Cisco 300-135 Exam Questions

Question 6 of 139

Scenario:
You have been asked by your customer to help resolve issues in their routed network. Their network engineer has deployed HSRP. On closer inspection HSRP doesn't appear to be operating properly and it appears there are other network problems as well. You are to provide solutions to all the network problems.
Exam 300-135: Question 6 - Image 1

You examine the configuration on R5 and discover that no routes are being learned from R4. Which issue prevents the route entries from being installed in the routing table?

HSRP issue between R5 and R4

There is an OSPF issue between R5and R4

There is a DHCP issue between R5 and R4

The distribute-list configured on R5 is blocking route entries

The ACL configured on R5 is blocking traffic for the subnets advertised from R4.

Correct Answer: B

If we issue the "show ip route" and "show ip ospf neighbor" commands on R5, we see that there are no learned OSPF routes and he has no OSPF neighbors.
Exam 300-135: Question 6 - Image 6

Question 7 of 139

Scenario:
A customer network engineer has edited their OSPF network configuration and now your customer is experiencing network issues. They have contacted you to resolve the issues and return the network to full functionality.
Exam 300-135: Question 7 - Image 1

The OSPF neighbor relationship has been lost between R1 and R3. What is causing this problem?

The serial interface in R1 should be taken out of the shutdown state.

A neighbor statement needs to be configured in R1 and R3 pointing at each other.

The R1 network type should be changed to point-to-multipoint non-broadcast.

The hello, dead and wait timers on R1 need to be reconfigured to match the values on R3.

Correct Answer: D

In order for two OSPF routers to become neighbors, they must have matching network types across the links. In this case, we see that R1 has been configured as non-broadcast and R3 is using point to point non-broadcast.
Exam 300-135: Question 7 - Image 8

This can be seen by issuing the "show running-config" command on each router, or the "show ip ospf interface" command:
Exam 300-135: Question 7 - Image 10

Question 8 of 139

Connectivity from R3 to R4, R5 and R6 has been lost. How should connectivity be reestablished?

Configure R4 with a virtual link to 192.168.13.2

Change the R3 and R4 hello-interval and retransmit-interface timers to zero so the link won't go down.

Add an OSPF network statement for 4.4.4.4 0.0.0.0 area 1 in R3

Add an OSPF network statement for 192.168.34.3 0.0.0.255 area 2 in R3

Add an OSPF network statement for 192.168.34.0 0.0.0.255 area 1 in R3

Correct Answer: E

Based on the network diagram, we know that a virtual link will need to be configured to logically connect area 2 to the back area 0. However, this is not the problem as we can see that R3 has been correctly configured to do this. It is, however, missing the network statement for the link to R4.
Here, we see that the link to R4 is using the 192.168.34.0 network, but that this network has not been added to OSPF
Exam 300-135: Question 8 - Image 8

Based on the network diagram, this link should be added to Area 1, not Area 2. E

Question 9 of 139

After resolving the issues between R3 and R4. Area 2 is still experiencing routing issues. Based on the current router configurations, what needs to be resolved for routes to the networks behind R5 to be seen in the company intranet?

Configure R4 and R5 to use MD5 authentication on the Ethernet interfaces that connect to the common subnet.

Configure Area 1 in both R4 and R5 to use MD5 authentication.

Add ip ospf authentication-key 7 BEST to the R4 Ethernet interface that connects to R5 and ip ospf authentication-key 7 BEST to R5 Ethernet interface that connects to R4.

Add ip ospf authentication-key CISCO to R4 Ethernet 0/1 and add area 2 authentication to the R4 OSPF routing process. D

Correct Answer:

Here, we see from the running configuration of R5 that OSPF authentication has been configured on the link to R4:
Exam 300-135: Question 9 - Image 8

However, this has not been done on the link to R5 on R4:
Exam 300-135: Question 9 - Image 9

Explanation

Question 10 of 139

The 6.6.0.0 subnets are not reachable from R4. How should the problem be resolved?

Edit access-list 46 in R6 to permit all the 6.6.0.0 subnets

Apply access-list 46 in R6 to a different interface

Apply access-list 1 as a distribute-list out under router ospf 100 in R4

Remove distribute-list 64 out on R6

Remove distribute-list 1 in ethernet 0/1 in R4

Remove distribute-list 1 in ethernet 0/0 in R4 D

Correct Answer:

Here we see from the running configuration of R6 that distribute list 64 is being used in the outbound direction to all OSPF neighbors.
Exam 300-135: Question 10 - Image 8

However, no packets will match the 6.6.0.0 in this access list because the first line blocks all 6.0.0.0 networks, and since the 6.6.0.0 networks will also match the first line of this ACL, these OSPF networks will not be advertised because they are first denied in the first line of the ACL. Explanation