IPv6 addressing basics in Computer Networks - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the length of an IPv6 address?

An IPv6 address is 128 bits long, which allows for a very large number of unique addresses.

beginner

How is an IPv6 address typically written?

IPv6 addresses are written as eight groups of four hexadecimal digits, separated by colons, for example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334.

beginner

What does the double colon (::) mean in an IPv6 address?

The double colon (::) is a shorthand notation that represents one or more groups of 16 bits of zeros to simplify the address.

beginner

What are the main parts of an IPv6 address?

An IPv6 address has two main parts: the network prefix (which identifies the network) and the interface identifier (which identifies the device on that network).

beginner

Why was IPv6 created?

IPv6 was created to replace IPv4 because IPv4 addresses were running out. IPv6 provides a much larger address space and improved features.

How many bits are in an IPv6 address?

A 256 bits

B 32 bits

C 64 bits

D 128 bits

IPv6 addresses are 128 bits long, which is much larger than the 32-bit IPv4 addresses.

What symbol is used to separate groups in an IPv6 address?

A :

B .

C -

D /

IPv6 addresses use colons (:) to separate the eight groups of hexadecimal digits.

What does the double colon (::) represent in IPv6 notation?

A A single zero

B One or more groups of zeros

C A separator between network and host

D An error in the address

The double colon (::) is a shorthand for one or more groups of 16 bits of zeros to simplify the address.

Which part of the IPv6 address identifies the device on the network?

A Interface identifier

B Subnet mask

C Network prefix

D Gateway address

The interface identifier part of the IPv6 address identifies the specific device on the network.

Why is IPv6 important compared to IPv4?

A It is easier to remember

B It uses shorter addresses

C It supports more devices with a larger address space

D It uses decimal numbers

IPv6 provides a much larger address space, allowing many more devices to connect to the internet.

Explain the structure of an IPv6 address and how it differs from IPv4.

Think about the length and format differences compared to IPv4.

Describe the purpose of the double colon (::) in IPv6 addresses and give an example.

It helps simplify long sequences of zeros.