Free Cisco 642-883 Exam Dumps Questions & Answers

Refer to the exhibit.

XR4 must be configured to advertise only AS 100 local subnets to AS 10. Which configuration on XR4 achieves this goal?

• A.  as-path-set LOCAL
  ios-regex ^$
  route-policy ADV
  if as-path in LOCAL then pass endif
• B.  as-path-set LOCAL
  ios-regex '^$'
  route-policy ADV
  if as-path in LOCAL then pass endif
• C.  as-path-set LOCAL
  ios-regex ^100$
  route-policy ADV
  if as-path in LOCAL then pass endif
• D.  as-path-set LOCAL
  ios-regex '^100$'
  route-policy ADV
  if as-path in LOCAL then pass endif

An engineer wants to use an address family to configure internal BGP peer 10.1.1.1 as a route reflector client for unicast and multicast prefixes. Which option accomplishes this configuration?

• A.  router bgp 140
  address-family ipv4 unicast
  neighbor 10.1.1.1
  remote-as 150
  address-family ipv4 unicast
  route-reflector-client
  exit
  address-family ipv4 multicast
  route-reflector-client
• B.  router bgp 140
  neighbor 10.1.1.1
  address-family ipv4 unicast
  address-family ipv4 multicast
  remote-as 150
  route-reflector-client
  exit
• C.  router bgp 140
  address-family ipv4 unicast
  route-reflector-client
  address-family ipv4 multicast
  remote-as 140
  neighbor 10.1.1.1
• D.  router bgp 140
  address-family ipv4 unicast
  neighbor 10.1.1.1
  remote-as 140
  address-family ipv4 unicast
  route-reflector-client
  exit
  address-family ipv4 multicast
  route-reflector-client

When configuring BGP on Cisco IOS XR Software, which address-family is enabled by default?

• A.  IPv4 unicast
• B.  IPv4 unicast and IPv6 unicast
• C.  IPv4 unicast and IPv6 unicast and VPNv4
• D.  IPv6 unicast
• E.  No address-family is enabled by default.
• F.  VPNv4

A customer is concerned about rerouting attacks on the IS-IS domain spanning the company. Which keychain management configuration is valid to authenticate IS-IS link- state information and provide a first response to this type of attack for Cisco IOS XR instances?

• A.  configurekey chain isis-keyskey 1key-string myP@ssw0rdcryptographic-algorithm MD5send-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1Isp-password keychain isis-keys
• B.  key chain cisco-xrkey 10key-string myP@ssw0rd!interface GigabitEthernet 3/1/1ip addressip_address subnet_maskip router isisisis authentication mode md5 level-1isis authentication key-chain cisco-xr level-1
• C.  configurekey chain isis-keyskey-string myP@ssw0rdsend-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1isp-password keychain isis-keys
• D.  configurekey chain isis-keys!key 8cryptographic- algorithm MD5send-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1isp-password keychainisis-keys

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

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