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Q11. - (Topic 2) 

A switch receives a frame on one of its ports. There is no entry in the MAC address table for the destination MAC address. What will the switch do with the frame? 

A. drop the frame 

B. forward it out of all ports except the one that received it 

C. forward it out of all ports 

D. store it until it learns the correct port 

Answer:

Explanation: 

Understanding this concept is prime for understanding that when switch receives the data frame from the host not having the MAC address already in the MAC table, it will add the MAC address to the source port on the MAC address table and sends the data frame. If the switch already has the MAC address in its table for the destination, it will forward the frame directly to the destination port. If it was not already in its MAC table, then they frame would have been flooded out all ports except for the port that it came from. 


Q12. - (Topic 3) 

What is the default administrative distance of OSPF? 

A. 90 

B. 100 

C. 110 

D. 120 

Answer:

Explanation: 

Administrative distance is the feature that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the help of an administrative distance value. 

Default Distance Value Table 

This table lists the administrative distance default values of the protocols that Cisco supports: 


Q13. - (Topic 5) 

Refer to the exhibit. 

A TFTP server has recently been installed in the Atlanta office. The network administrator is located in the NY office and has made a console connection to the NY router. After establishing the connection they are unable to backup the configuration file and IOS of the NY router to the TFTP server. What is the cause of this problem? 

A. The NY router has an incorrect subnet mask. 

B. The TFTP server has an incorrect IP address. 

C. The TFTP server has an incorrect subnet mask. 

D. The network administrator computer has an incorrect IP address. 

Answer:

Explanation: 

The TFTP server is using a mask of 255.255.255.240 (/28) while the router is configured with a /29. Because of this, the Atlanta router does not see the TFTP server as being in the same subnet. 


Q14. - (Topic 7) 

Which statement about static routes is true? 

A. The source interface can be configured to make routing decisions. 

B. A subnet mask is entered for the next-hop address. 

C. The subnet mask is 255.255 255.0 by default 

D. The exit interface can be specified to indicate where the packets will be routed. 

Answer:

Explanation: 

Static routing can be used to define an exit point from a router when no other routes are available or necessary. This is called a default route. 


Q15. - (Topic 5) 

Refer to the exhibit. 

The network administrator is testing connectivity from the branch router to the newly installed application server. What is the most likely reason for the first ping having a success rate of only 60 percent? 

A. The network is likely to be congested, with the result that packets are being intermittently dropped. 

B. The branch router had to resolve the application server MAC address. 

C. There is a short delay while NAT translates the server IP address. 

D. A routing table lookup delayed forwarding on the first two ping packets. 

E. The branch router LAN interface should be upgraded to FastEthernet. 

Answer:

Explanation: 

Initially the MAC address had to be resolved, but once it is resolved and is in the ARP table of the router, pings go through immediately. 


Q16. - (Topic 7) 

Which statement about unicast frame forwarding on a switch is true? 

A. The TCAM table stores destination MAC addresses 

B. If the destination MAC address is unknown, the frame is flooded to every port that is configured in the same VLAN except on the port that it was received on. 

C. The CAM table is used to determine whether traffic is permitted or denied on a switch 

D. The source address is used to determine the switch port to which a frame is forwarded 

Answer:


Q17. - (Topic 5) 

Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a correct configuration. 

Given the partial configurations shown in the exhibit, what is the problem on the Brevard router that is causing the lack of connectivity? 

A. A loopback is not set. 

B. The IP address is incorrect. 

C. The subnet mask is incorrect. 

D. The serial line encapsulations are incompatible. 

E. The maximum transmission unit (MTU) size is too large. 

F. The bandwidth setting is incompatible with the connected interface. 

Answer:

Explanation: 

The connection between two routers must have IP addresses that belong to the same subnet, but in this case Atlanta is using 192.168.10.1/24 and the other is in 192.168.11.1/24. 


Q18. - (Topic 3) 

Which address are OSPF hello packets addressed to on point-to-point networks? 

A. 224.0.0.5 

B. 172.16.0.1 

C. 192.168.0.5 

D. 223.0.0.1 

E. 254.255.255.255 

Answer:

Explanation: 

Why does the show ip ospf neighbor Command Reveal Neighbors in the Init State? http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f11.shtml OSPF hello packets have a destination address of 224.0.0.5 (the all ospf routers multicast 

address). 


Q19. - (Topic 3) 

What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router? 

A. 2 

B. 8 

C. 16 

D. unlimited 

Answer:

Explanation: 

Maximum-paths (OSPF) 

To control the maximum number of parallel routes that Open Shortest Path First (OSPF) 

can support, use the maximum-paths command. 

Syntax Description 

maximum 

Maximum number of parallel routes that OSPF can install in a routing table. The range is from 1 to 16 routes. 

Command Default 

8 paths 


Q20. - (Topic 5) 

Refer to the exhibit. 

The DHCP settings have recently been changed on the DHCP server and the client is no longer able to reach network resources. What should be done to correct this situation? 

A. Verify that the DNS server address is correct in the DHCP pool. 

B. Ping the default gateway to populate the ARP cache. 

C. Use the tracert command on the DHCP client to first determine where the problem is located. 

D. Clear all DHCP leases on the router to prevent address conflicts. 

E. Issue the ipconfig command with the /release and /renew options in a command window. 

Answer:

Explanation: 

A PC will retain its DHCP assigned IP address until the lease time expires, which often times is 24 hours or more. When changes are made to the DHCP server, the client should issue the ipconfig/release and then ipconfig/renew commands to obtain a new IP address lease.