Tài liệu Networking Overview pdf

Networking Overview Copyright 2004 TMA Training Center 1 Contents 1 Introduction to Networking 1 . Introduction to Networking 2. OSI Model 3 TCP/IP P t l 3 . TCP/IP P ro t oco l 4. LAN 5. WAN 6 Other Concepts 6 . Other Concepts Exercises Copyright 2004 TMA Training Center 2 1. Introduction to networking Copyright 2004 TMA Training Center 3 What is networking?  In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hd d t ft h ar d ware an d compu t e r so ft ware. Copyright 2004 TMA Training Center 4 What is a network?  A network can consist of two computers td tth dk it it connec t e d t oge th e r on a d es k o r it can cons i s t of many smaller network connected together to form a bigger network across a continent . form a bigger network across a continent .  Networks can be categorized in several different ways  The geographic area it spans (LAN, WAN, …)  The protocol it uses (ATM, VPN, …) Backbone  Backbone  The main wire that connects nodes. The term is oftenusedtodescribethemainnetwork Copyright 2004 TMA Training Center 5 connections Communication Process Packets Protocols Source Destination Medium Copyright 2004 TMA Training Center 6 Address A ddress Communication Process (cont.)  A ddresses  Who are the source and the destination of a communication process?  Source Address, Destination Address  Media Wh i th iti tk l?  Wh ere i s th e commun i ca ti on t a k ep l ace ?  Cable, Fiber, Air Protocols  Protocols  How to make the communication process effectively?  Format Procedure Copyright 2004 TMA Training Center 7  Format , Procedure Evolution of networking standards SNA StandardStandard Proprietary Interconnectio Proprietary n Development Simplification Copyright 2004 TMA Training Center 8 TCP/IP DECNET 2. OSI MODEL Copyright 2004 TMA Training Center 9 OSI Model  Researched and developed by the ISO - (International Organization for Standardizations) and ITU-T (International Telecommunication Union- Telecommunications Standards Sector). 1977: establish a subcommittee to develop a  1977: establish a subcommittee to develop a communications architecture.  1984: publish ISO - 7498 the O pen S ystem  1984: publish ISO - 7498 , the O pen S ystem Interconnection (OSI) reference model. Copyright 2004 TMA Training Center 10 [...]...OSI model (cont.) A framework within which networking standards can be developed It provided vendors with a set of standards that ensured greater compatibility and interoperability between the various types of network net o k technologies that . Networking Overview Copyright 2004 TMA Training Center 1 Contents 1 Introduction to Networking 1 . Introduction to Networking 2. OSI. Center 2 1. Introduction to networking Copyright 2004 TMA Training Center 3 What is networking?  In the world of computers, networking is the practice