Download Cisco.PracticeDumps.640-878.2017-12-08.1e.126q.vcex

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Exam Building Cisco Service Provider Next-Generation Networks, Part 2
Number 640-878
File Name Cisco.PracticeDumps.640-878.2017-12-08.1e.126q.vcex
Size 6.93 Mb
Posted July 24, 2018
Downloaded 0



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Demo Questions

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

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



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

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



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



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

  • A: .bin
  • B: .tar
  • C: .smu
  • D: .pie
  • E: .vm
  • F: .mini



Question 5
When configuring an ACL entry, which network and wildcard mask matches only IP addresses 10.8.144.0 to 10.8.151.255?

  • A: 10.8.144.0 0.0.3.255
  • B: 10.8.144.0 0.0.7.255
  • C: 10.8.144.0 0.0.15.255
  • D: 10.8.144.0 0.0.252.255
  • E: 10.8.144.0 0.0.248.255
  • F: 10.8.144.0 0.0.240.255



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

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



Question 7
Which 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.



Question 8
Refer to the 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



Question 9
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.



Question 10
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









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