Networking, Addressing, and Communication Lesson 007: IPv6 Addresses

What decimal notation does IPv6 use?

Hexadecimal notation, broken down into eight segments, separated by colons.

How does IPv6 use shorthand notation?

By omitting leading zeroes in a segment.

What is an example of IPv6 shorthand notation?

2001:0db8:0000:0000:0000:0000:2a4e:0370 > 2001:db8:0:0:0:0:2a4e:370.

What is the double colon shorthand notation method?

A sequence of zero segments being replaced with a double colon to shorten the address.

What is an example of a double colon shorthand method?

2001:0db8:0000:0000:0000:0000:2a4e:0370 > 2001:db8::2a4e:370.

What is the limitation regarding the double colon shorthand method concerning IPv6?

Can only be used once in an address.

Why is the double colon IPv6 shorthand notation method limited?

To avoid ambiguity and because using it twice would cause lack of knowledge of how many zeros have been replaced.

Unicast IPv6 Addresses

Identify a single device and can be globally routed or link-local.

Globally Routed IPv6 Addresses

Enable Internet communication and begin with 2000-2999.

Link-Local IPv6 Addresses

Begin with FE80 and are automatically assigned to IPv6-enabled interfaces.

What are Link-Local IPv6 addresses used for?

Local network communication.

What will all devices with a globally routed unicast address receive?

A link-local address for internal communication.

Why are link-local addresses so critical?

Enables communication between devices on the same network, without relying on a centralized server or external infrastructure.

What does SLAAC stand for?

Stateless Address Autoconfiguration.

What is SLAAC for?

Configuring link-local addresses on a device.

What is Stateless Address Autoconfiguration?

A method that enables devices to create link-local IPv6 addresses.

How do devices create link-local IPv6 addresses in Stateless Address Autoconfiguration?

By appending a unique identifier from their MAC address using EUI-64 to the FE80 prefix.

Does the SLAAC configuration process happen automatically or manually?

Automatically.

Multicast Addresses

Enable efficient communication with multiple devices.

How does one identify a multicast address by sight?

Always begin with "FF".

What are anycast addresses?

Addresses that identify a group of devices or interfaces.

How do Anycast Addresses deliver data?

They deliver data to the nearest device based on routing metrics.

Where do anycast addresses come from?

From the same pool as unicast address.

What do anycast addresses lack?

A distinct visual identifier.

What are anycast addresses useful for?

Optimizing network traffic and implementing load balancing.

How do anycast addresses optimize network traffic?

By directing data to the nearest recipient.