ipv4 ipv6 Flashcards
Class A reserved
10.0.0.0 through 10.255.255.255 (prefix /8)
Class B reserved
172.16.0.0 through 172.31.255.255 (prefix /12)
Class C reserved
192.168.0.0 through 192.168.255.255 (prefix /16)
Class A
1-126
Class B
128-191
Class C
193-223
Class D
224-239 Used for multicast addresses
Class E
240-255 For scientific purposes
APIPA
169.254.0.1 - 169.254.255.254
Unicast
Packets addressed to a unicast address are delivered to a single interface, same as in IPv4. For load balancing, multiple interfaces can use the same address.
Global Unicast Addresses
These are your typical publicly routable addresses, and they’re used the same way globally unique addresses are in IPv4.
Link-Local Addresses
These are like the APIPA addresses in IPv4 in that they’re not meant to be routed and are unique for each link (LAN)
Unique Local Addresses
These addresses are also intended for nonrouting purposes, but they are nearly globally unique, so it’s unlikely you’ll ever have one of them overlap with any other address.
Multicast
Again, as in IPv4, packets addressed to a multicast address are delivered to all interfaces identified by the multicast address. Sometimes people call them one-to many addresses.
Anycast
Like multicast addresses, an anycast address identifies multiple interfaces, but
there’s a big difference: The anycast packet is delivered to only one address— actually,
to the first IPv6 address it finds defined in terms of routing distance. And again, this
address is special because you can apply a single address to more than one interface.