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NEW QUESTION 1
Refer to the partial Cisco IOS XR BGP configuration exhibit.
640-878 dumps exhibit
Which two statements are true? (Choose two)

  • A. This router uses its Loopback 0 interface IP address when establishing BGP peering with the 10.2.1.1 router.
  • B. This router uses its Loopback 0 interface IP address when establishing BGP peering with the 192.168.101.11 router.
  • C. Test1 refers to a route policy that is defined using the RPL.
  • D. Both the IBGP and EBGP sessions will be authenticated.
  • E. The IBGP session is missing the mandatory route-policy configuration.

Answer: AC

NEW QUESTION 2
Which two statements about the BGP weight attribute on Cisco routers are true? (Choose two.)

  • A. It is a well-known discretionary attribute.
  • B. It is only locally significant.
  • C. Routes with higher weight are the preferred routes.
  • D. It is used to influence the inbound traffic from the upstream AS.
  • E. It is set to 100 by default.

Answer: BC

NEW QUESTION 3
Which procedure is used as the last resort disaster recovery procedure to completely replace the currently installed IOS XR software on Cisco IOS XR routers?

  • A. netboot
  • B. turboboot
  • C. install recovery
  • D. install rollback
  • E. install add and install activate

Answer: B

Explanation: http://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.0/migration/guide/tbupgapp.pdf

NEW QUESTION 4
What is dual IOS mode on the Cisco ASR 1001 Router?

  • A. redundant IOS processes that are running on the active RP and standby RP
  • B. active and standby IOS processes that are running on a single RP
  • C. separate Cisco IOS XE and IOS XR processes that are running on a single RP
  • D. separate Cisco IOS XE and IOS XR processes that are running on two different RPs
  • E. checkpointed redundant IOS processes that are running on two different RPs in active/active mode

Answer: B

Explanation:
640-878 dumps exhibit

NEW QUESTION 5
Select and Place:
640-878 dumps exhibit

    Answer:

    Explanation: 640-878 dumps exhibit

    NEW QUESTION 6
    On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0 interface that has an IPv4 IP address of 192.168.1.1/24?

    • A. router ospf 1network 192.168.1.1 0.0.0.0 area 0
    • B. router ospf 1network 192.168.1.1 255.255.255.255 area 0
    • C. router ospf 1 area 0interface gi0/0/0/0
    • D. router ospfv3 1network 192.168.1.1 0.0.0.0 area 0
    • E. router ospfv3 1network 192.168.1.1 255.255.255.255 area 0
    • F. router ospfv3 1 area 0network 192.168.1.0
    • G. router ospfv3 1 area 0interface gi0/0/0/0

    Answer: C

    NEW QUESTION 7
    Your switch network has been configured to support multiple VLANs. In order for the users on one VLAN to communicate with users on another VLAN, which additional configuration is required?

    • A. Enable a routing protocol like EIGRP on a router or on a Layer 3 capable switch
    • B. Enable inter-VLAN routing on a router or on a Layer 3 capable switch
    • C. Enable a switch virtual interface on the router, using the interface vlan global configuration command
    • D. Enable a switch virtual interface on the switch, using the encapsulation dot1q
    • E. subinterface configuration command
    • F. Enable IP routing on a Layer 2 switch

    Answer: B

    NEW QUESTION 8
    A network engineer is trying to determine the mac address of a server attached to a switchport on a Cisco Catalyst 6500 Switch. The interface is connected, but no MAC address is present. The server has an IP address of 169.x.x.x. At which layer of the OSI Model does the problem exist?

    • A. Layer 1
    • B. Layer 2
    • C. Layer 3
    • D. Layer 4
    • E. Layer 5
    • F. Layer 6
    • G. Layer 7

    Answer: A

    NEW QUESTION 9
    Which command configures a switchport to connect only a host device in VLAN 301?

    • A. switchport access vlan 301
    • B. switchport mode trunk vlan 301
    • C. switchport mode access vlan 301
    • D. switchport vlan 301

    Answer: A

    NEW QUESTION 10
    Which IPv6 address block is reserved for 6to4 tunneling?

    • A. 2000::/16
    • B. 2001::/16
    • C. 2002::/16
    • D. 3ffe::/16
    • E. fe80::/16

    Answer: C

    Explanation: http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-tunnel.html#wp1055738
    Prerequisites
    With 6to4 tunnels, the tunnel destination is determined by the border router IPv4 address, which is concatenated to the prefix 2002::/16 in the format 2002:border- router-IPv4-address::/48. The border router at each end of a 6to4 tunnel must support both the IPv4 and IPv6 protocol stacks.
    Restrictions
    The configuration of only one IPv4-compatible tunnel and one 6to4 IPv6 tunnel is supported on a router. If you choose to configure both of those tunnel types on the same router, we strongly recommend that they do not share the same tunnel source. The reason that a 6to4 tunnel and an IPv4-compatible tunnel cannot share an interface is that both of them are NBMA "point-to-multipoint" access links and only the tunnel source can be used to reorder the packets from a multiplexed packet stream into a single packet stream for an incoming interface. So when a packet with an IPv4 protocol type of 41 arrives on an interface, that packet is mapped to an IPv6 tunnel interface based on the IPv4 address. However, if both the 6to4 tunnel and the IPv4-compatible tunnel share the same source interface, the router is not able to determine the IPv6 tunnel interface to which it should assign the incoming packet. IPv6 manually configured tunnels can share the same source interface because a manual tunnel is a "point-topoint" link, and both the IPv4 source and IPv4 destination of the tunnel are defined.

    NEW QUESTION 11
    Which three statements about OSPFv2 or OSPFv3 authentication are true? (Choose three.)

    • A. On Cisco IOS XR platforms, OSPFv3 authentication can be configured at the OSPF routing process, area, or interface level.
    • B. OSPF authentication on Cisco IOS and IOS XE platforms can be configured per area or per interface.
    • C. On Cisco IOS and IOS XE and IOS XR platforms, the authentication key can only be configured per interface.
    • D. OSPFv3 uses IPsec for authentication and encryption.
    • E. On Cisco IOS XR platforms, the OSPF authentication that is configured for the area overrides the authentication that is configured for the interface.
    • F. On Cisco IOS and IOS XE platforms, the two OSPFv2 authentication methods that are supported are MD5 and SHA1.

    Answer: ABD

    Explanation: http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/routing/configuration/guide/rc37ospf.html

    NEW QUESTION 12
    Cisco IP NGN service providers can offer multiple services to their customers by using which type of technology in their core networks?

    • A. ATM
    • B. SONET/SDH
    • C. Frame Relay
    • D. IP/MPLS
    • E. PBB

    Answer: D

    NEW QUESTION 13
    Which three are correct statements based on the BGP configuration below? (Choose three.)
    Router#config t Router(config)#router bgp 1
    Router(config-router)#neighbor 1.1.1.1 remote-as 1
    Router(config-router)#neighbor 3.3.3.3 remote-as 2

    • A. local AS is 1
    • B. local AS is 2
    • C. neighbor 1.1.1.1 remote-as 1 is iBGP peer
    • D. neighbor 1.1.1.1 remote-as 1 is eBGP peer
    • E. neighbor 3.3.3.3 remote-as 2 is iBGP peer
    • F. neighbor 3.3.3.3 remote-as 2 is eBGP peer
    • G. neighbor 2.2.2.2 remote-as 2 is iBGP peer
    • H. neighbor 2.2.2.2 remote-as 2 is eBGP peer

    Answer: ACF

    NEW QUESTION 14
    Select and Place:
    640-878 dumps exhibit

      Answer:

      Explanation: 640-878 dumps exhibit

      NEW QUESTION 15
      Which three are common ISP access network technologies? (Choose three.)

      • A. DSL
      • B. Cable modem
      • C. DWDM
      • D. MPLS
      • E. PON
      • F. MP-BGP

      Answer: ABE

      Explanation: http://blog.ioshints.info/2010/02/passive-optical-networks.html- PON

      NEW QUESTION 16
      Which two protocols are most often deployed in Cisco IP NGN multiservices core networks to support services like VPNs? (Choose two.)

      • A. MPLS
      • B. GRE
      • C. mGRE
      • D. SSL
      • E. VTI
      • F. multiprotocol BGP

      Answer: AF

      NEW QUESTION 17
      What is a requirement for performing Cisco IOS ISSU on the Cisco IOS XE-based ASR 1006 and ASR 1013 routers?

      • A. must use consolidated package mode
      • B. must use subpackage mode
      • C. must have redundant RPs
      • D. must have owner and nonowner SDRs

      Answer: C

      Explanation:
      640-878 dumps exhibit

      NEW QUESTION 18
      You are enabling OSPF on a router and notice that all the Fast Ethernet and the Gigabit Ethernet interfaces have the same OSPF cost of 1. Which single configuration change can you make in router ospf configuration mode so that the Fast Ethernet interfaces have a higher OSPF cost than the Gigabit Ethernet interfaces?

      • A. Change the OSPF interface cost globally.
      • B. Change the OSPF default metric.
      • C. Change the OSPF auto-cost reference bandwidth.
      • D. Change the OSPF administrative distance.
      • E. Change the OSPF metric type from E2 to E1.

      Answer: C

      Explanation:
      http://ccietobe.blogspot.com/2008/06/ospf-auto-cost-reference-bandwidth_02.html

      NEW QUESTION 19
      Which of the following commands would be used to prevent a switchport from processing Bridge Protocol Data Units?

      • A. switch(config)#bpdu filter enable
      • B. switch(config)#no bpdu enable
      • C. switch(config-if)#spanning-tree bpdufilter enable
      • D. switch(config-if)#no spanning-tree bpdu filter enable
      • E. switch(config-if)#spanning-tree bpdu guard

      Answer: C

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