IPv6 addressing and subnetting

Question 1

An experimental protocol that introduced the concept of connections. never saw wide adoption. connection state was handled better later on by the transport layer and TCP.

Answer 1

IPv5

Question 2

Biggest difference between IPv4 and IPv6 is

Answer 2

the number of bits reserved for an address
32 bits vs 128 bits. 2^128. 39 digit long number.

Question 3

Undecillion

Answer 3

We can give every atom on Earth its own IP address

Question 4

IPV6 addresses written as:

Answer 4

8 groups of 16 bits each, each group made up of 4 hexadecimal numbers.
2001:0db8:0000:0000:0000:ff00:0012:3456

Question 5

IPv6 notation method:

Question 6

Every IPv6 address beginning with 2001:0db8 is reserved for _____________. 18 quintillion addresses reserved just for this purpose

Answer 6

documentation and education, or books and courses

Question 7

Two rules for shortening IPv6 address:

Answer 7

remove any leading zeros from a group
any number of consecutive groups composed of just zeros can be replaced with two colons
(this can only happen once for any specific address, or else you wouldn’t know how many zeros were replaced by double ::)

Question 8

Reduce the size of 2001:0db8:0000:0000:0000:ff00:0012:3456

Answer 8

2001:db8:0:0:0:ff00:12:3456 (leading zeroes are removed)
2001:db8::ff00:12:3456 (that group of zeroes got replaced by ::)

Question 9

IPv6 loopback address:

Answer 9

0000:0000:0000:0000:0000:0000:0000:0001
::1

Question 10

IPv6 reserved address range FF00:: is reserved for:

Answer 10

multi-cast

Question 11

a way of addressing groups of hosts all at once

Answer 11

multicast

Question 12

FE80:: addresses are reserved for:

Answer 12

link-local unicast

Question 13

Allow for local network segment communications and are configured based upon a host’s mac address. used by an IPv6 host to receive their network configuration. The host’s mac address is run through an algorithm to turn it from a 48 bit number into a unique 64 bit number. It is then inserted into the address’ host ID.

Answer 13

link-local unicast addresses

Question 14

What is the line between network and host ID in IPv6? Still, network engineers may want to split up networks for admin purposes.

Answer 14

the first 64 bits of any IPv6 address is the network ID. The second is the host ID. any given network has space for 9 quintillion hosts.

Question 15

IPv6 subnetting uses _____ This is used to define a sub-net mask against the network ID portion of an IPv6 address.

Answer 15

the same cider notation that you’re already familiar with.