Building Cisco Service Provider Next-Generation Networks ... Cisco Service Provider Next-Generation Networks, Part 2 ... Building Cisco Service Provider Next-Generation Networks, Part

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  • Building Cisco Service Provider Next-Generation Networks, Part 2

    Number: 640-878Passing Score: 800Time Limit: 90 minFile Version: 1.0

    http://www.gratisexam.com/

    By VERT1G0

    640-878 SPNGN2Building Cisco Service Provider Next-Generation Networks, Part 2

    ExamNumber: 640-878

    AssociatedCertifications: CCNA SP

    Duration: 90 minutes (65-75 questions)

    AvailableLanguages: English

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  • Exam A

    QUESTION 1Which spanning-tree mode can be used to map several VLANs to a single spanning-tree instance?

    A. MSTB. PVST+C. PVRST+D. RSTP

    Correct Answer: ASection: (none)Explanation

    Explanation/Reference:

    QUESTION 2Which spanning-tree mode uses the name command to configure a region name?

    A. MSTB. PVST+C. PVRST+D. RSTP

    Correct Answer: ASection: (none)Explanation

    Explanation/Reference:

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

    A. netbootB. turbobootC. install recoveryD. install rollbackE. install add and install activate

    Correct Answer: BSection: (none)Explanation

    Explanation/Reference:

    QUESTION 4Which file extension indicates a bootable installation file in Cisco IOS XR software?

    A. .binB. .tarC. .smu

  • D. .pieE. .vmF. .mini

    Correct Answer: ESection: (none)Explanation

    Explanation/Reference:

    QUESTION 5When configuring an ACL entry, which network and wildcard mask matches only IP addresses 10.8.144.0 to10.8.151.255?

    A. 10.8.144.0 0.0.3.255B. 10.8.144.0 0.0.7.255

    http://www.gratisexam.com/

    C. 10.8.144.0 0.0.15.255D. 10.8.144.0 0.0.252.255E. 10.8.144.0 0.0.248.255F. 10.8.144.0 0.0.240.255

    Correct Answer: BSection: (none)Explanation

    Explanation/Reference:

    QUESTION 6Which IP addresses are matched by the permit 192.168.80.64 0.0.0.15 access-list entry?

    A. 192.168.80.64 to 192.168.80.255B. 192.168.80.64 to 192.168.80.96C. 192.168.80.64 to 192.168.80.95D. 192.168.80.64 to 192.168.80.80E. 192.168.80.64 to 192.168.80.79

    Correct Answer: ESection: (none)Explanation

    Explanation/Reference:

    QUESTION 7Which two statements about NAT444 are true? (Choose two.)

  • A. NAT444 packets are translated three times.B. NAT packets traverse three IPv4 addressing domains.C. NAT444 needs to work together with DNS64.D. There are two types of NAT444 (stateful or stateless).E. NAT is performed by the CPE and also by the service provider router.

    Correct Answer: BESection: (none)Explanation

    Explanation/Reference:

    QUESTION 8

    The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which four packets thatare 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: 8080B. destination IP address: 192.168.15.41, destination TCP port: 8080C. destination IP address: 192.168.15.49, destination TCP port: 8080D. destination IP address: 192.168.15.36, destination TCP port: 80E. destination IP address: 192.168.15.46, destination TCP port: 80F. destination IP address: 192.168.15.49, destination TCP port: 80

    Correct Answer: CDEFSection: (none)Explanation

    Explanation/Reference:

    QUESTION 9Which 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.

    Correct Answer: CESection: (none)Explanation

  • Explanation/Reference:

    QUESTION 10

    The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which two packets thatare sourced from 172.16.1.1 TCP port 1050, if they are routed to the Gi0/0/0/0 interface, will be permitted?(Choose two)

    A. destination IP address: 10.10.192.201, destination TCP port: 80B. destination IP address: 10.10.193.255, destination TCP port: 80C. destination IP address: 10.10.196.1, destination TCP port: 80D. destination IP address: 10.10.195.254, destination TCP port: 23E. destination IP address: 10.10.193.145, destination TCP port: 23F. destination IP address:10.10.197.32, destination TCP port: 23

    Correct Answer: ABSection: (none)Explanation

    Explanation/Reference:

    QUESTION 11Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual MAC address tothe active virtual forwarders?

    A. HSRPB. VRRPC. GLBPD. FHRP

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 12Which 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.

    Correct Answer: BC

  • Section: (none)Explanation

    Explanation/Reference:

    QUESTION 13Which BGP attribute is also used for loop prevention?

    A. weightB. local preferenceC. MEDD. AS path

    Correct Answer: DSection: (none)Explanation

    Explanation/Reference:

    QUESTION 14The permit 172.16.32.0 0.0.15.255 access-list entry permits exactly which IP address range?

    A. 172.16.32.0 to 172.16.47.255B. 172.16.32.0 to 172.16.48.255C. 172.16.32.0 to 172.16.62.255D. 172.16.32.0 to 172.16.63.255E. 172.16.32.0 to 172.16.64.255F. 172.16.32.0 to 172.16.255.255

    Correct Answer: ASection: (none)Explanation

    Explanation/Reference:

    QUESTION 15On the Cisco ME 3400 switch, spanning tree is enabled by default on which type of switch port?

    A. UNIB. ENIC. NNID. ENI and NNIE. UNI, ENI, and NNI

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 16

  • Refer to the two show output examples below. The switch with the e8ba.70b5.7180 MAC addressis the root bridge for which VLAN or VLANs?

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

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 17Refer to the Cisco IOS XR commands exhibit.

    The router administrator is trying to activate a software package on the router but is not able to doso. 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.

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 18During the BGP route selection process on Cisco routers, which BGP attribute is examined first, to determinethe best path to use?

    A. AS pathB. MEDC. local preferenceD. weightE. weight

    Correct Answer: DSection: (none)Explanation

    Explanation/Reference:

    QUESTION 19Which type of service provider is responsible for offering backbone connectivity services to other serviceproviders?

    A. CSPB. TSPC. NSPD. ISPE. ASP

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 20Cisco IP NGN service providers can offer multiple services to their customers by using which type of technologyin their core networks?

    A. ATMB. SONET/SDHC. Frame Relay

  • D. IP/MPLSE. PBB

    Correct Answer: DSection: (none)Explanation

    Explanation/Reference:

    QUESTION 21ISPs use which protocol to establish peering sessions in an Internet exchange point environment?

    A. LDPB. IS-ISC. BGPD. OSPF

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 22You are enabling OSPF on a router and notice that all the Fast Ethernet and the Gigabit Ethernet interfaceshave the same OSPF cost of 1. Which single configuration change can you make in router ospf configurationmode 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.

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 23On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0 interface that hasan IPv4 IP address of 192.168.1.1/24?

    http://www.gratisexam.com/

    A. router ospf 1

  • network 192.168.1.1 0.0.0.0 area 0B. router ospf 1

    network 192.168.1.1 255.255.255.255 area 0C. 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 1area 0network 192.168.1.0

    G. router ospfv3 1area 0interface gi0/0/0/0

    Correct Answer: CSection: (none)Explanation

    Explanation/Reference:

    QUESTION 24Which three statements about OSPFv2 or OSPFv3 authentication are true? (Choose three.)

    A. On Cisco IOS XR platforms, OSPFv3 authentication can be configure