IPv6-Mikrotik

Question 1

What is the size of an IPv6 address?

Answer 1

128 bits

Question 2

What notation is used for the address of an IPv6 address?

Answer 2

Hexidecimal notation

Question 3

How many addresses are available in IPv6?

Answer 3

2^128

Question 4

Describe what the Neighbor Discovery Protocol is.

Answer 4

It is a communication protocol that enables devices on the same local network to:
- determine the layer 2 (MAC) address of other nodes
- find available routers and DNS servers
- detect duplicate addresses
It is responsible for the address configuration of nodes and the discorvery of other nodes on the link.
It replaces the ARP functionality of IPv4

Question 5

What are the 3 types of IPv6 addresses.

Answer 5

Unicast Addresses: a packet is delivered to one interface.
Multicast Addresses: a packet is delivered to multiple interfaces.
Anycast Addresses: a packet is delivered to the nearest of multiple interfaces (based on routing distance)

Question 6

Does IPv6 use broadcast messages? Yes or No.

Answer 6

No

Question 7

What type of Unicast addresses are there, mention the 2 main ones and one other.

Answer 7

Gloabally Unique Addresses: can be used to connect to anywhere on the internet.
Link-Local Address: only valid for communication on a local link
others:
- unique local addresses
- special purpose addresses
- compatibility addresses

Question 8

how are globally unique addresses assigned to a node?

Answer 8

using stateless address autoconfiguration (SLAAC) or DHCPv6

Question 9

Describe what a Link-Local address is.

Answer 9

It is a network address that is only valid for communications on a local link i.e. within a subnet that a host is connected to. It is required on every IPv6-enabled interface and generated automatically. An IPv6 router never routes or forwards link-local traffic beyond the link.

Question 10

what bits of an IPv6 address does the suffix represent?

Answer 10

the last 64 bits

Question 11

What different ways can the suffix of an IPv6 address be determined.

Answer 11

1. EUI-64
2. Randomly generated
3. Manually configured

Question 12

Explain what EUI-64 is in the context of determining the suffix of an IPv6 address.

Answer 12

Extended Unique Identifier
A traditional interface identifier for network adapters are a 48-bit MAC address. This address consists of a 24-bit manufacturer ID and a 24-bit Board ID. In order to create a suffix using this metho first insert 0xFFFE into the MAC address between the manufacturer ID and the Board ID, then reverse the seventh bit of the first byte .

Question 13

Name and explain the 3 IPv6 transistion methods.

Answer 13

Dual Stack: running both IPv4 and IPv6 on the same devices.
Tunneling: transporting IPv6 traffic through an IPv4 network transparently.
Translation: converting IPv6 traffic to IPv4 traffic for transport and vice versa.