Module 11: IPv6 Addressing

Does IPv6 use NATing?

No.

NAT is problematic for many applications, creates latency, and has limitations that severely impede peer-to-peer communications.

How many possible IPv6 addresses are there?

340 undecillion.

340,000,000,000,000,000,000,000,000,000,000,000,000 IPv6 addresses.

What is the IoT?

Internet of Things (IoT)

All the things that can connect to the internet.

What is a dual stacking network?

A network that supports IPv4 and IPv6.

What does tunneling do?

Encapsulates an IPv6 packet within an IPv4 packet in order to be transported across an IPv4 only network.

How does dual stacking affect the speed of the router its running on?

Dual stacking slows down the router due to the router now using two separate routing tables.

What does NAT64 do?

It Allows IPv6-enabled devices to communicate with IPv4-enabled devices.

NAT64 uses a translation technique similar to NAT for IPv4. An IPv6 packet is translated to an IPv4 packet and an IPv4 packet is translated to an IPv6 packet.

What is the shortest form of this IPv6 address?
2001:1012:0000:00A2:0C16:0000:0000:2000/64

2001:1012:0:A2:C16::2000/64

How many bits are assigned for the host in an IPv6 address?

64 bits.

Do IPv6 addresses have subnet masks?

No.

IPv6 addresses instead use the 16 bits before the host section of the address to subnet.

In an IPv6 address, the first 48 bits contain what info?

Region, ISP, Company. In that order.

Is a server needed to use SLAAC in an IPv6 network?

No

SLAAC uses the hosts OS.

What is stateful addressing?

IPv6 addressing with a DHCP server.

What is stateless addressing?

IPv6 addressing with just a DNS server.

What does “2000:” at the beginning of an IPv6 address signify?

The address is a globally routable address.

What is the size and placement of the prefix of an IPv6 address?

The first 64 bits.

What is the size and placement of the interface ID of an IPv6 address?

The last 64 bits.

What is the loopback address for IPv6?

::1/128

What are unique local addresses similar to in IPv4?

Private addresses.

What is the prefix of link local addresses?

FE80::/10

LLA stands for what?

Link Local Address (LLA)

What prefix signifies an IPv6 multicast address?

FF00::/8

How many host addresses per IPv6 subnet?

18 quintillion.

18,000,000,000,000,000,000 IPv6 host addresses.

When are router interfaces automatically given a link local address?

When the interface is up.