est_320_Lect_4_Networking_2_28_08

6 presentation layer handles formatting issues 5

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ng issues 5 Session Layer Requests a connection, as per the end user, to a network. Also responsible for disconnecting from the network. 4 Transport Layer - Breaks the message into blocks and is also responsible for monitoring quality of the communication channel. 3 Network Layer creates routing messages and is concerned with the networks that will be used to send data 2 Data Link Layer gathers bits data bits into a block and sent to the physical layer 1 Physical Layer - sends a bit stream over a transmission medium FIGURE 7-1: LAYERS OF THE OPEN SYSTEMS INTERCONNECTION MODEL FIGURE 7-2: TRANSFERRING A FILE UNDER THE OSI MODEL FIGURE 7-3: MULTIPLE NODE COMMUNICATIONS UNDER OSI Protocols and Standards Key elements of a Protocols are: Syntax: structure or format of data. ie. First 8 bits of data represent the sender's address, the next 8 bits are the address of the receiver and the remaining bits represent the message. Semantics: meaning of each segment of bits. Does an address tell us the route to be taken or does it de...
View Full Document

This note was uploaded on 04/07/2008 for the course EST 320 taught by Professor Taveras during the Spring '08 term at SUNY Stony Brook.

Ask a homework question - tutors are online