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QUESTION NO: 1
Which of the following description about DR is correct?
A. In the network segment DR election, when the DR priority is the same, the bigger IP address is elected.
B. The source DR is responsible for sending Register messages with multicasting to the RP.
C. Assert Winner on the shared network segment may not be the network segment DR.
D. The receiver DR is responsible for sending Join messages to the multicast source or RP.
Answer: A,C,D
QUESTION NO: 2
Regarding the description of BGP Keepalive message, which is wrong?
A. Keepalive packets are consist of only one BGP data header.
B. By default, the keepalive interval is 180s.
C. Keepalive is periodically sent between two BGP neighbors.
D. Keepalive packets are mainly used for the running status of the peer routers and the availability confirmation of the link.
Answer: B
QUESTION NO: 3
About the basic concepts of link aggregation, the following description which is wrong?
A. Link aggregation is a method of binding a group of physical interfaces together as a logical interface to increase bandwidth and reliability.
B. Logical links formed by binding multiple physical links are called link aggregation groups (LAGs) or trunk.
C. There are only active interfaces for link aggregation.
D. Link aggregation follows the IEEE 802.3ad protocol.
Answer: C
QUESTION NO: 4
Which of following the multicast distribution tree is wrong?
A. The PIM-DM protocol can only generate SPT trees.
B. The PIM-SM protocol can generate both RPT trees and SPT trees.
C. The PIM-DM protocol can generate both RPT trees and SPT trees.
D. The multicast distribution trees are generally divided into two types: SPT and RPT.
Answer: C
QUESTION NO: 5
The OSFF NBMA network requires that routers in the network must select DR and BDR; otherwise, they can't work.
A. False
B. True
Answer: A
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Updated: May 28, 2022