IPV6

Question 1

How long are Ipv6 addressses?

Answer 1

128 bits

Question 2

How many bits does one digit represent in an ipv6 address?

Answer 2

4

Question 3

In one group of four digits, how many bits are there?

Answer 3

16

Question 4

What is a network identifier and its length?

Answer 4

This identifies… the network you’re on. 64 bits.
It is pre-set by your ISP, usually, and the last four digits of this 64bit long section usually holds your subnet mask.

Question 5

Is ipv6 case sensitive?

Answer 5

No

Question 6

What generates the ipv6 interface id?

Answer 6

The OS, or, on older PCs, the MAC address.

Question 7

What is the start of the link local address?

Answer 7

fe80:: /64

Question 8

What is the ipv6 loopback address?

Answer 8

::1

Question 9

What is the address you use on the internet called?

Answer 9

Global address

Question 10

How does multi cast work?

Answer 10

Hosts sign up to receive data from specific addresses, and accept packets sent to said address.

Question 11

There is an all nodes multi cast, an all routers multi cast, and a solicited node multicast address. What are these?

Answer 11

ff02::1
ff02::2
ff02::1:ffxx:xxxx

Question 12

How does anycast work?

Answer 12

Any computer signed up to the address can receive the data, but only one computer will take it.

All hosts share an anycast address, and when data comes in either pre-set metrics or the best connection available will determine the computer that takes the data.

Question 13

What is the name of the process by which IPv6 hosts find each other’s MAC address?

Answer 13

Neighbour Discovery protocol

Question 14

During NDP, what is the stage in which a host responds to a MAC address request called?

Answer 14

Neighbor Advertisement

Question 15

During NDP, what is the stage in which a host sends a frame to the multicast address in search of a specific host’s MAC called?

Answer 15

Neighbor Solicitation

Question 16

How does an ipv6 machine start communicating with a router?

Answer 16

By sending a Router solicitation frame to the router specific multicast address (ff02::2)

Question 17

How does a router respond to an ipv6 solicitation?

Answer 17

With a router advertisement sent to the all nodes address (ff02::1). This also includes data such as the network prefix used in the global address, DNS information and more.

Question 18

What is a redirect frame in regards to NDP

Answer 18

When a router refers a host to a different router.

Question 19

What is SLAAC?

Answer 19

Stateless address autoconfiguration - The ipv6 equivalent of DHCP.
-Takes prefix from router and combines it with link local address
-Uses Neighbor discovery protocol to decide upon a link local (sends solicitation to node multicast to verify to it isn’t taken)