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Exam JN0-351 All Questions

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Exam JN0-351 topic 1 question 35 discussion

Actual exam question from Juniper's JN0-351
Question #: 35
Topic #: 1
[All JN0-351 Questions]

Which two statements about BGP facilitate the prevention of routing loops between two autonomous systems? (Choose two.)

  • A. EBGP routers will append their AS number when advertising routes to their neighbors.
  • B. EBGP routers will only accept routes that contain their own AS number in the AS_PATH.
  • C. EBGP routers will drop routes that contain their own AS number in the AS_PATH.
  • D. EBGP routers will prepend their AS number when advertising routes to their neighbors.
Show Suggested Answer Hide Answer
Suggested Answer: CD 🗳️

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JosueSXYrouting
4 months, 2 weeks ago
Prepending: Used to manipulate path preference by making a route less attractive. It increases the AS path length, which can influence other ASes to prefer alternative, shorter paths.
upvoted 1 times
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rchp
4 months, 2 weeks ago
CD. If 192.168.2.0/24 is advertised in the order 65001 65002 65003, the route will look like this: 192.168.2.0/24 65003 65002 65001 I Therefore the answer is D(prepend)
upvoted 1 times
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cloud29
5 months, 2 weeks ago
A C are correct.
upvoted 1 times
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sandaruwann654
6 months ago
Selected Answer: CD
C,D are correct
upvoted 1 times
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Tvoja_mt
6 months, 2 weeks ago
AC is correct https://networklessons.com/bgp/bgp-prevent-transit-as
upvoted 1 times
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oz1i
8 months, 1 week ago
Selected Answer: AC
Pls read again, its AC. Append means it adds the ASPath to the route and this is done just from ebgp. Prepend is used when we want to influence the routes.
upvoted 1 times
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[Removed]
8 months, 4 weeks ago
Selected Answer: CD
CD is correct
upvoted 1 times
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borgermeister
12 months ago
Selected Answer: CD
When a BGP router advertises a prefix, it will include its own AS number to the left of the AS path attribute - aka prepending. Therefore C and D is correct
upvoted 1 times
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C (25%)
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