Cisco 642-883 Online Practice Questions and Exam Preparation

Cisco 642-883 Online Questions & Answers

• Question 71:

  Which type of ISP must rely entirely on other ISPs for Internet transit?

  A. Tier 3
  B. Tier 4
  C. Tier 2
  D. Tier 1
  A. Tier 3

• Question 72:

  A network engineer wants to set the local preference to 100 for the specific BGP community sets of 100:1, 101:1, and 102:1. Which option can the engineer use to implement this through RPL, where the BGP community set list is made by the name of lowpri-communities?

  A. route-policy ch-pref if community matches lowpri-communities then set local-preference 100 endif end-policy
  B. route-policy ch-pref if community eq lowpri-communities then set local-preference 100 endif end-policy
  C. route-policy ch-pref if community matches-any lowpri-communities then set local-preference 100 endif end-policy
  D. route-policy ch-pref if community neq lowpri-communities then set local-preference 100 endif end-policy
  C. route-policy ch-pref if community matches-any lowpri-communities then set local-preference 100 endif end-policy

• Question 73:

  Refer to the exhibit.

  

  A network engineer is asked to verify a multiarea IP IS-IS configuration before implementing it. Which statement is true?

  A. IS-type Level 1 must be configured on router B.
  B. Area addresses should be common.
  C. Wide metrics should be used only for router A.
  D. The system ID should be unique.
  B. Area addresses should be common.

• Question 74:

  A Cisco IOS XR router must be configured with BFD for OSPF. Which configuration is correct?

  A. interface GigabitEthernet0/0/0/0 ip ospf bfd
  B. router ospf 1 area 0 interface GigabitEthernet0/0/0/0 bfd fast-detect
  C. router ospf 1 area 0 interface GigabitEthernet0/0/0/0 bfd fast-detect ipv4
  D. router ospf 1 bfd all-interfaces
  B. router ospf 1 area 0 interface GigabitEthernet0/0/0/0 bfd fast-detect

• Question 75:

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

  A. By default, a single SPF is used for both IPv4 and IPv6, so the IPv4 and IPv6 topology should be the same.
  B. By default, the IS-IS router type is Level 1 and Level 2.
  C. All IS-IS routers within the same IS-IS area must be configured with the same IS-IS routing process instance ID.
  D. By default, metric-style narrow is used.
  E. By default, the IS-IS interface circuit type is Level 1 and Level 2.
  F. The area IS-IS address-family configuration command is used to specify the IS-IS area address.
  B. By default, the IS-IS router type is Level 1 and Level 2.
  D. By default, metric-style narrow is used.
  E. By default, the IS-IS interface circuit type is Level 1 and Level 2.

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

  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.

  

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

• Question 76:

  Refer to the exhibit.

  

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

  A. route-policy INBOUND if destination in FILTER then pass endifrouter bgp 100 neighbor 10.10.14.1 address-family ipv4 unicastroute-policy INBOUND in
  B. router bgp 100neighbor 10.10.14.1 address-family ipv4 unicastroute-policy FILTER in
  C. router bgp 100neighbor 10.10.14.1 address-family ipv4 unicastroute-policy SUBNETS in
  D. route-policy INBOUNDif destination in SUBNETS thenpass endifrouter bgp 100 neighbor 10.10.14.1 address-family ipv4 unicastroute-policy INBOUND in
  A. route-policy INBOUND if destination in FILTER then pass endifrouter bgp 100 neighbor 10.10.14.1 address-family ipv4 unicastroute-policy INBOUND in

• Question 77:

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

  A. IP multicast routes are not supported.
  B. Outbound route filtering is configured only on a per-address family basis.
  C. Outbound route filtering can be configured for either iBGP or eBGP sessions.
  D. The outbound route filter can be defined in a Prefix list, Distribute list or Access lists.
  E. Outbound route filtering is more effective when a distance vector IGP is used.
  A. IP multicast routes are not supported.
  B. Outbound route filtering is configured only on a per-address family basis.

  ---

  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.

• Question 78:

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

  A. The OSPF routing process chooses a router ID for itself when it starts up.
  B. The router-id command is the preferred procedure to set the router ID.
  C. If a loopback interface is configured, its address will always be preferred as the router ID over any other methods.
  D. 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.
  E. In OSPF version 3, the OSPF router ID uses a 128-bit number.
  A. The OSPF routing process chooses a router ID for itself when it starts up.
  B. The router-id command is the preferred procedure to set the router ID.
  D. 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.

• Question 79:

  Which configuration implements the most secured OSPF authentication mode on Cisco IOS XE?

  A. interface Gi0/0/0/0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco
  B. router ospf 1 area 1 authentication message-digest interface GigabitEthernet0/0/0/0 message-digest-key 1 md5 cisco
  C. router ospf 1 area 1 interface GigabitEthernet0/0/0/0 authentication message-digest message-digest-key 1 md5 cisco
  D. router ospf 1 area 1 authentication interface GigabitEthernet0/0/0/0 ip ospf authentication-key cisco
  E. interface Gi0/0/0/0 ip ospf authentication ip ospf authentication-key cisco
  A. interface Gi0/0/0/0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco

• Question 80:

  A network engineer must secure every BGP session within the autonomous system by enabling MD5 authentication. Which command implements authentication on network devices that run regular Cisco IOS?

  A. password encryptedpassword
  B. neighboripv4_addresspasswordpassword
  C. service password-encryption
  D. key chain md5
  B. neighboripv4_addresspasswordpassword