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Q31. - (Topic 19) 

The implementation group has been using the test bed to do an IPv6 'proof-of-concept1. After several changes to the network addressing and routing schemes, a trouble ticket has been opened indicating that the loopback address on R1 (2026::111:1) is not able to ping the loopback address on DSW2 (2026::102:1).

Use the supported commands to isolate the cause of this fault and answer the following question.

On which device is the fault condition located?

A. R1

B. R2

C. R3

D. R4

E. DSW1

F. DSW2

G. ASW1

H. ASW2

Answer: B

Explanation:

Start to troubleshoot this by pinging the loopback IPv6 address of DSW2 (2026::102:1). This can be pinged from DSW1, R4, and R3, which leads us to believe that the issue is with R2. Going further, we can see that R2 only has an IPV6 OSPF neighbor of R1, not R3:

We can then see that OSPFv3 has not been enabled on the interface to R3:

So the problem is with R2, related to IPV6 Routing, and the fix is to enable the "ipv6 ospf 6 area 0" command under the serial 0/0/0.23 interface.


Q32. - (Topic 9) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

The fault condition is related to which technology? 

A. BGP 

B. NTP 

C. IP NAT 

D. IPv4 OSPF Routing 

E. IPv4 OSPF Redistribution 

F. IPv6 OSPF Routing 

G. IPv4 layer 3 security 

Answer: A Explanation: 

On R1 under router the BGP process Change neighbor 209.56.200.226 remote-as 65002 statement to neighbor 209.65.200.226 remote-as 65002 


Q33. - (Topic 16) 

The implementations group has been using the test bed to do a ‘proof-of-concept'. After several changes to the network addressing, routing schemes, a trouble ticket has been opened indicating that the loopback address on R1 (2026::111:1) is not able to ping the loopback address on DSW2(2026::102:1). 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

The fault condition is related to which technology? 

A. NTP 

B. IPv4 OSPF Routing 

C. IPv6 OSPF Routing 

D. IPv4 layer 3 security 

Answer: C 

Explanation: 

On R2, IPV6 OSPF routing, configuration is required to add ipv6 ospf 6 area 0 under interface serial 0/0/0.23 


Q34. - (Topic 14) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

On which device is the fault condition located? 

A. R1 

B. R2 

C. R3 

D. R4 

E. DSW1 

F. DSW2 

G. ASW1 

H. ASW2 

Answer: D 

Explanation: 

The EIGRP AS number configured on R4 is wrong. 


Q35. - (Topic 1)

Which three features are benefits of using GRE tunnels in conjunction with IPsec for building siteto-site VPNs? (Choose three.)

A. allows dynamic routing over the tunnel

B. supports multi-protocol (non-IP) traffic over the tunnel

C. reduces IPsec headers overhead since tunnel mode is used

D. simplifies the ACL used in the crypto map

E. uses Virtual Tunnel Interface (VTI) to simplify the IPsec VPN configuration

Answer: A,B,D


Q36. - (Topic 3) 

You have been brought in to troubleshoot an EIGRP network. A network engineer has made configuration changes to the network rendering some locations unreachable. You are to locate the problem and suggest solution to resolve the issue. 

R5 has become partially isolated from the remainder of the network. R5 can reach devices on directly connected networks but nothing else. What is causing the problem? 

A. An outbound distribute list in R3 

B. Inbound distribute lists in R5 

C. An outbound distribute list in R6 

D. Incorrect EIGRP routing process ID in R5 

Answer: B 

Explanation: 

Here we see that distribute list 3 has been applied to EIGRP on router R%, but access-list 3 contains only deny statements so this will effectively block all routing advertisements from its two EIGRP neighbors, thus isolating R5 from the rest of the EIGRP network: 

Topic 4, Troubleshooting HSRP 

13. - (Topic 4) 

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. 

Examine the configuration on R4. The routing table shows no entries for 172.16.10.0/24 and 172.16.20.0/24. Identify which of the following is the issue preventing route entries being installed on R4 routing table? 

A. HSRP issue between R4 and R2 

B. This is an OSPF issue between R4 and R2 

C. This is a DHCP issue between R4 and R2 

D. The distribute-list configured on R4 is blocking route entries 

E. The ACL configured on R4 is blocking inbound traffic on the interface connected to R2 

Answer: D 

Explanation: 

If we look at the configuration on R4 we see that there is a distribute list applied to OSPF, which blocks the 172.16.20.0/24 and 172.16.10.0/24 networks. 


Q37. - (Topic 1)

Exhibit:

A network administrator is troubleshooting an EIGRP connection between RouterA, IP address 10.1.2.1, and RouterB, IP address 10.1.2.2. Given the debug output on RouterA, which two statements are true? (Choose two.)

A. RouterA received a hello packet with mismatched autonomous system numbers.

B. RouterA received a hello packet with mismatched hello timers.

C. RouterA received a hello packet with mismatched authentication parameters.

D. RouterA received a hello packet with mismatched metric-calculation mechanisms.

E. RouterA will form an adjacency with RouterB.

F. RouterA will not form an adjacency with RouterB.

Answer: D,F


Q38. - (Topic 2) 

A customer network engineer has made configuration changes that have resulted in some loss of connectivity. You have been called in to evaluate a switch network and suggest resolutions to the problems. 

Which of statement is true regarding STP issue identified with switches in the given topology? 

A. Loopguard configured on the New_Switch places the ports in loop inconsistent state 

B. Rootguard configured on SW1 places the ports in root inconsistent state 

C. Bpduguard configured on the New_Switch places the access ports in error-disable 

D. Rootguard configured on SW2 places the ports in root inconsistent state 

Answer: A 

Explanation: 

On the new switch, we see that loopguard has been configured with the "spanning-tree guard loop" command. 

The loop guard feature makes additional checks. If BPDUs are not received on a non-designated port, and loop guard is enabled, that port is moved into the STP loop-inconsistent blocking state, instead of the listening / learning / forwarding state. Without the loop guard feature, the port assumes the designated port role. The port moves to the STP forwarding state and creates a loop.