Q3 IPv6

Question 1

What does an Unspecified address look like?

Answer 1

: :

Question 2

What does a Loopback address look like?

Answer 2

: : 1

Question 3

What do Link-local unicast addresses look like?

Answer 3

fe80::/10

Question 4

What do Unique-local unicast addresses look like?

Answer 4

fc00::/7

Question 5

What do Global unicast addresses look like?

Answer 5

2000::/3

Question 6

What do Multicast addresses addresses look like?

Answer 6

ff00::/8

Question 7

Since some IPv6 addresses are formed by hosts themselves using EUI-64 identifier in Stateless Address AutoConfiguration (SLAAC), there could be duplicate addresses. Explain how SLAAC detects duplicate addresses.

Answer 7

When it connects it sends a router solicitation to the network then listens for advertisements sent by routers, these provide the network prefix and flags saying that slaac is permitted. then the host generates a full ipv6 by combining it with the network prefix. to ensure the address is not already in use the host performs dad by sending a neighbour solicitation message to the network, if no response recieved the address is assumed to be unique and is assigned to the interface.