Ip Addresses And Subnet Masks - Alcatel Speed Touch Wireless User Manual

11.1.1

IP Addresses and Subnet Masks

What is an IP address
Network part, subnet
part and host part
Example: network and
subnetwork parts
3EC 17766 AAAA TCZZA Ed. 01
An IP address is a 32 bit number that uniquely identifies
a computer (i.e. an networking interface) on your network or the
Internet.
This number is commonly represented in dotted quad" format.
Each octet (8 bits) is represented as a decimal number.
Dots are used as octet separators (e.g. 10.0.0.138).
Historically, an IP address consists of two parts: a network part
and a host part.
The network part identifies the network on which a PC resides. The
host part identifies a particular PC on a given network.
The dividing line between the network part and the host part can
be derived from the netmask or subnet mask.
The 1 bits in the Subnet Mask represent the contiguous leading
bits of the IP address that has network significance.
For example, an IP address is 172.16.0.2 and the subnet mask is
255.255.255.0.
The binary notation of the IP address equals:
10101100.00010000.00000000.00000010
The dotted quad notation of the subnet mask equals:
11111111.11111111.11111111.00000000
Since all the 1 bits of the subnet mask have network significance,
the network part of the IP address would be:
10101100.00010000.00000000.00000010
AND 11111111.11111111.11111111.00000000
10101100.00010000.00000000
or
172.
The subnet part is the remaining part
or
11 Networking Services - IP
16. 0.
00000010
2.
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