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Huawei H12-224 Practice Test - Questions Answers, Page 48

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BGP is an exterior gateway protocol which runs among ASs. It focuses on routes control and selection of optimal routes rather than discovery and calculation of routes.

A.
True
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: A

When a TCP connection works properly, what is the status of the BGP peer relationship if the peer AS number configured for a BGP router is inconsistent with the AS number of its BGP peer?

A.
Idle
A.
Idle
Answers
B.
Active
B.
Active
Answers
C.
OpenSent
C.
OpenSent
Answers
D.
Establish
D.
Establish
Answers
Suggested answer: B

The BGP Community attribute is a well-known mandatory attribute.

A.
True
A.
True
Answers
B.
False
B.
False
Answers
Suggested answer: B

Which of the followings is used to avoid route loops in BGP?

A.
Use ORIGIN attribute to record route origin
A.
Use ORIGIN attribute to record route origin
Answers
B.
Use AS_PATH attribute to record all ASs during a route passing from the local area to the destination in a certain order
B.
Use AS_PATH attribute to record all ASs during a route passing from the local area to the destination in a certain order
Answers
C.
Use NEXT_HOP attribute to record next hop of the route
C.
Use NEXT_HOP attribute to record next hop of the route
Answers
D.
Use MED attribute to influence export selection of other AS
D.
Use MED attribute to influence export selection of other AS
Answers
Suggested answer: B

Which BGP attribute is usually used to determine the path along which data flows enter an AS?

A.
Router ID
A.
Router ID
Answers
B.
Nexthop
B.
Nexthop
Answers
C.
Local-Preference
C.
Local-Preference
Answers
D.
MED
D.
MED
Answers
Suggested answer: D

Which parameters are optional for configuring a BGP peer? (Choose two.)

A.
IP address
A.
IP address
Answers
B.
Description
B.
Description
Answers
C.
Password
C.
Password
Answers
D.
AS-number
D.
AS-number
Answers
Suggested answer: B, C

Assume that a TCP connection works properly, and the peer AS number configured for a BGP router is different from the AS number of its BGP peer. During the establishment of a BGP session, the BGP router exchanges routing information with its peer, and finds that its peer AS number is different from the AS number of the peer. Therefore, the BGP router sends a Notification message to the peer, indicating that the establishment of a BGP session fails. Which message can be identified by the Error Code field in the Notification message?

A.
Route-refresh
A.
Route-refresh
Answers
B.
Open
B.
Open
Answers
C.
Keepalive
C.
Keepalive
Answers
D.
Update
D.
Update
Answers
Suggested answer: B

Which statements about BGP well-known mandatory attributes are true? (Choose three.)

A.
Well-known mandatory attributes must be identified by all BGP routers.
A.
Well-known mandatory attributes must be identified by all BGP routers.
Answers
B.
Well-known mandatory attributes must be transmitted between BGP peers.
B.
Well-known mandatory attributes must be transmitted between BGP peers.
Answers
C.
Well-known mandatory attributes are optional in an Update packet, and can be carried in an Update packet as needed.
C.
Well-known mandatory attributes are optional in an Update packet, and can be carried in an Update packet as needed.
Answers
D.
Well-known mandatory attributes must be carried in an Update packet.
D.
Well-known mandatory attributes must be carried in an Update packet.
Answers
Suggested answer: A, B, D

Which statements about BGP route selection rules are true? (Choose three.)

A.
BGP first ignores routes with unreachable next hops.
A.
BGP first ignores routes with unreachable next hops.
Answers
B.
A summarized route takes precedence over a non-summarized route.
B.
A summarized route takes precedence over a non-summarized route.
Answers
C.
IBGP routes take precedence over EBGP routes.
C.
IBGP routes take precedence over EBGP routes.
Answers
D.
If other conditions of routes are the same, the route with the shortest Cluster_List is preferred.
D.
If other conditions of routes are the same, the route with the shortest Cluster_List is preferred.
Answers
Suggested answer: A, B, D

Which of the following statements are correct regarding intra-area route calculation of OSPF? (Choose two.)

A.
Every OSPF router only uses one Router LSA to describe local active link state for one area.
A.
Every OSPF router only uses one Router LSA to describe local active link state for one area.
Answers
B.
Every OSPF uses more than one Router LSA to describe local active link state for one area.
B.
Every OSPF uses more than one Router LSA to describe local active link state for one area.
Answers
C.
One Router LSA only describes one link.
C.
One Router LSA only describes one link.
Answers
D.
One Router LSA describes more than one link.
D.
One Router LSA describes more than one link.
Answers
Suggested answer: A, D
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