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Cisco 640-878 Online Practice Questions and Exam Preparation

640-878 Exam Details

  • Exam Code
    :640-878
  • Exam Name
    :Building Cisco Service Provider Next-Generation Networks
  • Certification
    :Cisco Certifications
  • Vendor
    :Cisco
  • Total Questions
    :126 Q&As
  • Last Updated
    :Dec 15, 2021

Cisco 640-878 Online Questions & Answers

  • Question 61:

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

  • Question 62:

    Which commands will configure the spanning tree operating mode that can group multiple VLANs in a single domain?

    A. switch(config)#spanning-tree mode pvst
    B. switch(config)#spanning-tree mode rstp
    C. switch(config)#spanning-tree mode rapid-pvst
    D. switch(config)#spanning-tree mode mst
    E. switch(config)#spanning-tree mode mst-plus

  • Question 63:

    Which two commands are required to configure an access port for both voice VLAN 20 and data VLAN 30? (Choose two.)

    A. switchport mode access 30
    B. switchport data vlan 30
    C. switchport access data 20
    D. switchport access data 30
    E. switchport access vlan 30
    F. switchport mode voice 20
    G. switchport voice vlan 20

  • Question 64:

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

    A. LDP
    B. IS-IS
    C. BGP
    D. OSPF

  • Question 65:

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

    A. HSRP
    B. VRRP
    C. GLBP
    D. FHRP

  • Question 66:

    DRAG DROP

    Select and Place:

  • Question 67:

    Refer to the exhibit.

    The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which two packets that are 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: 80
    B. destination IP address: 10.10.193.255, destination TCP port: 80 C. destination IP address: 10.10.196.1, destination TCP port: 80
    D. destination IP address: 10.10.195.254, destination TCP port: 23
    E. destination IP address: 10.10.193.145, destination TCP port: 23
    F. destination IP address: 10.10.197.32, destination TCP port: 23

  • Question 68:

    Refer to the exhibit.

    A network engineer configured BGP PE to CE neighbor sessions with the commands shown. What does 'address-family ipv4 vrf vrf-cisco' from the configuration allow?

    A. activates the advertisement of the IPv4 address family
    B. defines customer's routing context
    C. specifies a network and mask to announce in VRF-Cisco
    D. redistribute VRF-Cisco

  • Question 69:

    You want to configure HSRP between a Cisco IOS and a Cisco IOS XR router for the 192.0.2.0/24 subnet. Half of the PCs on the 192.0.2.0/24 subnet are configured to use 192.0.2.1 as the default gateway, and the other half of the PCs are configured to use 192.0.2.254 as the default gateway. The intent is to load balance the traffic across both routers.

    Which two IOS and IOS XR configurations are needed? (Choose two.)

    A. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 95 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 105 hsrp 2 preempt
    B. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.1 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 99 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 101 hsrp 2 preempt
    C. ! IOS-XR interface GigabitEthernet 0/0/0/0 ip address 192.0.2.3 255.255.255.0 router hsrp interface GigabitEthernet 0/0/0/0 hsrp 1 ipv4 192.0.2.1 hsrp 1 priority 1 hsrp 1 preempt hsrp 2 ipv4 192.0.2.254 hsrp 2 priority 1 hsrp 2 preempt
    D. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 priority 105 standby 1 preempt standby 2 ip 192.0.2.254 standby 2 priority 95 standby 2 preempt
    E. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.254 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 preempt standby 2 ip 192.0.2.254 standby 2 preempt
    F. ! IOS interface GigabitEthernet 0/0 ip address 192.0.2.2 255.255.255.0 standby 1 ip 192.0.2.1 standby 1 preempt standby 1 priority 2 standby 2 ip 192.0.2.254 standby 2 preempt standby 2 priority 2

  • Question 70:

    On Cisco routers, the address-family configuration command in BGP configuration mode is used to enable which BGP feature?

    A. BGP route policy
    B. multiprotocol BGP
    C. BGP policy accounting
    D. BGP communities

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