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Ericsson ECP-206 Exam - Topic 4 Question 30 Discussion

IPv6 link-local addresses are designed to be used in which three situations? (Choose three.)
A) for neighbor discovery and B) for local IP communication on the IPv6 capable routers and C) addressing on a single link for purposes such as auto-address configuration
D) by routers to forward packets with link-local source addresses to other links
E) when routers are not present

Ericsson ECP-206 Exam - Topic 4 Question 30 Discussion

Actual exam question for Ericsson's ECP-206 exam
Question #: 30
Topic #: 4
[All ECP-206 Questions]

IPv6 link-local addresses are designed to be used in which three situations? (Choose three.)

Show Suggested Answer Hide Answer
Suggested Answer: A, B, C

IPv6 link-local addresses are designed to be used in three situations: for neighbor discovery, for local IP communication on the IPv6 capable routers, and for addressing on a single link for purposes such as auto-address configuration. Neighbor discovery is a protocol that allows IPv6 nodes to discover each other and learn their link-layer addresses on a local network.Neighbor discovery uses link-local addresses to send and receive messages such as router advertisements, router solicitations, neighbor advertisements, and neighbor solicitations34. Local IP communication on the IPv6 capable routers refers to the ability of routers to exchange routing information or management traffic using their link-local addresses as source and destination addresses.This reduces the need for global unicast addresses on router interfaces that are not reachable from outside the local network35. Addressing on a single link for purposes such as auto-address configuration refers to the use of link-local addresses to enable IPv6 nodes to obtain an address without manual configuration or a DHCP server. Link-local addresses can be automatically derived from the interface identifier in the modified EUI-64 format or randomly generated.Link-local addresses can also be used to test the connectivity of a link before obtaining a global unicast address36.


by Whitley at Sep 14, 2024, 04:17 PM

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Florinda
7 months ago
D seems off, link-local is for the same link only.
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Felicidad
8 months ago
Wait, can link-local addresses really work without routers?
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Angelica
8 months ago
C is spot on for auto-address config!
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Marjory
8 months ago
Agree, also for local IP communication.
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Rolf
8 months ago
Definitely for neighbor discovery!
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Truman
9 months ago
I feel like they are definitely used when routers are not present, but I can't recall the third one.
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Jacki
9 months ago
I'm pretty confident that link-local addresses are used for auto-address configuration on a single link. That seems right.
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Tony
9 months ago
I think one of the uses is for local IP communication on routers, but I might be mixing it up with something else.
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Rodolfo
9 months ago
I remember link-local addresses are used for neighbor discovery, but I'm not sure about the other two situations.
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Ruth
9 months ago
Wait, I'm a little confused. I know link-local addresses are for local communication, but I'm not sure about the specific situations. I'll have to review my notes and try to eliminate the less relevant options.
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Dexter
9 months ago
I've got this! Link-local addresses are used for local communication on a single link, like for auto-configuration. They're also used by routers for forwarding packets with link-local source addresses. And of course, for neighbor discovery. Easy peasy!
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Rory
9 months ago
Okay, let's see. I remember link-local addresses are used for neighbor discovery and auto-configuration, so those are definitely two of the answers. The third one is trickier, but I'll give it my best shot.
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Shoshana
9 months ago
Hmm, I'm a bit unsure about this one. I know link-local addresses are used for local communication, but I'll need to think through the specific scenarios carefully.
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Pauline
9 months ago
This question seems straightforward. I'll focus on the key details about link-local addresses and choose the three most relevant situations.
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Weldon
2 years ago
I believe link-local addresses are not used when routers are not present, as they are specifically designed for local communication within a single link.
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Elli
2 years ago
I agree with Vernell. Link-local addresses are essential for communication on a single link and for routers to forward packets within that link.
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Lisandra
2 years ago
This is easy, A, C, and E. Link-local addresses are for local stuff, not for routers to mess with. D is just silly.
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Erinn
2 years ago
E) when routers are not present
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Martina
2 years ago
C) addressing on a single link for purposes such as auto-address configuration
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Donte
2 years ago
A) for neighbor discovery
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Vernell
2 years ago
I think IPv6 link-local addresses are used for neighbor discovery, local IP communication on IPv6 routers, and auto-address configuration.
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Kathryn
2 years ago
Haha, D? Forwarding link-local addresses to other links? That's a good one! Let's go with A, C, and E.
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Nickole
2 years ago
Definitely A, C, and E. I remember learning that link-local addresses are used for auto-configuration and when routers are not present. D doesn't make sense.
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Lilli
2 years ago
E) when routers are not present
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An
2 years ago
C) addressing on a single link for purposes such as auto-address configuration
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Latanya
2 years ago
A) for neighbor discovery
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Delisa
2 years ago
I think A, C, and E are the correct answers. Link-local addresses are for local communication, not for routers to forward packets.
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Jacklyn
2 years ago
Actually, A, C, and D are the correct answers. Link-local addresses are used by routers to forward packets within the same link.
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Sophia
2 years ago
I believe A and C are correct, but E is not because routers can still use link-local addresses.
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Stacey
2 years ago
I agree, link-local addresses are used for neighbor discovery and auto-address configuration.
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Ryan
2 years ago
I think A, C, and E are the correct answers.
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