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Q1. – (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. 

Q2. – (Topic 3) 

Refer to the exhibit. 

Why are two OSPF designated routers identified on Core-Router? 

A. Core-Router is connected to more than one multi-access network. 

B. The router at 208.149.23.130 is a secondary DR in case the primary fails. 

C. Two router IDs have the same OSPF priority and are therefore tied for DR election 

D. The DR election is still underway and there are two contenders for the role. 

Answer:

Explanation: 

OSPF elects one DR per multi-access network. In the exhibit there are two DR so there must have more than one multi-access network. 

Q3. – (Topic 5) 

Refer to the exhibit. 

Serial 0/0 does not respond to a ping request from a host on the FastEthernet 0/0 LAN. How can this problem be corrected? 

A. Enable the Serial 0/0 interface. 

B. Correct the IP address for Serial 0/0. 

C. Correct the IP address for FastEthernet 0/0 

D. Change the encapsulation type on Serial 0/0 

E. Enable autoconfiguration on the Serial 0/0 interface 

Answer:

Explanation: 

Serial 0/0 interface is administratively down therefore, you will have to run the "no shutdown" command to enable the interface for data. 

Q4. – (Topic 3) 

Scenario 

Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links. 

You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices. 

R1 does not form an OSPF neighbor adjacency with R2. Which option would fix the issue? 

A. R1 ethernetO/1 is shutdown. Configure no shutdown command. 

B. R1 ethernetO/1 configured with a non-default OSPF hello interval of 25: configure no ip ospf hello-interval 25 

C. R2 ethernetO/1 and R3 ethernetO/O are configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25 

D. Enable OSPF for R1 ethernetO/1; configure ip ospf 1 area 0 command under ethernetO/1 

Answer:

Explanation: 

Looking at the configuration of R1, we see that R1 is configured with a hello interval of 25 on interface Ethernet 0/1 while R2 is left with the default of 10 (not configured). 

Q5. – (Topic 3) 

Which statement about IPv6 is true? 

A. Addresses are not hierarchical and are assigned at random. 

B. Only one IPv6 address can exist on a given interface. 

C. There are 2.7 billion addresses available. 

D. Broadcasts have been eliminated and replaced with multicasts. 

Answer:

Explanation: 

IPv6 has three types of addresses, which can be categorized by type and scope: 

Unicast addresses. A packet is delivered to one interface. 

Multicast addresses. A packet is delivered to multiple interfaces. 

Anycast addresses. A packet is delivered to the nearest of multiple interfaces (in terms of 

routing distance). 

IPv6 does not use broadcast messages. 

Unicast and anycast addresses in IPv6 have the following scopes (for multicast addresses, 

the scope are built into the address structure): 

Link-local. The scope is the local link (nodes on the same subnet). 

Site-local. The scope is the organization (private site addressing). 

Global. The scope is global (IPv6 Internet addresses). 

In addition, IPv6 has special addresses such as the loopback address. The scope of a 

special address depends on the type of special address. 

Much of the IPv6 address space is unassigned. 

http://technet.microsoft.com/en-us/library/cc757359(v=ws.10).aspx 

Q6. – (Topic 5) 

Refer to the exhibit. 

A technician pastes the configurations in the exhibit into the two new routers shown. Otherwise, the routers are configured with their default configurations. 

A ping from Host1 to Host 2 fails, but the technician is able to ping the S0/0 interface of R2 from Host 1. The configurations of the hosts have been verified as correct. What could be the cause of the problem? 

A. The serial cable on R1 needs to be replaced. 

B. The interfaces on R2 are not configured properly 

C. R1 has no route to the 192.168.1.128 network. 

D. The IP addressing scheme has overlapping subnetworks. 

E. The ip subnet-zero command must be configured on both routers. 

Answer:

Explanation: 

Without a static route pointing to the host 2 network the router R1 is unaware of the path to take to reach that network and reply traffic cannot be sent. 

Q7. – (Topic 1) 

How does a switch differ from a hub? 

A. A switch does not induce any latency into the frame transfer time. 

B. A switch tracks MAC addresses of directly-connected devices. 

C. A switch operates at a lower, more efficient layer of the OSI model. 

D. A switch decreases the number of broadcast domains. 

E. A switch decreases the number of collision domains. 

Answer:

Explanation: 

Some of the features and functions of a switch include: 

A switch is essentially a fast, multi-port bridge, which can contain dozens of ports. 

Rather than creating two collision domains, each port creates its own collision domain. 

In a network of twenty nodes, twenty collision domains exist if each node is plugged into its 

own switch port. 

If an uplink port is included, one switch creates twenty-one single-node collision domains. 

A switch dynamically builds and maintains a Content-Addressable Memory (CAM) table, 

holding all of the necessary MAC information for each port. 

For a detailed description of how switches operate, and their key differences to hubs, see 

the reference link below. 

Reference: http://www.cisco.com/warp/public/473/lan-switch-cisco.shtml 

Q8. – (Topic 5) 

Refer to the exhibit. 

An administrator replaced the 10/100 Mb NIC in a desktop PC with a 1 Gb NIC and now the PC will not connect to the network. The administrator began troubleshooting on the switch. Using the switch output shown, what is the cause of the problem? 

A. Speed is set to 100Mb/s. 

B. Input flow control is off. 

C. Encapsulation is set to ARPA. 

D. The port is administratively down. 

E. The counters have never been cleared. 

Answer:

Explanation: 

For PC to switch connectivity, the speed settings must match. In this case, the 1 Gb NIC will not be able to communicate with a 100Mb fast Ethernet interface, unless the 1Gb NIC can be configured to connect at 100Mb. 

Q9. – (Topic 3) 

Which router command will configure an interface with the IP address 10.10.80.1/19? 

A. router(config-if)# ip address 10.10.80.1/19 

B. router(config-if)# ip address 10.10.80.1 255.255.0.0 

C. router(config-if)# ip address 10.10.80.1 255.255.255.0 

D. router(config-if)# ip address 10.10.80.1 255.255.224.0 

E. router(config-if)# ip address 10.10.80.1 255.255.240.0 

F. router(config-if)# ip address 10.10.80.1 255.255.255.240 

Answer:

Explanation: 

255.255.224 equal /19 in CIDR format hence the answer 

Q10. – (Topic 1) 

Refer to the exhibit. 

The exhibit is showing the topology and the MAC address table. Host A sends a data frame to host D. What will the switch do when it receives the frame from host A? 

A. The switch will add the source address and port to the MAC address table and forward the frame to host D. 

B. The switch will discard the frame and send an error message back to host A. 

C. The switch will flood the frame out of all ports except for port Fa0/3. 

D. The switch will add the destination address of the frame to the MAC address table and forward the frame to host D. 

Answer:

Explanation: 

When switch receives the data frame from the host not having the MAC address already on the MAC table, it will add the MAC address to source port on MAC address table and sends the data frame.