CCNA 4 Final Exam Answers 2011
1. Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to ping the default gateway. What is the cause of the problem?
The default gateway is in the wrong subnet.
STP has blocked the port that PC1 is connected to.
Port Fa0/2 on S2 is assigned to the wrong VLAN.
S2 has the wrong IP address assigned to the VLAN30 interface.
2. Which Frame Relay flow control mechanism is used to signal routers that they should reduce the flow rate of frames?
DE
BE
CIR
FECN
CBIR
3. What is the result of adding the global command service password-encryption to the configuration of a router?
Line passwords are encrypted with type 7 encryption.
Enable passwords are encrypted with type 5 encryption.
All services must provide an encrypted password to function.
Only encrypted messages are allowed for router communication.
CCNA 4 Final Exam Answers (4)
1. Identify the factors that contribute to congestion on an Ethernet LAN. (Choose three.)
**improper placement of enterprise level servers
**addition of hosts to a physical segment
replacement of hubs with workgroup switches
**increasing use of bandwidth intensive network applications
migration to full-duplex Ethernet within the LAN
2. Which of the following are examples of TCP/IP application layer protocols? (Choose three.)
**a terminal emulation protocol that supports remote console connections with various network devices
a protocol created by IBM that makes it easier for mainframes to connect to remote offices
**a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet
a protocol that controls the rate at which data is sent to another computer
**a protocol that exchanges network management information between a network device and a management console
3. Which of the following eliminates switching loops?
hold-down timers
poison reverse
**spanning tree protocol
time to live
split horizon protocol
4. The show cdp neighbors command is a very useful network troubleshooting tool. Using the output in the graphic, select the statements that are true. (Choose two.)
CDP operates at the network layer of the OSI model.
**The output of this command displays information about directly connected Cisco devices only.
The switch is attached to the SanJose1 FastEthernet0/21 interface.
SanJose1 is running CDP version 12.0.
SanJose1 has two fully operational, cdp-enabled Cisco switches directly connected to it.
**SanJose2 is a 2600 series router running several routed protocols
5. A network administrator can ping the Denver router, but gets a ‘Password Required but None Set’ message when trying to connect remotely via Telnet. Which command sequence must be applied to the Denver router to allow remote access?
Router(config)# line console 0
Router(config-line)# login
Router(config-line)# password cisco
**Router(config)# line vty 0 4
Router(config-line)# login
Router(config-line)# password cisco
Router(config)# line virtual terminal
Router(config-line)# enable login
Router(config-line)# password cisco
Router(config)# line vty 0 4
Router(config-line)# enable secret
Router(config-line)# password cisco
Router(config)# enable secret cisco
Router(config)# enable cisco
CCNA 4 Final Exam Answers (3)
1. A network administrator is asked to design a system to allow simultaneous access to the Internet for 250 users. The ISP for this network can only supply five public IPs. What can be used to accomplish this task?
routable translation
dynamic translation
static translation
**port address translation
2. The LAN attached to the Ethernet interface of the Raleigh router shown in the graphic is addressed with private IP addresses. If one public IP is assigned to the company, which commands could be used in a configuration that allows all devices with private IPs in this network to access the Internet? (Choose two.)
**ip nat inside source list 1 interface serial0 overload
ip nat outside source list 1 interface serial0 overload
ip nat inside serial0
**ip nat inside source list 1 pool Raleigh overload
ip nat inside Raleigh overload
ip inside nat source list 1 interface serial0 Raleigh
3. The command output shown in the graphic was taken from a Cisco 806 broadband router. Which kind of address translation is in effect on this router?
static
dynamic
**overload
private
public
4. Which of the following IP addresses are defined by RFC 1918 as private addresses? (Choose three.)
**192.168.146.0/22
172.10.25.0/16
**172.31.0.0/16
20.0.0.0/8
**10.172.92.8/29
5. How will data be transmitted from the router to the ISP if the router has the two links shown in the graphic?
Both links will transmit data at the same rate.
1544 bits can be transmitted simultaneously from the router over the T1 line.
**Both links will transmit bits one by one.
The 56K link will transmit a maximum of 53 bits at the same time.
CCNA 4 Final Exam Answers (2)
1. A technician has been asked to run Cisco SDM one-step lockdown on the router of a customer. What will be the result of this process?
Traffic is only forwarded from SDM-trusted Cisco routers.
Security testing is performed and the results are saved as a text file stored in NVRAM.
**The router is tested for potential security problems and any necessary changes are made.
All traffic entering the router is quarantined and checked for viruses before being forwarded.
2. Refer to the exhibit. A network administrator is trying to configure a router to use SDM but it is not functioning correctly. What could be the problem?
The username and password are not configured correctly.
The authentication method is not configured correctly.
The HTTP timeout policy is not configured correctly.
**The vtys are not configured correctly.
3. Refer to the exhibit. How is the TCP/IP configuration information specified by the default-router and dns-server commands made available?
The TCP/IP information is forwarded to a 10.0.1.3 to be supplied to DHCP clients.
**The TCP/IP information is used by DHCP clients that are configured to request a configuration from R1.
The TCP/IP information is supplied to any DHCP client on the network connected to the FastEthernet 0/0 interface of R1.
The TCP/IP information is applied to each packet that enters R1 through the FastEthernet 0/0 interface that are hosts on the 10.0.1.0 /24 network except packets from addresses 10.0.1.2, 10.0.1.16, and 10.0.1.254.
4. What is a major characteristic of a worm?
malicious software that copies itself into other executable programs
tricks users into running the infected software
a set of computer instructions that lies dormant until triggered by a specific event
**exploits vulnerabilities with the intent of propagating itself across a network
5. Refer to the exhibit. What can be concluded from the exhibited output of the debug ip nat command?
The 10.1.1.225 host is exchanging packets with the 192.168.0.10 host.
The native 10.1.200.254 address is being translated to 192.168.0.10.
**The 192.168.0.0/24 network is the inside network.
Port address translation is in effect.
CCNA 4 Final Exam Answers (1)
1. Which of the following describes the roles of devices in a WAN? (Choose three.)
**A CSU/DSU terminates a digital local loop.
A modem terminates a digital local loop.
A CSU/DSU terminates an analog local loop.
**A modem terminates an analog local loop.
**A router is commonly considered a DTE device.
A router is commonly considered a DCE device.
2. What value in the address field of a Frame Relay header identifies the destination of the frame?
CIR
DE
**DLCI
ISDN
FRAD
PVC
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 IP addresses must be on different subnets.
**The usernames are misconfigured.
The passwords must be different for the CHAP authentication.
The clock rate must be 56000.
The clock rate is configured on the wrong end of the link.
Interface serial 0/0 on Left must connect to interface serial 0/1 on Right.
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.)
**There is an LMI-type mismatch between the Frame Relay switch and the router.
There is no clock present on the serial interface.
The interface is shut down.
RARP is not functioning on 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? (Choose three.)
**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 responsibility for this point is controlled by IANA.
**The point is called the demarcation point.
The point is typically located at the service provider’s central office.
The point is located between the customer’s local area networks.