Question 1

Refer to the exhibit.

A network engineer configured routers R1 and R5 to run in IS-IS Level 1 mode and router R6 to run in IS-IS Level 2 mode. All other routers are running as Level 1 / Level 2 routers. An engineer expects traffic from R1 to R6 to pass via R2, but IS-IS routing has calculated the best path via R4. Which action corrects the problem?

Options :

A : Configure all routers as Level 1 routers.

B :

Remove the link metric for the link from router R1 to router R2.

C : Change the link metric for the link from router R1 to router R2 to 1.

D : Configure all routers as Level 1 / Level 2 routers.

Answer: C

Question 2

What is the difference between basic IS-IS and OSPF packet types?

Options :

A : IS-IS and OSPF use area packets, but only IS-IS uses sequence number packets.

B : IS-IS and OSPF use link-state update packets, but only OSPF uses link-state ACK packets.

C : IS-IS and OSPF use Hello packets, but only OSPF uses DBD packets.

D : IS-IS and OSPF use link-state update packets, but only IS-IS uses DBD packets.

Answer: C

Question 3

Refer to the exhibit.

Why is neighbor 10.1.5.5 stuck in “2WAY” state?

Options :

A : Router ID 10.1.5.5 is not reachable from R2

B : OSPF authentication has failed between R2 and 10.1.5.5

C : It is an expected behavior when OSPF network type is broadcast

D : OSPF parameters (Area ID or hello interval) are mismatched between R2 and 10.1.5.5

Answer: C

Question 4

Refer to the exhibit.

An MPLS core network has connectivity issues R4 has failed. It impacts traffic loss between R1 and R8. Customers report no access to their file servers, which delays their transformation work. Which quick action resolves the issue until R4 recovers?

Options :

A : Implement Link and Node protection on routers R2 and R7.

B : Disable traffic engineering so that traffic prefers the IGP path

C : Enable MPLS TE fast reroute on router R1 and Link and Node protection on router R2.

D : Configure IBGP full mesh for faster convergence.

Answer: C

Question 5

The engineering team at ISP_1 must improve network stability time and minimize the impact of routing instabilities from other domains to unicast transit services in the backbone R1 is part of an OSPF- enabled network, and acts as an ASBR connected via interface GiO to the external domain The OSPF exponential backoff algorithm RFC 3623 with helper mode is already implemented on R1 Which additional configuration must the ISP_1 team apply to suppress routing instability for 3 minutes'?

Options :

A : Configure ip ospf resync-timtout 180 under the Gi0'1 interface configuration

B : Configure ip ospf timer nsf interval 3 under the global Gi0'1 interface configuration

C : Configure nsf ittf restart-inttrval 180 under the global OSPF configuration

D : Configure nsf ospf wait 3 under the global OSPF configuration

Answer: A