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.
0:0:0:0:0:0:0:0
Equals ::. This is the equivalent of IPv4’s 0.0.0.0 and is typically
the source address of a host before the host receives an IP
address when you’re using DHCP- driven stateful configuration.
0:0:0:0:0:0:0:1
Equals ::1. The equivalent of 127.0.0.1 in IPv4.
0::FFFF:192.168.100.1
This is how an IPv4 address would be written in a mixed IPv6/ IPv4 network environment.
2000::/3
The global unicast address range allocated for Internet access.
FC00::/7
The unique local unicast range.
FE80::/10
The link- local unicast range.
FF00::/8
The multicast range.
3FFF:FFFF::/32
Reserved for examples and documentation.
2001:0DB8::/32
Also reserved for examples and documentation.
2002::/16
Used with 6to4 tunneling, which is an IPv4- to- IPv6 transition system. The structure allows IPv6 packets to be transmitted over
an IPv4 network without the need to configure explicit tunnels.
SLAAC
Stateless Address Autoconfiguration
7th bit
Dual Stacking
This is the most common type of migration strategy because, well, it’s the easiest on us— it allows our devices to communicate using either IPv4 or IPv6.
6to4 Tunneling
6to4 tunneling carrying IPv6 packets over a network that’s still running IPv4.
CIDR
Classless Inter- Domain Routing
Inside local
Name of the inside source address before translation
Outside local
Name of the destination host before translation
Inside global
Name of the inside host after translation
Outside global
Name of the outside destination host after translation