Question 1

Customer XYZ network consists of an MPLS core. IS-IS running as IGP a pair of BGP route reflectors for route propagation, and a few dozens of MPLS-TE tunnels for specific tactical traffic engineering requirements. The customer's engineering department has some questions about the use of the Overload Bit in the IS-IS networks and how it could be used to improve their current network design. Which two concepts about the Overload Bit are true? (Choose two.)

Options :

A : It can be set on a router during the startup process for a fixed period of time

B : Networks advertised within the LSPs of the respective node will become unreachable

C : It forces the midpoint MPLS-TE node to reoptimize the primary tunnels going through the OL node.

D : It can be set on a router until other interacting protocols have signaled convergence.

E : It is not recommended on BGP Route Reflectors

Answer: A,D

Question 2

When designing large EIGRP networks, what is the benefit of route summarization when there are multiple paths to the same destination?

Options :

A : It is a way to discard unwanted routes.

B : It is a feature used to loadbalance traffic across multiple link.

C : It is a feature used to preventrouting loops.

D : It is used to reduce the EIGRP querying domain to create stability and faster convergence.

Answer: D

Question 3

A key to maintaining a highly available network is building in the appropriate redundancy to protect against failure. This redundancy is carefully balanced with the inherent complexity of redundant systems. Which design consideration is relevant for enterprise WAN use cases when it comes to resiliency?

Options :

A : Design in a way that expects outages and attacks on the network and its protected resources

B : The design approach should consider simple and centralized management aspect

C : Design in a way that it simplifies and improves ease of deployment

D : Design automation tools wherever it is appropriate for greater visibility

Answer: A

Question 4

The BGP table contains hundreds of thousands of routes. Which design technique improves the convergence time?

Options :

A : Enable TCP path MTU discovery to every neighbor

B : Use TCP ports higher than 1024 for your BGP sessions

C : Deploy BGP route reflectors instead of full-mesh iBGP

D : Deploy BGP confederations within your backbone

Answer: C

Question 5

Refer to the exhibit.

An engineer is designing the network for a multihomed customer running in AS 111 does not have any other

Ass connected to it. Which technology is more comprehensive to use in the design to make sure that the AS is

not being used as a transit AS?

Options :

A :

Configure the AS-set attribute to allow only routes from AS 111 to be propagated to the neighbor ASs.

B :

Use the local preference attribute to configure your AS as a non-transit'' AS.

C :

include an AS path access list to send routes to the neighboring ASs that only have AS 111 in the AS

path field.

D :

Include a prefix list to only receive routes from neighboring ASs.

Answer: C

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