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Week 5 Assignment

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Name: Charles Buchanan Date: 12/07/2014
ISSC340 Week 5 Assignment (3% of Grade) APUS/Sanford

Lesson 5 Review: Networking Models, Traffic and Devices
The purpose of this activity is to reinforce what you have learned so far about local area networks technologies.

1. Describe the three modes of communication available on a network. (Minimum word count: 60)
Whenever we connect devices there must be away for one device to communicate to another. The three basic modes of operation annoy network are Simplex, Half-Duplex, and Full-Duplex operation. in simplex operation, a network cable or communication channel can only send information in one direction. Half-duplex operations are capable of sending information in both directions between nodes, but only one direction can be utilized at a time. Full-duplex operation is a connection between two devices and is capable of sending information in both directions simultaneously. 2. List the seven layers of the OSI model, including both layer number and name for each. (Minimum word count: 20)
The Open Systems Interconnect (OSI) model has seven layers. The application, presentation, session, transport, network, datalink, and physical layers. 3. Describe a protocol data unit (PDU). (Minimum word count: 30)
A protocol data unit (PDU) is an open system interconnection term use in telecommunications that refers to a group of information added or removed by a layer of the OSI model. Each layer uses protocol data unit (PDU) to communicate and exchange information, which can only be read by peer layer on the receiving device. 4. List three practical functions of the OSI model. (Minimum word count: 60)
The OSI practical functions are it describes the process of packet creation. It also explains the framework used to connect different types of systems, meaning it

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