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NEW QUESTION 1
What does the command 'rep admin vlan 100' accomplish?

  • A. confines flooding of REP messages to VLAN 100
  • B. reserves REP admin VLAN to 100 so that no REP messages are sent on VLAN 100
  • C. forces VLAN 100 into a REP block state
  • D. this is an invalid command

Answer: A

NEW QUESTION 2
Which number range is allocated to private Autonomous Systems by the Internet Assigned Numbers Authority?

  • A. 65535 to 65545
  • B. 64535 to 64536
  • C. 64512 to 65535
  • D. 65535 to 66001
  • E. 63512 to 64535

Answer: C

NEW QUESTION 3
Select and Place:
640-878 dumps exhibit

    Answer:

    Explanation:
    Place the options in order from top to bottom: designated
    backup root alternate

    NEW QUESTION 4
    Refer to the configuration snippet below. A new IOS-XR router is being added to the network. What command is required to enable the Label Distribution Protocol on interface GigabitEthernet 0/3/0/0?
    Configuration: mpls ldp
    router-id 209.165.200.226

    • A. interface GigabitEthernet0/3/0/0
    • B. mpls ldpinterface GigabitEthernet0/3/0/0
    • C. interface GigabitEthernet0/3/0/0 ldp enable
    • D. ldpinterface GigabitEthernet0/3/0/0

    Answer: B

    NEW QUESTION 5
    When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

    • A. to copy the consolidated Cisco IOS XE image to the bootflash:
    • B. to perform Cisco IOS ISSU on the standby route processor
    • C. to run the router using a consolidated package
    • D. to run the router using individual subpackages

    Answer: D

    Explanation: http://www.cisco.com/en/US/docs/routers/asr1000/configuration/guide/chassis/asrswcfg.pdf
    640-878 dumps exhibit

    NEW QUESTION 6
    Refer to the Cisco IOS XR commands exhibit.
    640-878 dumps exhibit
    The router administrator is trying to activate a software package on the router but is not able to do so. Which statement about this problem is true?

    • A. The router needs to be in the global configuration mode.
    • B. The router needs to be in the admin global configuration mode.
    • C. The router needs to be in the admin EXEC mode.
    • D. The install activate command is not the correct command to use.
    • E. The administrator needs to log in as the "root" user instead of the "admin" user.

    Answer: C

    Explanation: http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r2.0/getting_started/installation/guide/gs_pack. pdf
    640-878 dumps exhibit

    NEW QUESTION 7
    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 8
    On Cisco IOS-XR, which command is used to review previous configuration events committed on the router?

    • A. show configuration history
    • B. show configuration commit changes
    • C. show configuration commit list
    • D. show configuration commit failed

    Answer: C

    NEW QUESTION 9
    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 10
    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 11
    Which two statements about NAT64 are true? (Choose two.)

    • A. NAT64 packets traverse two IPv4 addressing domains.
    • B. NAT64 packets are translated two times.
    • C. There are two types of NAT64 (stateful or stateless).
    • D. NAT is performed by the CPE and also by the service provider edge router.
    • E. The DNS64 server embeds the IPv4 address from the DNS A record with a preconfigured IPv6 translation prefix.

    Answer: CE

    Explanation: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6553/white_paper_c11- 676278.html
    All viable translation scenarios are supported by NAT64, and therefore NAT64 is becoming the most sought translation technology. AFT using NAT64 technology can be achieved by either stateless or stateful means:
    · Stateless NAT64, defined in RFC 6145, is a translation mechanism for algorithmically mapping IPv6 addresses to IPv4 addresses, and IPv4 addresses to IPv6 addresses. Like NAT44, it does not maintain any bindings or session state while performing translation, and it supports both IPv6- initiated and IPv4-initiated communications.
    · Stateful NAT64, defined in RFC 6146, is a stateful translation mechanism for translating IPv6 addresses to IPv4 addresses, and IPv4 addresses to IPv6 addresses. Like NAT44, it is called stateful because it creates or modifies bindings or session state while performing translation. It supports both IPv6-initiated and IPv4-initiated communications using static or manual mappings. DNS64, an optional component defined in RFC 6147, when used in conjunction with NAT64, would trick the IPv6 hosts into thinking that the IPv4 destination as an IPv6 address, by synthesizing AAAA (quad A) resource records from A resource records.

    NEW QUESTION 12
    Refer to the exhibit.
    640-878 dumps exhibit
    The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which four packets that are sourced from 10.1.1.1 TCP port 1060, if they are routed to the Gi0/0/0/0 interface, will be permitted? (Choose four)

    • A. destination IP address: 192.168.15.37, destination TCP port: 8080
    • B. destination IP address: 192.168.15.41, destination TCP port: 8080
    • C. destination IP address: 192.168.15.49, destination TCP port: 8080
    • D. destination IP address: 192.168.15.36, destination TCP port: 80
    • E. destination IP address: 192.168.15.46, destination TCP port: 80
    • F. destination IP address: 192.168.15.49, destination TCP port: 80

    Answer: CDEF

    NEW QUESTION 13
    Which spanning-tree mode uses the name command to configure a region name?

    • A. MST
    • B. PVST+
    • C. PVRST+
    • D. RSTP

    Answer: A

    NEW QUESTION 14
    Which Cisco IOS access list permits HTTP traffic that is sourced from host 10.1.129.100 port 3030 and that is destined to host 192.168.1.10?

    • A. access-list 101 permit tcp any eq 3030
    • B. access-list 101 permit tcp 10.1.128.0 0.0.1.255 eq 3030 192.168.1.0 0.0.0.15 eq www
    • C. access-list 101 permit tcp 10.1.129.0 0.0.0.255 eq www 192.168.1.10 0.0.0.0 eq www
    • D. access-list 101 permit tcp host 192.168.1.10 eq 80 10.1.0.0 0.0.255.255 eq 3030
    • E. access-list 101 permit tcp 192.168.1.10 0.0.0.0 eq 80 10.1.0.0 0.0.255.255
    • F. access-list 101 permit ip host 10.1.129.100 eq 3030 host 192.168.1.100 eq 80

    Answer: B

    NEW QUESTION 15
    A network administrator is troubleshooting an issue whereupon they able to ping the web server, but unable to web browse to the same web server. When the administrator telnets to the webserver on port 80, the administrator gets a connection refused message. At which three layers of the OSI model does the problem exist? (Choose three.)

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

    Answer: DEG

    NEW QUESTION 16
    Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2 Ethernet ring topologies?

    • A. Spanning Tree Protocol
    • B. Flex Links
    • C. Resilient Ethernet Protocol
    • D. Spatial Reuse Protocol
    • E. Resilient Packet Ring

    Answer: C

    Explanation: http://www.cisco.com/en/US/docs/switches/metro/me3400/software/release/12.2_40_se/configurat ion/guide/swrep.html
    Resilient Ethernet Protocol (REP) on the Cisco ME 3400E Ethernet Access switch. REP is a Cisco proprietary protocol that provides an alternative to Spanning Tree Protocol (STP) to control network loops, handle link failures, and improve convergence time. REP controls a group of ports connected in a segment, ensures that the segment does not create any bridging loops, and responds to link failures within the segment. REP provides a basis for constructing more complex networks and supports VLAN load balancing.

    NEW QUESTION 17
    Refer to the two show output examples below. The switch with the e8ba.70b5.7180 MAC address is the root bridge for which VLAN or VLANs?
    640-878 dumps exhibit
    640-878 dumps exhibit
    640-878 dumps exhibit
    640-878 dumps exhibit

    • A. VLAN 1
    • B. VLAN 70
    • C. VLAN 80
    • D. VLANs 1, 70, and 80
    • E. VLANs 1 and 70
    • F. VLANs 1 and 80
    • G. VLANs 70 and 80

    Answer: C

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