Importance-what is a subnet mask?

What is a Subnet Mask?

what is a subnet mask

Subnet Mask

an IP address possess two components, the circle target in addition to number address. A subnet mask distinguishes the internet protocol address into the host and network details (<network><host>). Subnetting further divides the number part of an IP target into a subnet and number address (<network><subnet><host>) if further subnetwork will become necessary. Use the Subnet Calculator to retrieve subnetwork suggestions from IP address and Subnet Mask. It is called a subnet mask because it is utilized to recognize circle address of an IP target by perfoming a operation and bitwise on the netmask.

A mask that is subnet a 32-bit amounts that goggles an IP address, and splits the ip into community target and number target.what is a subnet mask? Subnet Mask is created by establishing circle bits to all the “1”s and style host bits to all “0”s. Within a given system, two variety address include booked for special-purpose, and cannot end up being allotted to hosts. The “0” target is actually designated a network target and “255” is assigned to a broadcast target, and they should not be allotted to hosts.

Samples of commonly used netmasks for classed networks include 8-bits (Class A), 16-bits (lessons B) and 24-bits (Class C), and classless communities tend to be as follows:

Course 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 internet protocol address system is to split a network that is big modest several systems for reorganization and protection purposes. All nodes (hosts) in a subnetwork read all packages carried by any node in a network. Results of a network is actually negatively impacted under heavy traffic load because of crashes and retransmissions.

Using a subnet mask to an IP address sets apart system target from variety target. The network pieces are symbolized of the 1’s for the mask, and also the number parts tend to be symbolized by 0’s. Doing a bitwise sensible AND procedure from the internet protocol address utilizing the subnet mask brings the community address. For example, using the Class C subnet mask to your IP address 216.3.128.12 create the network address that is following

internet protocol address:   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)

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