The OSI Model

Chapter summary: DHCP assigns IP addresses by using automatic, manual, or dynamic allocation; DNS resolves host and domain names into IP addresses; WINS resolves NetBIOS names into IP addresses; ping tests whether one computer running TCP/IP can communicate with another computer on the network;...and other contents.

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Communication Architecture Strategy for connecting host computers and other communicating equipment. Defines necessary elements for data communication between devices. A communication architecture, therefore, defines a standard for the communicating hosts. A programmer formats data in a manner defined by the communication architecture and passes it on to the communication software. Separating communication functions adds flexibility, for example, we do not need to modify the entire host software to include more communication devices....

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Transmission Control Protocol (TCP) TCP is a connection-oriented transport mechanism that resides at Layer 4 of the OSI model.

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Application filtering is one of the most difficult types of filtering that firewalls perform, because it requires the firewall to process the data at the application layer (Layer 7) of the OSI model

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