642-821 Exam

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Exam : Cisco 642-821
Title : CCNP's Building Cisco Remote Access Networks (BCRAN)


1. Which three items are correct about the IPSec ESP security protocol? (Choose three.)
A. Authentication is mandatory and the whole packet including the header is authenticated.
B. Authentication is optional and the outer header is not authenticated.
C. IP packet is expanded by transport mode:37 bytes(3DES) or 63 bytes(AES); tunnel mode:57 bytes(3DES) or 83 bytes(AES)
D. IP packet is expanded by: transport mode 24 bytes; tunnel mode 44 bytes
E. The ESP security protocol provides data confidentiality.
F. The ESP security protocol provides no data confidentiality.
Answer: BCE

2. Which two of the following events will occur when the router command backup load 60 5 is used? (Choose two.)
A. The backup link activates when the primary link exceeds 60 percent of bandwidth.
B. The backup link activates when the primary link exceeds 60 kbps.
C. The backup link deactivates when the primary link falls to 5 percent bandwidth.
D. The backup link deactivates when the combined load falls to 5 percent bandwidth.
E. The backup link deactivates when the combined load falls to 5 kbps.
Answer: AD

3. Based on the above configuration, which statement is true?
A. The backup interface will be used when traffic reaches 80 kbps on the primary interface.
B. The backup interface will be disabled when the combined load on the primary and backup interfaces is less than 10%
C. The backup interface will be disabled when the combined load on the primary and backup interfaces is less than 80 kbps.
D. The backup interface will be disabled when the load on the primary interface is less than 10%.
E. The backup interface will be disabled when the load on the primary interface is less than 80 kbps.
Answer: B

4. Single choice
2. Which two of the following events will occur when the router command backup load 60 5 is used? (Choose two.)
A. The backup link activates when the primary link exceeds 60 percent of bandwidth.
B. The backup link activates when the primary link exceeds 60 kbps.
C. The backup link deactivates when the primary link falls to 5 percent bandwidth.
D. The backup link deactivates when the combined load falls to 5 percent bandwidth.
E. The backup link deactivates when the combined load falls to 5 kbps.
Answer: AD

5. Given the configuration command shown in the exhibit, which statement is true?
A. All incoming TCP packets will be compressed
B. All outgoing TCP packets will be compressed
C. Incoming TCP packets will be compressed only if outgoing TCP packets on the same interface are compressed
D. Outgoing TCP packets will be compressed only if incoming TCP packets on the same interface are compressed
E. All incoming and outgoing TCP packets will be compressed.
Answer: D

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