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Following questions and answers are all new published by Avaya Official Exam Center: http://www.lead2pass.com/640-878.html
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
Answer: A
QUESTION 2
Which spanning-tree mode uses the name command to configure a region name?
A. MST
B. PVST+
C. PVRST+
D. RSTP
Answer: A
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
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
Answer: E
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
Answer: B
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
Answer: E
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.
Answer: BE
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
Answer: CDEF
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.
Answer: CE
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
Answer: AB
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640-878 new questions on Google Drive: https://drive.google.com/open?id=0B3Syig5i8gpDaXpIV25OZHQtMkE
2016 Cisco 640-878 exam dumps (All 133 Q&As) from Lead2pass:
http://www.lead2pass.com/640-878.html [100% Exam Pass Guaranteed]