What is a Subnet Mask?

Subnet Mask

an ip possess two equipment, the community target and the number target. what is a subnet mask?A subnet mask distinguishes the ip in to the host and network address contact information (<network><host>). Subnetting further divides the variety section of an IP target into a subnet and variety address (<network><subnet><host>) if added subnetwork will become necessary. Use the Subnet Calculator to recover subnetwork details from IP address and Subnet Mask. It’s called a subnet mask since it is utilized to recognize network address of an IP address by perfoming a bitwise AND procedure on the netmask.

what is a subnet mask

A mask that is subnet a 32-bit number that masks an IP address, and splits the internet protocol address into circle address and host target. Subnet Mask is made by setting circle parts to any or all “1”s and environment host bits to all or any “0”s. Within a given system, two number addresses is arranged for special purpose, and cannot be assigned to offers. The “0” target is actually designated a system address and “255” is assigned to a broadcast target, and additionally they can not be assigned to offers.

Examples of commonly used netmasks for classed companies include 8-bits (Class A), 16-bits (lessons B) and 24-bits (lessons C), and networks that are classless as follows:

Lessons Address # of Offers Netmask (Binary) Netmask (Decimal)

CIDR /4 240,435,456 11110000 00000000 00000000 00000000 240.0.0.0

CIDR /5 134,217,728 11111000 00000000 00000000 00000000 248.0.0.0

CIDR /6 67,108,864 11111100 00000000 00000000 00000000 252.0.0.0

CIDR /7 33,554,432 11111110 00000000 00000000 00000000 254.0.0.0

A /8 16,777,216 11111111 00000000 00000000 00000000 255.0.0.0

CIDR /9 8,388,608 11111111 10000000 00000000 00000000 255.128.0.0

CIDR /10 4,194,304 11111111 11000000 00000000 00000000 255.192.0.0

CIDR /11 2,097,152 11111111 11100000 00000000 00000000 255.224.0.0

CIDR /12 1,048,576 11111111 11110000 00000000 00000000 255.240.0.0

CIDR /13 524,288 11111111 11111000 00000000 00000000 255.248.0.0

CIDR /14 262,144 11111111 11111100 00000000 00000000 255.252.0.0

CIDR /15 131,072 11111111 11111110 00000000 00000000 255.254.0.0

B /16 65,534 11111111 11111111 00000000 00000000 255.255.0.0

CIDR /17 32,768 11111111 11111111 10000000 00000000 255.255.128.0

CIDR /18 16,384 11111111 11111111 11000000 00000000 255.255.192.0

CIDR /19 8,192 11111111 11111111 11100000 00000000 255.255.224.0

CIDR /20 4,096 11111111 11111111 11110000 00000000 255.255.240.0

CIDR /21 2,048 11111111 11111111 11111000 00000000 255.255.248.0

CIDR /22 1,024 11111111 11111111 11111100 00000000 255.255.252.0

CIDR /23 512 11111111 11111111 11111110 00000000 255.255.254.0

C /24 256 11111111 11111111 11111111 00000000 255.255.255.0

CIDR /25 128 11111111 11111111 11111111 10000000 255.255.255.128

CIDR /26 64 11111111 11111111 11111111 11000000 255.255.255.192

CIDR /27 32 11111111 11111111 11111111 11100000 255.255.255.224

CIDR /28 16 11111111 11111111 11111111 11110000 255.255.255.240

CIDR /29 8 11111111 11111111 11111111 11111000 255.255.255.248

CIDR /30 4 11111111 11111111 11111111 11111100 255.255.255.252

Subnetting an IP network is always to split up a network that is big more compact multiple communities for reorganization and safety purposes. All nodes (offers) in a subnetwork discover all boxes transmitted by any node in a system. Abilities of a system was negatively impacted under big website traffic burden due to collisions and retransmissions.

Using a subnet mask to an IP address sets apart network address from variety target. The community pieces tend to be displayed from the 1’s from inside the mask, additionally the host bits include displayed by 0’s. Executing a bitwise rational AND operation throughout the ip utilizing the network is produced by the subnet mask target. For example, using the Class C subnet mask to our IP address 216.3.128.12 brings the appropriate network target:

IP:   1101 1000 . 0000 0011 . 1000 0000 . 0000 1100  (216.003.128.012)

Mask: 1111 1111 . 1111 1111 . 1111 1111 . 0000 0000  (255.255.255.000)

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 1101 1000 . 0000 0011 . 1000 0000 . 0000 0000  (216.003.128.000)