Network Addressing. Internet Protocol Address An IP (Internet Protocol) address is a unique identifier for a node or host connection on an IP network.

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Presentation transcript:

Network Addressing

Internet Protocol Address An IP (Internet Protocol) address is a unique identifier for a node or host connection on an IP network. An IP address is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (known as octets) separated by decimal points. This is known as "dotted decimal" notation.

Example IP Address Example: It is sometimes useful to view the values in their binary form

Network and Node or Host Every IP address consists of two parts, one identifying the network and one identifying the node. The Class of the address and the subnet mask determine which part belongs to the network address and which part belongs to the node address.

Class A Class A addresses begin with 0xxx, or 1 to 126 decimal. Class A -- NNNNNNNN.nnnnnnnn.nnnnnnnn.nnnnnn nn N= Network n=node Subnet Mask

Class B Class B addresses begin with 10xx, or 128 to 191 decimal. Class B -- NNNNNNNN.NNNNNNNN.nnnnnnnn.nnn nnnnn N= Network n=node Subnet Mask

Class C Class C addresses begin with 110x, or 192 to 223 decimal. Class C -- NNNNNNNN.NNNNNNNN.NNNNNNNN.n nnnnnnn N= Network n=node Subnet Mask

Loopback Address For testing the TCP/IP of a host

Subnet Masks Class A Class B Class C