IPV6 Flashcards
How long are Ipv6 addressses?
128 bits
How many bits does one digit represent in an ipv6 address?
4
In one group of four digits, how many bits are there?
16
What is a network identifier and its length?
This identifies… the network you’re on. 64 bits.
It is pre-set by your ISP, usually, and the last four digits of this 64bit long section usually holds your subnet mask.
Is ipv6 case sensitive?
No
What generates the ipv6 interface id?
The OS, or, on older PCs, the MAC address.
What is the start of the link local address?
fe80:: /64
What is the ipv6 loopback address?
::1
What is the address you use on the internet called?
Global address
How does multi cast work?
Hosts sign up to receive data from specific addresses, and accept packets sent to said address.
There is an all nodes multi cast, an all routers multi cast, and a solicited node multicast address. What are these?
ff02::1
ff02::2
ff02::1:ffxx:xxxx
How does anycast work?
Any computer signed up to the address can receive the data, but only one computer will take it.
All hosts share an anycast address, and when data comes in either pre-set metrics or the best connection available will determine the computer that takes the data.
What is the name of the process by which IPv6 hosts find each other’s MAC address?
Neighbour Discovery protocol
During NDP, what is the stage in which a host responds to a MAC address request called?
Neighbor Advertisement
During NDP, what is the stage in which a host sends a frame to the multicast address in search of a specific host’s MAC called?
Neighbor Solicitation
How does an ipv6 machine start communicating with a router?
By sending a Router solicitation frame to the router specific multicast address (ff02::2)
How does a router respond to an ipv6 solicitation?
With a router advertisement sent to the all nodes address (ff02::1). This also includes data such as the network prefix used in the global address, DNS information and more.
What is a redirect frame in regards to NDP
When a router refers a host to a different router.
What is SLAAC?
Stateless address autoconfiguration - The ipv6 equivalent of DHCP.
-Takes prefix from router and combines it with link local address
-Uses Neighbor discovery protocol to decide upon a link local (sends solicitation to node multicast to verify to it isn’t taken)
