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Exam JN0-664 topic 1 question 53 discussion

Actual exam question from Juniper's JN0-664
Question #: 53
Topic #: 1
[All JN0-664 Questions]

Which origin code is preferred by BGP?

  • A. Internal
  • B. External
  • C. Incomplete
  • D. Null
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Suggested Answer: A 🗳️

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MartinAlappa
Highly Voted 12 months ago
A is correct. IGP > EGP > ? (incomplete) which has values 0>1>2. I the path selection lower origin value is preferred.
upvoted 6 times
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albert1687
Most Recent 2 months, 1 week ago
Selected Answer: D
• By default, PHP (Penultimate Hop Popping) removes the top MPLS label at the penultimate router (P-1), before the packet reaches PE-2. • This causes loss of EXP bits from the outer label, preventing PE-2 from classifying the traffic based on them. • Using explicit-null on PE-1 ensures the outer MPLS label is preserved, but with label value 0 (IPv4 explicit-null), so that EXP bits reach PE-2. • PE-2 can then read the EXP bits and classify the traffic correctly
upvoted 1 times
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marius2
10 months, 1 week ago
Selected Answer: A
A is correct.
upvoted 3 times
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Dimsop_Technology
11 months ago
Selected Answer: A Prefer the route with the lower origin code. Routes learned from an IGP have a lower origin code than those learned from an exterior gateway protocol (EGP), and both have lower origin codes than incomplete routes (routes whose origin is unknown). https://www.juniper.net/documentation/us/en/software/junos/vpn-l2/bgp/topics/concept/routing-protocols-address-representation.html
upvoted 3 times
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StargateCommand
11 months, 2 weeks ago
Selected Answer: A
A is correct. IGP > EGP > ? (incomplete) which has values 0>1>2. I the path selection lower origin value is preferred.
upvoted 2 times
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eknow
1 year ago
Selected Answer: C
C is correct. IGP > EGP > ? (incomplete).
upvoted 1 times
6e9ca2f
10 months, 3 weeks ago
IGP is "A", not "C"
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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