delivery is less reliable because only connectionless delivery methods are used.
* Circuit-switched networks are more expensive for data traffic.
Circuit-switched networks are less expensive for 24/7 data traffic.
 
3 A company requires a WAN connection that will carry 64 kbps and allow fast call setup time. The connection does not need to carry video. What is the best choice for this company?
ATM
ISDN BRI
X.25
* analog dialup
 
4 Which of the following is commonly used as Data Terminal Equipment?
ISDN
* modem
router
CSU/DSU
 
5 Why is it important to identify the type of traffic that will be carried on the WAN links before choosing a WAN technology?
to determine the routing protocol to be used on the WAN link
to determine the WAN topology
* to determine the requirements for latency and jitter
to determine the type of signaling protocol to be used on the WAN link
 
6 On which of the following are most Layer 2 WAN encapsulations based?
IP
PPP
* HDLC
SLIP
HSSI
CSU
 
7 Which term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider?
CPE
CO
* local loop
DCE
DTE
 
8 A European company needs a low cost, dialup WAN connection to validate transactions for point-of-sale card readers. Which connection type is commonly used for this situation?
ATM
* X.25
Frame Relay
Leased lines
 
9 Which of the following describes a packet-switched network using connection-oriented data transfer? (Choose two.)
* Each packet carries an identifier.
Each packet carries full addressing information.
Each switch in the route must evaluate the addressing information to determine where to send the packet.
* Each switch determines where to send the packet by examining tables in memory.
The addressing information is used to set switches along the route of data transfer to create a continuous copper circuit.
 
10 A large company already has a T1 leased line but this connection is inadequate at peak business hours. Furthermore, they would like a backup WAN connection in case their leased line temporarily fails. What type of WAN connection is commonly used in this situation?
X.25
DSL
* ISDN
cable modem
56 kbps
 
11 Depending on the company size and geographical layout, there might be many end points on the company WAN. Why is it important to identify all the end points of the WAN before choosing a WAN design?
to determine the routing protocol to be used on the WAN link
* to determine the WAN topology
to determine the requirements for latency and jitter
to determine the signaling protocol to be used on the WAN link
 
12 A new international company needs to have a design for WAN connectivity. The company will have at least five offices in every state in the United States and Mexico. Some states will have as many as 20 offices. The branch offices will require constant contact with the services of the main office. Which design model is best for WAN connectivity in this situation?
a mesh network of all branch WANs
a simple star topology connecting all branch LANs to a central router with multiple interfaces
a one layer design using Frame Relay links between LANs
* a three layer hierarchical topology interconnecting branch LANs within an area, the area LANs within a region, and connecting the regions to form the core of the WAN
 
13 Which statements are correct regarding ATM connections? (Choose two.)
uses only PVCs
* is useful for video transfers
* has data rates beyond 155 Mbps
cells have 32 byte payload and a 5 byte overhead
mandates single virtual circuits on a single leased line connection
 
14 Which of the following is true of WANs?
Shared network WAN technologies such as Frame Relay and ATM are more expensive but offer less latency and jitter than dedicated lines.
ISDN is suitable for large enterprises.
* The more network devices that data has to pass through across the WAN, the more latency and less reliability the network will experience.
WANs typically incorporate only one technology such as ISDN, Frame Relay, or ATM.
 
15 Which of the following connections will provide the equivalent of a T1/E1 connection and is intended for large businesses?
BRI
* PRI
DLCI
PSTN
POTS
 
16 A company only requires a WAN connection to transfer sales data from individual stores to the home office. All transfers will occur after business hours. They estimate they will never need a connection faster than 56 kbps. Which type of connection is best for this company?
ATM
ISDN
* analog dialup
T1 Leased Line
 
17 Which of the statements regarding DSL are correct? (Choose three.)
DSL provides a consistent bandwidth of 2.154 Mbps.
DSL connections provide a fast dialup to establish a WAN connection.
* DSL connects the local loop to a digital subscriber line access multiplexer.
* DSL bandwidth varies and can exceed the bandwidth of a T1/E1 leased line.
* For DSL to function properly, the local loop must be less than 5.5 kilometers (3.5 miles).
DSL is a popular choice for enterprises that need to connect home users to the local network due to strong security.

Cisco CCNA 4 Exam 3 answer
Cisco CCNA 4 Exam 3 answer
 
1 Which of the following describe functions of the Point-to-Point protocol with regards to the OSI model? (Choose three.)
PPP uses Layer 3 of the OSI model to establish and maintain a session between devices.
PPP operates at all layers of the OSI model.
*PPP uses the data link layer to configure such options as error detection and compression. ¡Ì
*PPP provides a mechanism to multiplex several network layer protocols. ¡Ì
PPP uses Network Control Protocols (NCP) to test and maintain connectivity between devices.
*PPP can be configured on both synchronous and asynchronous serial interfaces. ¡Ì
 
2 What can be concluded from the output shown in the graphic? (Choose three.)
A two-way handshake is occuring.
*The LCPs were already negotiated. ¡Ì
*The router can begin NCP negotiations. ¡Ì
The debug ppp negotiation command was executed.
*The debug ppp authentication command was executed. ¡Ì
 
3 Which command specifies a link quality over a PPP link?
ppp link 50
ppp link quality 60
ppp percentage 80
*ppp quality 90 ¡Ì
 
4 Refer to the output of the show interface Serial0/0 command in the graphic. How many NCPs have been established?
1
*2
3
4
 
5 Which authentication protocol can be spoofed to allow playback attacks?
MD5
CHAP
*PAP
NCP
 
6 Which of the following is an advantage of using time-division multiplexing (TDM) for transmitting data? (Choose two.)
It allows a single source to transmit over multiple data channels.
*Multiple sources can transmit over a single channel. ¡Ì
*Original data streams must be reconstructed at the destination. ¡Ì
TDM relies on Layer 3 protocols to operate.
 
7 Several tasks must occur before a link between two routers can pass data using PPP. Which of the following are required to establish and maintain a PPP session between two routers?
configure each host with a PPP address
configure authentication between the two routers
* send LCP and NCP frames to negotiate configuration parameters ¡Ì
send hostname and password information between the two routers
 
8 Which of the following is a reason for using such protocols as PAP and CHAP?
to establish a PPP session
to provide error checking on a WAN link
* to restrict access to networks connected by serial and ISDN links
to provide a backup hostname and privilege mode password on the router
 
9 PPP uses several protocols for communication. Which of the following are options that the LCP protocol in the PPP architecture can provide? (Choose two.)
* testing the quality of the link
routing packets between devices
assigning individual station addresses
configuring network layer protocols
* negotiating authentication options
 
10 How is the MD5 function valuable in authentication? (Choose two.)
* uses a one-way hash function
authentication occurs more rapidly
* challenges are unique
the remote router assumes control of frequency of challenge
the remote router assumes control of timing of challenge
 
11 A technician has used Telnet to gain remote access to a router that has no connectivity on its serial interface. Which command should be issued to determine if the serial cable is connected properly?
* show controllers
show processes
show run
show status
 
12 Which advantage does the multilink option provide when using PPP?
* Data transmission has load balancing possibilities.
Interfaces can be configured using both HDLC and PPP.
More than one authentication method can be used.
More than one compression protocol can be configured.
 
13 Which of the following describes the CHAP protocol? (Choose three.)
* exchanges a random challenge number during the session to verfiy identity
sends authentication password to verify identity
*prevents transmission of login information in plain text
*disconnects the PPP session if authentication fails 
initiates a two-way handshake
 
14 How did Cisco alter the HDLC encapsulation to allow a single link to carry multiple protocols?
split the transmissions into multiple channels each carrying a single protocol
identified the protocol in the FCS field
compressed the datagrams differently for each protocol
* added a type field to identify the protocol
 
15 A technician is testing the functionality of a recently installed router. The technician is unable to ping the serial interface of a remote router. The technician executes the show interface serial 0/0 command on the local router and receives the following output:
Serial0/0 is up, line protocol is down(disabled)
What are possible causes for this command output? (Choose two.)
 
interface missing the no shutdown command
clockrate command missing
*CSU/DSU failed
*interface shutdown due to high error rate
cable missing
 
16 Which command was used to display the partial output shown in the graphic?
show ppp traffic
show lcp traffic
* debug ppp negotiation
debug ppp authentication
 
17 Which of the following describes the High-Level Data Link Control protocol? (Choose three.)
* HDLC provides flow and error control.
Standard HDLC supports multiple protocols on a single link.
* HDLC uses sequencing and acknowledgements.
HDLC is defined as the default encapsulation on Cisco LAN interfaces.
* Cisco implemented a proprietary version of HDLC.
 
18 A two router network is running PPP over the serial interfaces that connect them. The enable password on the Denim router is "gateway". The Denim router also has a locally configured authentication password for the Plaid router which is "fortress". Which command must be executed on the Plaid router to allow Denim to authenticate to the Plaid router using CHAP?
Plaid(config)# enable secret gateway
Plaid(config)# enable secret fortress
Plaid(config)# username Plaid password fortress
* Plaid(config)# username Denim password fortress
Plaid(config)# hostname Plaid secret password gateway
Plaid(config)# hostname Plaid secret password fortress
 
19 ISDN BRI service uses two B channels to send data, voice, and video. If the first channel becomes saturated, the second channel can be configured to forward packets. Which command will allow ISDN to load balance across both links?
Router(config-if)# ppp quality 2
Router(config-if)# ip variance
Router(config-if)# ip maximum-paths 2
* Router(config-if)# ppp multilink
 
20 When troubleshooting the Serial 0/0 interface of a router, a technician issues the show controllers command. The following was the output of the command:
Interface is Serial0/0, electrical interface is UNKNOWN.
What can be concluded about the Serial 0/0 interface? (Choose three.)
 
* Serial0/0 is down, line protocol is down
Serial0/0 is down, line protocol is up
Serial0/0 is up, line protocol is down
The interface is neither DCE or DTE.
* The interface hardware may be faulty.
* The cabling may be improperly connected.

Cisco CCNA 4 Exam 4 answer
Cisco CCNA 4 Exam 4 answer
 
1 Which of the following are true of ISDN routers configured with dialer profiles? (Choose two.)
They do not use ACL to define interesting traffic.
* Their B channels can be configured with different subnets and encapsulation types.
* Their BRI interfaces can belong to multiple dialer pools.
They use PPP only.
They can only use the CHAP authentication protocol.
 
2 Which of the following describes the use of a SPID? (Choose two.)
selects the ISDN switch type
* identifies the line configuration of the BRI service
* allows multiple ISDN devices to share the local loop
designates whether a device is a TE1 or TE2
allows ISDN broadcasts
 
3 What is a reason why static routes are preferred over dynamic routes for DDR to operate on an ISDN interface?
 
An ISDN interface will not allow dynamic routing updates that use broadcast technology.
A dynamic route will take precedence over a static route because of its lower administrative distance.
Dynamic routing can never be considered interesting traffic by default.
Dialer-list configuration does not support dynamic routing.
* Dynamic routes may cause the ISDN connection to dial constantly to transmit updates.
 
4 What must be configured for an ISDN PRI connection? (Choose three.)
* ISDN switch type
Service Profile Identifier (SPID)
Dial-on-Demand Routing (DDR)
* PRI group time slot
* T1/E1 controller, framing type and line coding
 
5 You have just taken delivery of a new US standard Cisco 2620 router that includes a BRI "U" interface? Which of the following describes how this router will be connected in the ISDN network?
An external terminal adapter (TA) must be attached to the router for connectivity.
An NT1 must be connected to the router for connectivity.
* The router is a TE1 device and is ready to connect to the provider's network.
The router is a TE2 device and requires both a TA and NT1 for connectivity.
 
6 A network administrator is troubleshooting an ISDN connectivity problem. Users are complaining they cannot connect to the Internet. The network administrator suspects the ISDN connection attempt is timing out before a connection can be established. What command would the network administrator use to determine what the "wait for carrier" timeout value is set to?
show isdn status
show isdn active
* show dialer
show interfaces bri0/0
debug isdn q931
show ISDN interfaces
 
7 Which command configures an ISDN interface to use a switch type which is different from that used on other interfaces on the router?
Router(config)#switch-type switch-type
Router(config-if)#switch-type switch-type
Router(config)#isdn switch-type switch-type
* Router(config-if)#isdn switch-type switch-type
 
8 Which of the following protocols can be used to encapsulate data traffic sent from a router BRI interface? (Choose two.)
 
Link Access Protocol - Data
* High-Level Data Link Control
Logical Link Control
Serial Data Link Control
* Point to Point protocol
Binary Synchronous Control protocol
 
9 A small company uses an ISDN WAN link to transfer e-mail to remote sites. What command would the administrator use to determine if the ISDN link is up?
* show isdn status
show isdn active
show dialer
show interface bri0/0
debug isdn active
 
10 Why must routers be configured to specify the ISDN switch type?
* Switches use various implementations of Q.931.
The IOS of most routers lacks the ability to autosense the switch.
The switch must know what type of router it is communicating with.
The Layer 3 connection between the terminal equipment and the ISDN switch is not standardized.
 
11 Which of the following is considered out-of-band signaling?
using a frequency outside of the rated bandwidth for transmission
transmitting data over a control channel
* using a separate channel for control signals
transmitting control signals over a data channel
 
12 Which of the following is essential for all ISDN BRI interface configurations?
* ISDN switch type 
line encoding technique
line framing method
local directory number
service profile identifier
 
13 Which router command would be used to enter the mode for configuring a T1 PRI connection?
* Router(config)# controller t1 {slot/port}
Router(config)# interface pri t1 {slot/port}
Router(config)# interface pri {slot/port} t1
Router(config)# controller {slot/port} t1
 
14 Which of the following correctly describes ISDN BRI? (Choose three.)
* two 64 kbps B channels and one 16 kbps D channel
* B channel is suitable for voice data
uses in-band signaling
* uses out-of-band signaling
offers the equivalent of a T1/E1 connection
twenty-three 64 kbps B channels and one 16 kbps D channel
 
15 The network administrator of XYZ company needs to configure a new ISDN router. After entering the commands shown in the graphic, the administrator tries to access the Internet but the ISDN connection does not open. If the service provider verifies that the problem is with XYZ's configuration, what is a possible cause of the problem?
The dialer map is configured incorrectly.
The encapsulation type is configured incorrectly.
* The dialer group is configured incorrectly.
The ACL is configured incorrectly.
The isdn switch-type command needs to be configured globally.
 
16 A network administrator is troubleshooting ISDN connectivity. The administrator suspects the problem lies with the authentication protocol. What command should the administrator use to view the authentication process between the router and the ISDN switch?
debug pap authentication
debug chap authentication
* debug ppp authentication
debug isdn authentication
 
17 A network administrator in Europe has been asked to provide the network with an ISDN WAN link. The router available to provide the WAN connection is a non-modular Cisco router with an S/T interface. What further equipment will be provided by the ISP for the ISDN connection?
Nothing. The router is already suitable.
BRI WAN interface card to install in the router
* an external NT1 to terminate the local loop
a TA/NT1 device to install on the router
 
18 Which command is used within an existing ISDN network to display current call information, including the called number?
show isdn status
* show isdn active
show interfaces bri0/0
show ip interfaces

Cisco CCNA 4 Exam 5 answer
Cisco CCNA 4 Exam 5 answer
 
1 Why are SNMPv1 and SNMPv2c community strings considered a security risk?
SNMPv1 and SNMPv2c encapsulations are not encrypted by default.
* SNMPv1 and SNMPv2c community strings are sent as cleartext.
SNMPv1 and SNMPv2c are limited to 32-bit counters.
SNMPv1 and SNMPv2c uses a connectionless protocol.
 
2 Which statements are true regarding configuring SNMP? (Choose three.)
It is best to use the default read-only community strings in enterprise networks.
* It is not advisable to use the default read-write community string in an enterprise network.
* More than one read-only community string is supported.
* Authorized management stations can modify MIB objects with read-write access specified.
The maximum number of read-write strings supported is one.
 
3 Which of the following is a collection of software which includes a GUI interface to allow the network administrator to monitor and manage the network?
* network management application
network management agent
management information base
network management protocol
 
4 Which of the following does SNMP use to hold information collected about the network?
network management station
network management database
* management information base
database information agent
 
5 Which type of information does SNMP collect about a router? (Choose three.)
routing table entries
* number of certain types of error messages received
* number of bytes in and out of a device
* status of network interfaces going up and down
number of protocols running on workstations
 
6 Which operating systems support multiuser capability? (Choose three.)
* Linux
Windows 98
Windows ME
* Windows XP
* Windows 2000
 
7 Which means of communication does an SNMP network agent use to provide a network management station with important but unsolicited information?
query
broadcast
ICMP ping
* trap 
poll
 
8 How does RMON gather statistics on a segment?
analyzes traps on the segment
polls packets on the segment
* analyzes every frame on the segment
analyzes source and destination addresses
 
9 Which of the following are examples of network management applications? (Choose two.)
Windows 2000 Professional
* Ciscoworks2000
* HP Openview
Red Hat Linux
Cisco ConfigMaker
 
10 In the above illustration, which configuration commands can be used to specify the location of a managed device and the main system contacts for the device? (Choose two.)
SanJose(config-if)# snmp-server SanJose
* Atlanta(config)# snmp-server contact JPSmith
Atlanta(config)# snmp contact JPSmith
* SanJose(config)# snmp-server location SanJose
Chicago#(config)# snmp chicago
 
11 For which platform was UNIX first marketed commercially?
workstations and servers
workstations
* network servers
large mainframe systems
 
12 How does SNMPv3 address the security shortcomings of SNMPv1 and SNMPv2c?
improved SMI features
support for centralized and distributed management
* secure access to MIBs 
control of heterogeneous networks
 
13 Which statements describe the Windows 2000 operating system family? (Choose three.)
* .NET Server was designed to run enterprise level web and FTP services. 
Active Directory services run on both Windows 2000 Professional and Windows 2000 Server.
* The entire family of Windows 2000 operating systems can operate as a file, print, FTP or web server. 
Both Windows 2000 Professional and Server can support up to 256 simultaneous dialup sessions.
* .NET server was designed to compete with Linux and Unix.
 
14 An SNMPv1 agent would issue a GetResponse message to reply to which NMS requests? (Choose three.)
* GetRequest
GetBulkRequest
* GetNextRequest 
* SetRequest
GetNextbulkRequest
 
15 Which of the following describes the community strings used for SNMPv1 and SNMPv2c? (Choose two.)
* The community strings are sent using UDP.
The read only string on most devices is set to private.
The read/write string on most devices is set to public.
Only the NMA needs to be configured with the community strings.
* The community strings are sent across the network in cleartext.
 
16 Which features are supported by the Mac OS X system that make it a competitive choice for operating systems? (Choose four.)
* protected memory
sixty-two bit addressing
* preemptive multitasking
open source operating system code
* symmetric multiprocessing
* Appletalk-to-Windows network connectivity
 
17 Which command would enable logging on all supported destinations?
Router(config)# logging 131.152.0.0
Router(config)# logging routerA
* Router(config)# logging on 
Router(config)# logging enable

Cisco CCNA 4 Exam 6 answer
Cisco CCNA 4 Exam 6 answer
 
1 Why are SNMPv1 and SNMPv2c community strings considered a security risk?
SNMPv1 and SNMPv2c encapsulations are not encrypted by default.
* SNMPv1 and SNMPv2c community strings are sent as cleartext. 
SNMPv1 and SNMPv2c are limited to 32-bit counters.
SNMPv1 and SNMPv2c uses a connectionless protocol.
 
2 Which statements are true regarding configuring SNMP? (Choose three.)
It is best to use the default read-only community strings in enterprise networks.
* It is not advisable to use the default read-write community string in an enterprise network.
* More than one read-only community string is supported.
* Authorized management stations can modify MIB objects with read-write access specified.
The maximum number of read-write strings supported is one.
 
3 Which of the following is a collection of software which includes a GUI interface to allow the network administrator to monitor and manage the network?
* network management application
network management agent
management information base
network management protocol
 
4 Which of the following does SNMP use to hold information collected about the network?
network management station
network management database
* management information base
database information agent
 
5 Which type of information does SNMP collect about a router? (Choose three.)
routing table entries
* number of certain types of error messages received
* number of bytes in and out of a device
* status of network interfaces going up and down
number of protocols running on workstations
 
6 Which operating systems support multiuser capability? (Choose three.)
* Linux
Windows 98
Windows ME
* Windows XP
* Windows 2000
 
7 Which means of communication does an SNMP network agent use to provide a network management station with important but unsolicited information?
query
broadcast
ICMP ping
* trap
poll
 
8 How does RMON gather statistics on a segment?
analyzes traps on the segment
polls packets on the segment
* analyzes every frame on the segment
analyzes source and destination addresses
 
9 Which of the following are examples of network management applications? (Choose two.)
Windows 2000 Professional
* Ciscoworks2000
* HP Openview
Red Hat Linux
Cisco ConfigMaker
 
10 In the above illustration, which configuration commands can be used to specify the location of a managed device and the main system contacts for the device? (Choose two.)
SanJose(config-if)# snmp-server SanJose
* Atlanta(config)# snmp-server contact JPSmith
Atlanta(config)# snmp contact JPSmith
* SanJose(config)# snmp-server location SanJose
Chicago#(config)# snmp chicago
 
11 For which platform was UNIX first marketed commercially?
workstations and servers
workstations
* network servers
large mainframe systems
 
12 How does SNMPv3 address the security shortcomings of SNMPv1 and SNMPv2c?
improved SMI features
support for centralized and distributed management
* secure access to MIBs
control of heterogeneous networks
 
13 Which statements describe the Windows 2000 operating system family? (Choose three.)
* .NET Server was designed to run enterprise level web and FTP services.
Active Directory services run on both Windows 2000 Professional and Windows 2000 Server.
* The entire family of Windows 2000 operating systems can operate as a file, print, FTP or web server.
Both Windows 2000 Professional and Server can support up to 256 simultaneous dialup sessions.
* .NET server was designed to compete with Linux and Unix.
 
14 An SNMPv1 agent would issue a GetResponse message to reply to which NMS requests? (Choose three.)
* GetRequest
GetBulkRequest
* GetNextRequest
* SetRequest
GetNextbulkRequest
 
15 Which of the following describes the community strings used for SNMPv1 and SNMPv2c? (Choose two.)
* The community strings are sent using UDP. 
The read only string on most devices is set to private.
The read/write string on most devices is set to public.
Only the NMA needs to be configured with the community strings.
* The community strings are sent across the network in cleartext.
 
16 Which features are supported by the Mac OS X system that make it a competitive choice for operating systems? (Choose four.)
* protected memory
sixty-two bit addressing
* preemptive multitasking
open source operating system code
* symmetric multiprocessing
* Appletalk-to-Windows network connectivity
 
17 Which command would enable logging on all supported destinations?
Router(config)# logging 131.152.0.0
Router(config)# logging routerA
* Router(config)# logging on
Router(config)# logging enable

Cisco CCNA 4 Final Exam answer
Cisco CCNA 4 Final Exam answer
 
1. Which of the following describes the roles of devices in a WAN?
A CSU/DSU terminates a digital local loop.
A modem terminates an analog local loop.
A router is commonly considered a DTE device.
 
2. What value in the address field of a Frame Relay header identifies the destination of the frame?
DLCI
 
3. The serial PPP link between the Left and Right routers is configured as shown in the diagram. Which configuration issue explains why the link is unable to establish a PPP session?
The usernames are misconfigured.
 
4. The output of the show interfaces serial 0/0 command for a frame-relay connection indicates that the serial line is up but the line protocol is down. What are possible causes for this? (Choose two.) (2 / 5)
There is an LMI-type mismatch between the Frame Relay switch and the router.
The cable is disconnected.
 
5. Which statements are correct about the point in the network where the responsibility of the service provider ends?
The International point is on the customer side of the network terminating unit(NTU).
The United States point is at the interface of the customer-provided equipment and the local loop.
The point is called the demarcation point.
 
6. While prototyping an internetwork in the corporate lab, a network administrator is testing a serial link between serial 0/0 interfaces on two routers. The labels on the serial cable ends have been damaged and are unreadable. What command can be issued to determine which router is connected to the DCE cable end?
show controllers serial 0/0
 
7. A network technician determines DHCP clients are not working properly. The clients are receiving IP configuration information from a DHCP server configured on the router but cannot access the Internet. From the output in the graphic, what is the most likely problem?
The DHCP pool is not bound to the interface.
 
8. A technician enters the interface serial 0/0.1 multipoint command when configuring a router. What effect will the multipoint keyword have in this configuration?
Split-horizon issues will need to be resolved for this network if RIP is the routing protocol.
All the participating interfaces of remote routers will be configured in the same subnet.
 
9. When configuring a Frame Relay connection, when should a static Frame Relay map be used?
when the remote router does not support Inverse ARP
when broadcast traffic and multicast traffic over the PVC must be controlled
 
10. Which router command would be used to associate a Layer 2 address with the corresponding Layer 3 address in the internetwork in the diagram?
RouterA(config-if)#frame-relay map ip 192.168.15.2 100 broadcast
 
11. Which of the following ISDN protocols is responsible for call setup and call teardown?
ITU-T Q.921
 
12. What are two ways to resolve split-horizon issues in a Frame Relay network? (Choose two.) (2 / 5)
create a full-mesh topology
use point-to-point subinterfaces
 
13. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco 806 broadband router?
defines which addresses are allowed into the router
 
14. A system administrator is unable to ping the Serial0/0 interface of RouterB from RouterA. During the troubleshooting process, the following facts are established: (0 / 5)
- IP addressing and subnet masks are correct.
- RouterA is a Cisco router and RouterB is a router from another vendor.
- RouterA is configured with the default encapsulation.
- The serial interfaces on both routers are up.
- The protocol is down on the serial interfaces of both routers.
 
15. What should the administrator do to solve the problem?
Change the encapsulation on both routers to PPP.
 
16. An ISDN circuit from a branch office is remaining connected to the regional office. A network administrator determines a user has initiated a continuous ping from a desktop computer to the regional office. Which configuration change would allow the ISDN circuit to disconnect during any attempts to ping, while otherwise functioning properly?
change the dialer list to exclude ICMP as interesting
 
17. - call is made (1 / 6)
3,2,1,4
 
18. Which protocol should be chosen to support WAN connectivity in a multi-vendor system and provide strong security through authentication?
PPP with CHAP
 
19. Which of the following are valid steps for a basic ISDN BRI configuration?
set the SPIDs if required by the ISDN switch

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