Download New Updated (July) Cisco 400-101 Actual Test 261-270

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QUESTION 261

Which two OSPF LSA types are flooded within the originating area? (Choose two.)

 

A.

type 1, Router LSA

B.

type 2, Network LSA

C.

type 3, Network Summary LSA

D.

type 4, ASBR Summary LSA

E.

type 6, Group Membership LSA

F.

type 9, Opaque LSA

 

Correct Answer: AB

Explanation:

OSPF relies on several types of Link State Advertisements (LSAs) to communicate link state information between neighbors. A brief review of the most applicable LSA types:

LSA types 1 and 2 are found in all areas, and are never flooded outside of an area. They are only flooded within the area that they originated from.

Reference: http://packetlife.net/blog/2008/jun/24/ospf-area-types/

 

 

QUESTION 262

Which statement about the OSPF Loop-Free Alternate feature is true?

 

A.

It is supported on routers that are configured with virtual links.

B.

It is supported in VRF OSPF instances.

C.

It is supported when a traffic engineering tunnel interface is protected.

D.

It is supported when traffic can be redirected to a primary neighbor.

 

Correct Answer: B

Explanation:

< span lang="EN-US" style="font-family: ; mso-font-kerning: 0pt; mso-no-proof: yes">Restrictions for OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-3s/iro-xe-3s-book/iro-ipfrr-lfa.html

QUESTION 263

Refer to the exhibit. ASN 64523 has a multihomed BGP setup to ISP A and ISP B. Which BGP attribute can you set to allow traffic that originates in ASN 64523 to exit the ASN through ISP B?

 

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A.

origin

B.

next-hop

C.

weight

D.

multi-exit discriminator

 

Correct Answer: D

Explanation:

MED is an option
al nontransitive attribute. MED is a hint to external neighbors about the preferred path into an autonomous system (AS) that has multiple entry points. The MED is also known as the external metric of a route. A lower MED value is preferred over a higher value.

Example at reference link below:

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13759-37.html

 

 

QUESTION 264

When deploying redundant route reflectors in BGP, which attribute can you configure on the route reflector to allow routes to be identified as belonging to the same group?

 

A.

ROUTER_ID

B.

CLUSTER_ID

C.

ORIGINATOR_ID

D.

PEER_GROUP

 

Correct Answer: B

Explanation:

Together, a route reflector and its clients for
m a cluster. When a single route reflector is deployed in a cluster, the cluster is identified by the router ID of the route reflector. The bgp cluster-id command is used to assign a cluster ID to a route reflector when the cluster has one or more route reflectors. Multiple route reflectors are deployed in a cluster to increase redundancy and avoid a single point of failure. When multiple route reflectors are configured in a cluster, the same cluster ID is assigned to all route reflectors. This allows all route reflectors in the cluster to recognize updates from peers in the same cluster and reduces the number of updates that need to be stored in BGP routing tables.

Reference: http://ieoc.com/forums/t/5326.aspx

 

 

QUESTION 265

Which two options are mandatory components of a multiprotocol BGP VPN-IPv4 address? (Choose two.)

 

A.

a route distinguisher

B.

an IPv4 address

C.

a route target

D.

an MPLS label

E.

a system ID

F.

an area ID

 

Correct Answer: AB

Explanation:

The IP prefix is a member of the IPv4 address family. After the PE device learns the IP prefix, the PE converts it into a VPN-IPv4 prefix by combining it with an 8-byte route distinguisher (RD). The generated prefix is a member of the VPN-IPv4 address family. It uniquely identifies the customer address, even if the customer site is using globally nonunique (unregistered private) IP addresses. The route distinguisher used to generate the VPN-IPv4 prefix is specified by a configuration command associated with the virtual routing and forwarding (VRF) instance on the PE device.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_l3_vpns/configuration/15-mt/mp-l3-vpns-15-mt-book/mp-bgp-mpls-vpn.html

 

 

QUESTION 266

Which BGP feature enables you to install a backup path in the forwarding table?

 

A.

soft reconfiguration

B.

prefix independent convergence

C.

route refresh

D.

< font style="font-size: 10pt" color="#000000">synchronization

 

Correct Answer: B

Explanation:

To install a backup path into the forwarding table and provide prefix independent convergence (PIC) in case of a PE-CE link failure, use the additional-paths install backup command in an appropriate address family configuration mode. To prevent installing the backup path, use the no form of this command. To disable prefix independent convergence, use the disable keyword. Reference: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/routing/command/reference/b_routing_cr42crs/b_routing_cr42crs_chapter_01.html

 

 

 

 

 

 

 

 

QUESTION 267

Refer to the exhibit. R1 and R2 have a working VRF-Lite configuration, but R1 is receiving a route only to 10.2.2.2 from R2. Which two changes can you make so that R1 receives all routes from R2? (Choose two.)

 

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A.

Create an additional permit statement in the access list that is referenced by the import-map on R1.

B.

Disable VRF filtering on R1.

C.

Set the R1 and R2 OSPF process IDs to match.

D.

Change the wildcard mask for the network 10.3.3.0 to 0.0.0.0.

E.

Create a matching export map in the VRF for R2.

 

Correct Answer: AB

Explanation:

The access list in this example is only allowing the 192.168.0.0/16 and 10.2.2.2/32 routes to be advertised, so an additional permit statement is needed to allow the other routes. Alternatively, we could simply disable VRF filtering, then all routes would be advertised.

QUESTION 268

Refer to the exhibit. R2 is unable to access the 172.16.1.0/30 network between R1 and R3. Which option is a possible reason for the failure?

 

clip_image006

 

A.< /p>

The seed metric for redistributing into RIP on R3 is missing.

B.

The OSPF processes on R2 and R3 are different.

C.

Auto-summary is misconfigured under the RIP process of R3.

D.

The subnet mask on the link between R2 and R3 is smaller than /30.

E.

The wildcard mask on R3 is misconfigured.

 

Correct Answer: A

Explanation:

The problem is that RIP requires a seed metric to be specified when redistributing routes into that protocol. A seed metric is a “starter metric” that gives the RIP process a metric it can work with. The OSPF metric of cost is incomprehensible to RIP, since RIP’s sole metric is hop count.

Reference: http://www.thebryantadvantage.com/CCNP%20Certification%20BSCI%20Exam%20Tutorial%20Route%20Redistribution%20Seed%20Metric.htm

 

 

 

 

 

 

 

 

QUESTION 269

DRAG DROP

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Correct Answer:

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QUESTION 270

DRAG DROP

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Correct Answer:

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