?– The ?¬?rst few bits of an address determine the class.
?– Certain IP addresses (network and broadcast) are reserved and cannot be assigned to
individual network devices.
?– Internet hosts require a unique public IP address, but private hosts can have any valid
private address that is unique within the private network.
?– DCHP assigns IP addresses and parameters to host devices automatically.
?– DNS is a TCP/IP application that resolves domain names like Cisco.com into IP
addresses to be used by the application.
?– Hosts provide tools that can be used to verify the IP addresses of the device. Windows
tools are Network Connections and IPCONFIG.
Understanding TCP/IP??™s Transport and Application Layers 63
Understanding TCP/IP??™s Transport and Application
Layers
When computers communicate with one another, certain rules, or protocols, are required to
allow them to transmit and receive data in an orderly fashion. Throughout the world, the
most widely adopted protocol suite is TCP/IP. Understanding how TCP/IP functions is
important for a larger understanding of how data is transmitted in network environments.
The way in which IP delivers a packet of data across a network is a fundamental concept in
the TCP/IP architecture used in large networks.
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