Chapter 13: IPv6 Flashcards
3 Benefits of IPv6
1) More IP addresses
2) Improved Security
3) More efficient routing scheme
How many bits does one hexadecimal character represent?
4
Rules for IPv6 address compression
1) Leading zeroes can be dropped (00CF becomes CF)
2) You can use a pair of colons (::) to represent a string of consecutive groups with a value of zero. However, only one double colon can be used per address
Link-Local Address
The address that a computer running IPv6 gives itself after first booting.
The first 64 bits of a link local address
FE80::/64
otherwise written as
FE80:0000:0000:0000
Name of the second 64 bits of an IPv6 address
Interface Identifier
How is the Interface Identifier determined?
Either by generating a random number or using the device’s MAC address to create a 64 bit number.
How long is an IPv6 address?
128 bits
Max length of an IPv6 subnet
64 bits
Unicast Address
A unique IP address that is exclusive to a single system
Multicast Addresses
A set of reserved addresses designed to go only to certain systems.
If an IPv6 system sends out a multicast to the address _______, only routers read the message while everyone else ignores it. (Router solicitation message)
FF02::2
Anycast
A method of addressing groups of computers as though they were a single computer. Routers send incoming packets to the closest of the computers in the group.
Global Unicast Address
A second IPv6 address that every system needs in order to get on the Internet.
Prefix Delegation
An IPv6 router configuration that enables it to request an IPv6 address block from an upstream source, then to disseminate it to local clients.
