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2021 Nov cbt nuggets 640-878:
Q11. Which two statements about the link state routing process are true? (Choose two.)
A. It uses the DUAL algorithm.
B. It uses metrics such as AS path.
C. All routers in the area have link state databases.
D. The administrative distance is 1 by default.
E. Each router in the area floods LSPs to all neighbors.
Answer: C,E
Q12. On Cisco IOS XR software, which two of the address-family command options in IS-IS configuration mode are valid? (Choose two)
A. address-family clns
B. address-family ipv4 unicast
C. address-family ipv6 unicast
D. address-family vpnv4
E. address-family vpnv6
Answer: B,C
Q13. Refer to the configuration example exhibit.
***Exhibit is Missing***
Which statement is true?
A. A trunk port has been created and VLAN has been allowed.
B. An access port has been created on a UNI.
C. A customer VLAN of 209 is configured.
D. A QinQ VLAN of 118 is configured.
Answer: D
Q14. When configuring a new VLAN on Cisco IOS switches, which configuration parameter is required?
A. VLAN name
B. native VLAN ID
C. VLAN ID
D. VLAN map
E. VLAN MTU
Answer: C
Q15. Cisco IP NGN service providers can offer multiple services to their customers by using which type of technology in their core networks?
A. ATM
B. SONET/SDH
C. Frame Relay
D. IP/MPLS
E. PBB
Answer: D
Most recent examcollection 640-878:
Q16. Which spanning-tree mode uses the name command to configure a region name?
A. MST
B. PVST+
C. PVRST+
D. RSTP
Answer: A
Q17. 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
Q18. 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
Q19. Refer to the partial Cisco IOS router configuration exhibit.
***Exhibit is Missing***
Which statement is true?
A. To support the subinterface configuration, the Fa0/0 main interface configuration is missing the encapsulation dot1Q command.
B. The Fa0/0 interface/subinterfaces are configured correctly to operate as a trunk port to provide inter-VLAN routing for three VLANs (VLANs 1, 2, and 3).
C. To provide inter-VLAN routing, the Fa0/0.1, Fa0/0.2 and Fa0/0.3 subinterface configuration is missing the encapsulation dot1Q vlan-id subinterface configuration command.
D. To provide inter-VLAN routing, the router is missing the vlan 1, vlan 2, and vlan 3 global configuration commands.
Answer: C
Q20. You have installed a new router and configured OSPF on it. However, this new router is not able to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four conditions could cause this problem? (Choose four.)
A. mismatched OSPF hello/dead interval between the new router and the neighbor router
B. mismatched OSPF area ID between the new router and the neighbor router
C. mismatched OSPF authentication data between the new router and the neighbor router
D. mismatched OSPF router ID between the new router and the neighbor router
E. mismatched interface MTU between the new router and the neighbor router
F. mismatched interface bandwidth between the new router and the neighbor router
Answer: A,B,C,E
Refer to the Cisco IOS XR configuration exhibit.
***Exhibit is Missing***
Which statement about the configuration is true?
A. This is a Level-2-only router.
B. This is a Level-1-only router.
C. The maximum IS-IS path metric is 63.
D. This router belongs to area ID 0001.
E. This configuration is missing the net configuration for the IPv6 unicast address family.
Answer: D