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Exam 300-410 topic 1 question 149 discussion

Actual exam question from Cisco's 300-410
Question #: 149
Topic #: 1
[All 300-410 Questions]

What are two functions of IPv6 Source Guard? (Choose two.)

  • A. It works independent from IPv6 neighbor discovery.
  • B. It denies traffic from unknown sources or unallocated addresses.
  • C. It uses the populated binding table to allow legitimate traffic.
  • D. It denies traffic by inspecting neighbor discovery packets for specific patterns.
  • E. It blocks certain traffic by inspecting DHCP packets for specific sources.
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Suggested Answer: BC 🗳️

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2581c6a
1 year ago
Selected Answer: BC
BC are correct
upvoted 1 times
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chris110
1 year, 11 months ago
Selected Answer: BC
B. It denies traffic from unknown sources or unallocated addresses. C. It uses the populated binding table to allow legitimate traffic.
upvoted 2 times
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Brand
1 year, 11 months ago
Selected Answer: BC
First of all the question asks to choose two. Second of all, as the name indicates the Source Guard feature determines if the source of a traffic is coming from a prefix or address in the binding table. Binding table entries are populated using mechanisms like ND. So saying "It works independent from IPv6 neighbor discovery." is WRONG. So "one" of the two correct answers can not be A.
upvoted 3 times
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conft
1 year, 11 months ago
Selected Answer: A
the given answer is correct.
upvoted 1 times
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[Removed]
4 years ago
The given answer is correct IPv6 Source Guard blocks any data traffic from an unknown source. For example, one that is not already populated in the binding table or previously learned through Neighbor Discovery (ND) or Dynamic Host Configuration Protocol (DHCP) gleaning.
upvoted 3 times
leecharxos
3 years, 6 months ago
yeap :It filters inbound traffic on L2 switch ports that are not in the IPv6 binding table, https://networklessons.com/cisco/ccie-routing-switching-written/ipv6-source-guard
upvoted 2 times
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C (25%)
B (20%)
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