Wednesday, October 16, 2013
What is an IP Address And Bacis About it.
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A complete tutorial about IP Address
Let us begin with IP Addresses.
What is an IP Address?
► An Internet Protocol address is a
numerical label assigned to each
device (e.g., computer, mobile phone)
that is connected to a computer
network that uses the Internet
Protocol for communication.
► An IP address is used for two
purposes:
1) To identify whether the interface is
host or network.
2) To determine the location of the
device.
► IP Versions: IPv4 and IPv6.
Although IPv4 is the earlier version,
it is the most commonly used
version.
► IPv4 is a 32-bit decimal number
while IPv6 is 128-bit number.
► IPv4 is normally written as four
numbers between 1 and 255, each
separated from the other by a
decimal point.
This standard is called as DOTTED-
DECIMAL NOTATION.
► Ex: 115.241.40.93
► There are countless IP addresses in
today's world!
------------------------------
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What is the purpose of IP Address
Classes?
Each IP Address Class provides the
following information:
► Class A: First 8 bits → NETWORK ID
& remaining 24 bits → HOST ID
► Class B: First 16 bits → NETWORK
ID & remaining 16 bits → HOST ID
► Class C: First 24 bits → NETWORK
ID & remaining 8 bits → HOST ID
► Class D: It represents a 32-bit
multicast group ID.
► Class E: It is currently not being
used. (NO need)
► For example,
Let us consider the IP Address
203.43.21.12
We know that it belongs to Class C.
Therefore, the NETWORK ID is
203.43.21 and the HOST ID is 12.
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