Ipv6

Question 1

How long is an IPv6 address?

Answer 1

128 bits

Question 2

what are the rules to shorten and IPv6 address?

Answer 2

1. You can drop leading zeros in a hextet
2. You can replace running groups of zeros ONCE
3. Just make sure that the the outcome still shows 8 Hextets

Question 3

What is a Hextet?

Answer 3

is a 16 bit long hexadecimal part of a IPv6 address.

Question 4

How many Hextets are in an IPv6 address?

Answer 4

8

Question 5

Each Hextet “character” is how many bits long?

Answer 5

4 or a Nibble

Question 6

what command on a router can you input to show ipv6 interfaces?

Answer 6

show ipv6 interface brief

Question 7

What are the characteristics of an unspecified ipv6 adress?

Answer 7

this address acts like an APIPA

all zeros in the address

ipv6 = ::/128

Devices does not have an address so it sends a multicast address and since the multicast is a layer 3 address - it also sends its MAC so the router can reach it by mac

/128

Question 8

What is a Loopback ipv6 Address?

Answer 8

127 zeros and last bit is a 1

ipv6 - ::1/128

equivalent to 172.0.0.1 - Ping local device

/128

Question 9

What is a Global ipv6 Address?

Answer 9

is the closes to a public address in ipv4

the first nibble can be a 2 or 3
0010
0011

so the range of the internet addresses is 2000- 3FFF
This is only the first HEXTET

/3

Question 10

What is a multicast ipv6 Address?

Answer 10

1st 8 bits all 1s or the first 2 nibbles as 1s or the first 2 characters in Hex as FF

Example ivp6
FF00:

Question 11

What is a link Local Ipv6 Address?

Answer 11

every device will generate an address if everything else fails

first 10 bits are 1111 1110 10 /10
Hex - FE80

Rules - EUI-64

Take the device MAC and split it in the middle

Add FFFE

Split the 7th bit

Add to the rest of the address FE80::______/64

Question 12

Why is a link local address in ipv6 useful?

Answer 12

routers use this address since its a more stable address to establish neighbor relationships.