[Free] 2019(Nov) EnsurePass Cisco 642-883 Dumps with VCE and PDF 61-70

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Question No.61

Which two mandatory tasks must an IS-IS NSF-capable router perform for RP switchover? (Choose two.)

  1. Relearn the available IS-IS neighbors.

  2. Reacquire the contents of the LSD.

  3. Reset peering with the available IS-IS neighbors.

  4. Keep the existing contents of the LSD.

  5. Rediscover DIS for each link segment.

Answer: AB

Question No.62

A network engineer wants to set the local preference to 100 for the community set list lowpri- communities. Which option can the engineer use to implement this through RPL?

  1. route-policy ch-prefif community neq lowpri-communities then set local-preference 100 endifend-policy

  2. route-policy ch-prefif community matches any lowpri-communities then set local-preference 100

    endifend-policy

  3. route-policy ch-prefif community matches lowpri-communities then set local-preference 100 endifend-policy

  4. route-policy ch-prefif community matches eq lowpri-communities then set local-preference 100

endifend-policy

Answer: B

Question No.63

Refer to the exhibit. The route-map shown in the exhibit is applied to updates received from a BGP neighbor. Which two statements are correct regarding the Cisco IOS route map configuration? (Choose two.) (Missing image)

  1. The local preference will be set to 200 AND the metric will be set to 1000 IF the route matches the PL1 OR PL2 prefix list AND the route also matches the AS path 1 access list.

  2. The three match conditions are logical AND: match prefix list PL1 AND PL2 AND match the AS path 1 access list.In AS

  3. The match prefix-list condition isa logical OR: match prefix list PL1 OR PL2.

  4. All routes that are not matched by the sequence 10 route map statement will be dropped.

  5. All match conditions are logical OR: match prefix list PL1 OR PL2 OR match the AS path 1 access list.

Answer: AB

Question No.64

When monitoring the OSPF operations in the network, you notice that the OSPF process is not load balancing traffic across multiple OSPF links. Which configuration adjustment could be made to enable the OSPF process to load balance traffic across multiple OSPF links?

  1. Enable BFD on the OSPF interfaces and on the OSPF routing process.

  2. Enable NSR on the OSPF routing process.

  3. Enable NSF on the OSPF routing process.

  4. Adjust the OSPF cost on the OSPF interfaces.

  5. Adjust the OSPF variance parameter.

  6. Use the wide-style OSPF metric instead of the narrow-style OSPF metric.

Answer: D

Question No.65

What is function of the RP/0/RSP0/CPU0:PE1(config-ospf)#distance Cisco IOS-XR command?

  1. To modify the administrative distance of the OSPF routes

  2. To modify the default seed metric of the OSPF external routes

  3. To modify the OSPF default reference bandwidth

  4. To modify the OSPF cost

Answer: A

Explanation:

http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/routing/command/reference/rr38ospf.pdf

image

Question No.66

Which two statements regarding OSPFv2 or OSPFv3 authentication are correct? (Choose two.)

  1. OSPFv2 supports MD5 authentication.

  2. OSPFv2 supports MD5 or SHA authentication.

  3. OSPFv2 relies on the native security stack that uses IPsec.

  4. OSPFv3 supports MD5 authentication.

  5. OSPFv3 supports MD5 or SHA authentication.

  6. OSPFv3 relies on the native security stack that uses IPsec.

Answer: AF

Question No.67

Which two options are characteristics of Nonstop Forwarding and Nonstop routing? (Choose two.)

  1. NSR is graceful redundancy mechanism.

  2. NSR is stateful redundancy mechanism.

  3. NSF is stateful redundancy mechanism.

  4. NSF is graceful redundancy mechanism.

Answer: BD

Question No.68

When configuring IPv4 and IPv6 IS-IS routing on Cisco IOS XR routers, which three statements are correct? (Choose three.)

  1. By default, a single SPF is used for both IPv4 and IPv6, so the IPv4 and IPv6 topology should be the same.

  2. By default, the IS-IS router type is Level 1 and Level 2.

  3. All IS-IS routers within the same IS-IS area must be configured with the same IS-IS routing process instance ID.

  4. By default, metric-style narrow is used.

  5. By default, the IS-IS interface circuit type is Level 1 and Level 2.

  6. The area IS-IS address-family configuration command is used to specify the IS-IS area address.

Answer: BDE

Explanation:

image

The default metric style for single topology is narrow metrics. However, you can use either wide metrics or narrow metrics. How to configure them depends upon how single-topology is configured. If both IPv4 and IPv6 are enabled and single-topology is configured, the metric style is configured in the address-family ipv4 stanza. You may configure the metric style in the address-family ipv6 stanza, but it will be ignored in this case. If IPv6 only is enabled and single topology is configured, then the metric style is configured in the address-family ipv6 stanza.

image

Question No.69

Which option is a tool that is used to ensure that BGP AS does not become a transit AS?

  1. as-path filter-list

  2. local-preference

  3. ttl-security

  4. confederations

Answer: A

Question No.70

Which two of the following are true regarding the BGP Prefix-Based outbound route filtering feature? (Choose two.)

  1. IP multicast routes are not supported.

  2. Outbound route filtering is configured only on a per-address family basis.

  3. Outbound route filtering can be configured for either iBGP or eBGP sessions.

  4. The outbound route filter can be defined in a Prefix list, Distribute list or Access lists.

  5. Outbound route filtering is more effective when a distance vector IGP is used.

Answer: AB

Explanation:

http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fsbgporf.pdf

Restrictions for BGP Prefix-Based Outbound Route Filtering

The BGP Prefix-Based Outbound Route Filtering feature does not support IP multicast routes. IP addresses that are used for outbound route filtering must be defined in an IP prefix-list. BGP distribute lists and IP access lists are not supported.

Outbound route filtering is configured on only a per-address family basis and cannot be configured under the general session or BGP routing process (Router(config-router)#). Outbound route filtering is configured for only external peering sessions.

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