====== Networking ======

===== IPv4 =====


^ Name ^ Old Name ^ Largest CIDR Block / Subnet mask ^
| 24Bit  | "Class A" | ''10.0.0.0/8'', ''255.0.0.0'' | 
| 20Bit  | "Class B" | ''172.16.0.0/12'', ''255.240.0.0'' |
| 16Bit | "Class C" | ''192.168.0.0/16'', ''255.255.0.0'' |


Reserved IPs:
  - ''127.0.0.0/8'' -> defines as ''localhost''
  - ''100.64.0.0/10'' (255.192.0.0) -> carrier grade NAT
  - ''0.0.0.0/8'' -> undefined
  - ''224.0.0.0'' to ''239.255.255.255''-> multicast

==== Netmasking ====


| 32 | 255.255.255.255 | 1  |
| 31 | 255.255.255.254 | 2  |
| 30 | 255.255.255.252 | 4  |
| 29 | 255.255.255.248 | 8  |
| 28 | 255.255.255.240 | 16 |
| 27 | 255.255.255.224 | 32 |
| 26 | 255.255.255.192 | 64 |
| 25 | 255.255.255.128 | 128 |
| 24 | 255.255.255.0   | 256 |
| 23 | 255.255.254.0 | 512 |


===== IPv6 =====

| fe80::/10 | link local |
| fc00::/7 | unique local |