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CCIE Routing and Switching (v5.1)

Question No: 51 – (Topic 1)

Refer to the exhibit.

You are configuring Router 1 and Routef2 for L2TPv3 tunneling.Which

two additional configurations are required to enable Router 1 and Routei#39;2 to establish the tuimel?(choose two)

1. Router 1 must be configured to encapsulate traffic by using L2TPv3 under the pseudowire-class RltoR2.

2. An IP address must be confiaured on interface FastEthernet1/0 onRouter1.

3. Loopback 0 on Router1 must be advertised to Router2.

4. Cisco Express Fowarding must be disabled on Router1.

5. Cisco Discovery Protocol must be enabled on interface FastEthernet1/0 onRouter1.

Answer: A,C

Question No: 52 – (Topic 1)

Refer to the exhibit.

Which two statements about this CoS mapping are true? (Choose two.)

1. It maps the first queue and first threshold to CoS2 and CoS3 .

2. It maps the second queue and first threshold to CoS 2.

3. It maps the second queue and first threshold to CoS 3.

4. It maps CoS values to the transmit queue threshold.

5. It maps the second threshold to CoS 2 and CoS 3.

Answer: D,E

Question No: 53 – (Topic 1)

What is the default console authentication method on the Cisco routers ?

1. Local

2. EAPol

3. open

4. TACACS

5. no authentication

6. RADIUS

Answer: E

Question No: 54 – (Topic 1)

What are two mechanisms that directed ARP uses to help resolve IP addresses to hardware addresses? (Choose two)

1. It removes address-resolution restrictions, allowing dynamic protocols to advertise rou information for the device loopback address.

2. It uses ICMP redirects to advertise next-hop addresses to foreign hosts

3. It uses series of ICMP echo messages to relay next-hop addresses.

4. It removes address-resolution restrictions, allowing dynamic protocols to advertise routing information for the next-hop address.

5. t uses a proxy mechanism to allow a device to respond to ARP requests for the addresses of other devices

Answer: B,D

Question No: 55 – (Topic 1)

Refer to the exhibit.

Which two statements about the output aretrue?(Choose two)

1. BFD last failed 476ms ago on interface GigabitEthernet 0/3.

2. BGP on RT1 has negotiated the BFD capability with its peer.

3. BFD is active on interface GigabitEthernet0/3 and is using ICMP.

4. BFD is active on interface GigabitEthernet0/3 and is using UDP.

5. BFD is active for BGP on RT1

Answer: B,E

Question No: 56 – (Topic 1)

What is the main difference between GETVPN and traditional IPsec encryption techniques?

1. Only GETVPN uses three types ofencryption keys.

2. Only GETVPN uses group SA.

3. Only traditional IPsec uses ISAKMP forauthentication.

4. Only traditional IPsec uses PSKs.

Answer: B

Question No: 57 DRAG DROP – (Topic 1)

Drag and drop each BGP attribute on the left into the priority order in which the attributes are preferred when determining the best path on the right.

Answer:

Question No: 58 – (Topic 1)

Refer to the exhibit. This network is undergoing a migration from PVST to MST. S1 is the MSTO root bridge and S2 is the MSTO secondary root. Which statement about traffic from S3 is true ?

1. Interface GiO/0 is blocked on S3 for VLAN40 and VLAN50 unless it is configured for load balancing with PVST .

2. Interface GiO/0 is blocked on S3 for VLAN40 and VLAN50 and load balancing fails until S3 is migrated to MST.

3. Interface GiO/1 is blocked on S3 for VLAN40 and VLAN50 and load balancing fails until S3 is migrated to MST.

4. Vlan traffic automatically load balances between GO/0 and GO/1 on S3 using migrated to MST

5. PVST inherits the load-balancing configuration from MST.

Answer: C

Question No: 59 – (Topic 1)

Which two statements about MPLS label stack encoding are true?(Choose two)

1. MPLS label are encoded in little-endian format.

2. When an MPLS label stack undergoes the swap operation,it swaps the top and bottom labels.

3. When a device forwards a labeled packet.it must copy the TTL of the incoming label to the

4. outgoing label.

5. The TTL is significant only on the top label

6. When a device forwards a labeled packet,it must copy the TTL of the outgoing label to the

top label.4

Answer: C,D

Question No: 60 – (Topic 1)

Which Cisco IOS XE component provides separation between the control plane and the data plane?

1. Common Management Enabling Technology

2. Free and Open Source Software

3. POSIX

4. Forwarding and Feature Manager

Answer: D

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