Senin, 09 September 2019
Rabu, 15 Mei 2019
IP Private
Private IPv4 addresses
The Internet Engineering
Task Force (IETF) has directed the Internet Assigned
Numbers Authority (IANA) to reserve the following IPv4 address ranges for
private networks:
|
RFC1918 name
|
IP address range
|
number of addresses
|
host id size
|
mask bits
|
classfuldescription
|
|
|
24-bit block
|
10.0.0.0 – 10.255.255.255
|
16777216
|
10.0.0.0/8 (255.0.0.0)
|
24 bits
|
8 bits
|
single class A network
|
|
20-bit block
|
172.16.0.0 – 172.31.255.255
|
1048576
|
172.16.0.0/12 (255.240.0.0)
|
20 bits
|
12 bits
|
16 contiguous class B networks
|
|
16-bit block
|
192.168.0.0 – 192.168.255.255
|
65536
|
192.168.0.0/16 (255.255.0.0)
|
16 bits
|
16 bits
|
256 contiguous class C networks
|
Although the standard for class A and class B
networks specify 8- and 12-bit masks respectively, it is common to subdivide
these and assign other masks internally, resulting in a number of smaller
subnets (e.g. 10.0.0.0/24, with room for thousands of 254-host subnets).