www.kashifpaf.greatnow.com 1 chapter 24 tcp/ip. 2 an internet according to tcp/ip

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Chapter 24

TCP/IP

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An Internet According to TCP/IP

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TCP/IP and the OSI Model

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Internet Address

The physical addresses (contained on NICs)that identify individual devices.

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19.2 Addressing19.2 Addressing

Internet Address

Classful Addressing

Supernetting

Subnetting

Classless Addressing

Dynamic Address Configuration

Network Address Translation

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An IP address is a 32-bit address.

NoteNote::

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The IP addresses are unique and universal.

NoteNote::

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Internet Classes

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Finding the address class

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Classes

a. 10011101 10001111 11111100 11001111 Class B

b. 11011101 10001111 11111100 11001111 Class C

c. 01111011 10001111 11111100 11001111 Class A

d. 11101011 10001111 11111100 11001111 Class D

e. 11110101 10001111 11111100 11001111 Class E

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IP Addresses in Decimal Notation

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Class Ranges of Internet Addresses

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Find the netid and the hostid for each address:

Address Class NetidHostid

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Find the network address for each address:

Address Class

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Example Example

Find the class of each address:

a. 227.12.14.87

b. 252.5.15.111

c. 134.11.78.56

SolutionSolutiona. The first byte is 227 (between 224 and 239); the class is D.b. The first byte is 252 (between 240 and 255); the class is E.c. The first byte is 134 (between 128 and 191); the class is B.

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Blocks in class A

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Millions of class A addresses are wasted.

NoteNote::

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Blocks in class B

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Many class B addresses are wasted.

NoteNote::

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The number of addresses in class C is smaller than the needs of most

organizations.

NoteNote::

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Blocks in class C