Chapter 13: IPv6

Question 1

Describe IPv6

Answer 1

• expands the IP address space
• makes IPsec support standard
• link local addressing

Question 2

Describe the IPv6 Notation

Answer 2

2001: 0000:0000:3210:0800:200C:00CF:1234
- uses colon as a separator
- each group is a hexadecimal number between 0000 and FFFF.
- leading zeros can be dropped.
- :: represents string of consecutive groups with value of zero.

Question 3

What is the IPv6 loopback address?

Answer 3

::1

Question 4

Describe the link-local address.

Answer 4

• don’t have a single ip address unless network isn’t connected to a router.
• always begin with FE80::/64 FE80:0000:0000:0000:

Question 5

Describe the IPv6 subnet Mask.

Answer 5

• last 64 bits generated by the NIC
• max of 64 bits for subnet.
• IANA passed out /32 to big ISPs

Question 6

what type of address is a link-local address?

Answer 6

-unicast

Question 7

Describe multicast addresses.

Answer 7

FF02::1 all routers
FF02::2 all routers
FF02::1::FFXX:XXXX solicited node

Question 8

What is a root hint?

Answer 8

-file that DNS servers keep ip addresses of root servers.

Question 9

What is a global unicats adddress?

Answer 9

• used to get on the internet

- assigned from default gateway

Question 10

Does IPv6 have default routers?

Answer 10

No. tier-one routers with no default route.

-48 bit prfix from upstream router and 16 bit subnet from default gateway and 64 bit unique number.

Question 11

Describe IPv6 router advertisements.

Answer 11

-Do not pass out DNS server info.