QUESTION: 249

Which of the following AS-paths can be matched by the AS-Path filter configured using the ip as-path-filter 1 permit ^12.*74$ command?

AS_Path (32 1274 23)
AS_Path (125 328 74 23)
AS_Path (123 621 743 2374)
AS_Path (321 12 2374)

Answer(s): C

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QUESTION: 250

A Route Distinguisher (RD) is used to distinguish the same IP address in different VPNs. How many bits does an RD contain?

Answer(s): A

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QUESTION: 251

Which of the following technologies can be used to improve the MPLS BGP VPN reliability?

VPN GR
FRR for private IP routes between Pes and CEs
VPN FRR
CE dual-homing networking at the access layer

Answer(s): A,C,D

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Typically, users within a VPN only communicate with other users in the same VPN. They cannot communicate with users on the Internet or access the Internet. Many VPN sites, however, may need to access the Internet. Which of the following statements regarding interconnection between the VPN and the Internet are true?

The interconnection between the VPN and the Internet can be implemented on the PE. However, the implementation is complex and may bring security risks. The PE is vulnerable to DoS attacks from the Internet.
Directly connect the CE to the Internet on the user side. Each user site can independently access the Internet. That is, a default route destined for the Internet is configured on the CE of each site.
Configure the PE to send a default route destined for the Internet to the CE, and add a default route destined for the Internet gateway to the VPN instance routing table.
Isolating public network routes and VPN routes on the user side is simple, secure, and reliable.

Answer(s): A,C,D

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QUESTION: 252