SubNetting – What is Subnetting?
The
process of subnetting involves dividing a network up into smaller networks
called subnets or sub networks. Each of these subnets has its own specific
address. To create these additional networks we use a subnet mask.
The subnet mask simply determines which portion of the IP address
belongs to the host. The subnet address is created by dividing the host address
into network address and host address.
The
network address specifies the type of subnetwork in the network and the host
address specifies the host of that subnet. Subnets are under local
administration. As such, the outside world sees an organization as a single
network and has no detailed knowledge of the organization’s intema1 structure.
Subnetting provides the network administrator with several benefits, including
extra flexibility, more efficient use of network address and the capability to contain
broadcast traffic. A given .network address can be broken up into may
subnetworks. For example, 172.16.1.0, 172.16.2.0, 172.16.3.0 and 172.16.4.0 are
all subnets within network 171.16.0.0.
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