[Free] 2017(Oct) EnsurePass Testking Cisco 642-883 Dumps with VCE and PDF 21-30

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2017 Oct Cisco Official New Released 642-883
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Deploying Cisco Service Provider Network Routing (SPROUTE)

Question No: 21

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/rr38osp f.pdf

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C:\Documents and Settings\user-nwz\Desktop\1.JPG

Question No: 22

When implementing OSPF, which type of networks require DR/BDR election?

  1. point-to-point networks

  2. mutli-access broadcast networks

  3. non-broadcast multi-access networks (Hub and Spoke Frame Relay) using point-to- multipoint OSPF network type

  4. All networks type

Answer: B

Question No: 23

Refer to the Cisco IOS route map configuration exhibit.

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Which two statements are correct? (Choose two.)

  1. The match prefix-list condition is a logical OR: match prefix list PL1 OR PL2.

  2. All match conditions are logical OR: match prefix list PL1 OR PL2 OR match the APACL1 AS path access list.

  3. The three match conditions are logical AND. match prefix list PL1 AND PL2 AND match the APACL1 AS path access list.

  4. The local preference AND the metric will be set to 100 IF the route matches the PL1 OR PL2 prefix list AND the route must also match the APACL1 AS path access list.

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

Answer: A,D Explanation:

http://www.routeralley.com/ra/docs/route_maps.pdf

When match criteria is contained within a single line, a logical OR is applied.

Question No: 24

Which two methods implement high availability in OSPF on Cisco IOS XR? (Choose two.)

  1. NSF

  2. NSR

  3. BFD

  4. fast hellos

  5. sham-links

Answer: A,B

Question No: 25

Refer to the Cisco IOS-XR route policy exhibit.

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Which statement correctly describes this route policy?

  1. The pass action is required after each of the set community statements to make this route policy functional.

  2. If a route has both the 11:11 and 22:22 communities (or 44:44 and 22:22), the router adds the 55:55 community only.

  3. If a route contains the 11:11 or 44:44 community, the router adds the 55:55 community and continues. Additionally, if the same route also contains the 22:22 community, the router also adds another 77:77 community to the same route.

  4. If a route only has the 22:22 community, then no community will be added by the router.

  5. If a route only has the 11:11 or 44:44 community, then no community will be added by the router.

Answer: B

Question No: 26

Refer to the exhibit.

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R1 is advertising subnets 1.1.1.X/32 via eBGP. XR4 must accept only the first seven subnets in its BGP table. Which configuration must occur on XR2 to meet these parameters?

  1. route-policy INBOUND

    if destination in SUBNETS then pass endif

    router bgp 100 neighbor 10.10.14.1 address-family ipv4 unicast route-policy INBOUND in

  2. route-policy INBOUND

    if destination in FILTER then pass endif

    router bgp 100 neighbor 10.10.14.1 address-family ipv4 unicast route-policy INBOUND in

  3. router bgp 100

    neighbor 10.10.14.1 address-family ipv4 unicast route-policy FILTER in

  4. router bgp 100

neighbor 10.10.14.1 address-family ipv4 unicast route-policy SUBNETS in

Answer: B

Question No: 27

Which option is the minimum required configuration to enable PIM on a Cisco IOS XR router interface?

  1. router pim address-family ipv4

    interface GigabitEthernet0/0/0/0

  2. router pim

    interface GigabitEthernet0/0/0/0 address-family ipv4

    enable

  3. router pim address-family ipv4

    interface GigabitEthernet0/0/0/0 enable

  4. router pim

    interface GigabitEthernet0/0/0/0 enable

  5. router pim address-family ipv4

interface GigabitEthernet0/0/0/0 address-family ipv4

enable

Answer: D

Question No: 28

Which three statements are true regarding the OSPF router ID? (Choose three.)

  1. The OSPF routing process chooses a router ID for itself when it starts up.

  2. The router-id command is the preferred procedure to set the router ID.

  3. If a loopback interface is configured, its address will always be preferred as the router ID over any other methods.

  4. After the router ID is set, it does not change, even if the interface that the router is using for the router ID goes down. The router ID changes only if the router reloads or if the OSPF routing process restarts.

  5. In OSPF version 3, the OSPF router ID uses a 128-bit number.

Answer: A,B,D

Question No: 29

An engineer wants to define a route policy that sets MED to a given value in case the extended community attributes of a network prefix match at least one of the values: 65000:10, 65000:20, or 65000:30. Which configuration accomplishes this task?

  1. extcommunity-set rt my-list 65000:10

    65000:20

    65000:30

    end-set

    route-policy my-list ($med)

    if extcommunity rt matches-within my-list then set met $med

  2. extcommunity-set rt my-list 65000:10

    65000:20

    65000:30

    end-set

    route-policy my-list ($med)

    if extcommunity rt matches-any my-list then set met $med

  3. extcommunity-set rt my-list 65000:10

    65000:20

    65000:30

    end-set

    route-policy my-list ($med)

    if extcommunity rt matches-within my-list or med is $med is then set met $med

  4. extcommunity-set rt my-list 65000:10

65000:20

65000:30

end-set

route-policy my-list ($med)

if extcommunity rt matches-any my-list or med is $med then pass

Answer: B

Question No: 30

A network engineer cannot connect different routers by eBGP using peer groups. Which two actions establish an adjacency between both routers? (Choose two.)

  1. Ensure that the peer group statements match across all routers.

  2. Ensure that ebgp-multihop is configured.

  3. Ensure that the remote-as statement is configured with the correct peer AS.

  4. Configure a weight value that is lower than the default value of 32768.

  5. Specify the weight attribute first.

Answer: B,C

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