Intro. To telecommunication Dr. Muhammad Rafiq Section: 201 Computer Networks Done by: Ebtihal.M AL-Qurashi 200800747 Dalal AL-Dossary 200801506 Woud Saad 200800737

Objectives… The objective of this project is to get knowledge about the computer networking and to realize its importance and benefits. Get knowledge about the common types of computer network (LAN, WAN, and MAN) in terms of definition, types, advantages and disadvantages. Know the differences between (LAN, WAN, and MAN) to know when to choose what.

Outline… I. Introduction. II. Body: II.1. Definitions. II.1.1 Definition of Local Area Network (LAN) II.1.2 Definition of Wide Area Network (WAN) II.1.3 Definition of Metropolitan Area Network (MAN) II.2. Types. II.2.1 LAN’s Types II.2.2 WAN’s Types & communication techniques. II.2.3 MAN’s Technological Types. II.3. Advantages & disadvantages. II.3.1 LAN’s advantages & disadvantages. II.3.2 WAN’s advantages & disadvantages. II.3.3 MAN’s advantages & disadvantages. II.4. Differences between LAN, WAN, and MAN III. Conclusion

I. Introduction * Computer network sets of computers or devices connected to each other with the ability to exchange data. Wired Networking Wireless Networking

* The Importance Of Computer Network Facilitating communications. Sharing resources. Getting Information. Accomplishing tasks. Students researches. Job applications. Business communications.

II.1. Common Types of Computer Network Local Area Network (LAN). Wide Area Network (WAN). Metropolitan Area Network ( MAN).

II.1.1. Local Area Network * It is an Interconnection of small devices covering a short distance or small geographical and physical area. Its use in a personal computers in home offices, or schools.

II.1.2. Wide Area Network (WAN) * It is a collection of local area networks and other network types though a router. It covers a large geographical distance.

II.1.3. Metropolitan Area Network (MAN) *Interconnects a number of (LANs) using a high-capacity backbone technology. Its a large computer network that usually spans a city or a large campus. its geographic scope falls between a WAN and LAN.

II.2 Types of LAN, WAN & MAN II.2.1 Types of LAN The basic type of LAN is connected by Ethernet cables to a router or hub in which modern routers usually integrate hub. There are two main types used of LAN which are : 1-The wired LAN (has two common connection standards; 100BASE-T and 1000BASE-T). 2- The wireless LAN (can transmit data through walls, floors and ceilings without having to drill holes).

II.2.2Types & communication techniques of WAN: WAN’s Types: Private Network. Integrated Services Digital Network. Value Added Service. PSDN. PSTN.

WAN’s Communication Techniques: Wireless WAN.  Cell Relay. Packet Switching. Circuit Switching. Leased Line.

II.2.3. Types of MAN: Asynchronous Transfer Mode (ATM). Fiber Distribution Data Interface (FDDI). Switched multi megabit data service (SMDS).

II.3. Advantages and Disadvantages of LAN,WAN, and MAN As usual, every network, system or device has advantages and disadvantages in using it which are stated by expertise people or users who had experienced it. Accordingly, LAN, WAN, and MAN also have advantages and disadvantages.

II.3.1. Advantages and Disadvantages of LAN Cheaper costs. Easier to control. Not much is required in setting up security to dispel hackers. Workstations can share peripheral devices. Do not necessarily need their own hard disk or CD-ROM drives. User can save their work centrally on the network’s file server. Users can communicate with each other and transfer data between workstations very easily. One copy of each application package can be loaded onto the file and shared by all users. Covers a small geographical region Limitation in exchanging information. Consumes a lot of power (it has to be on all the time for a good LAN). Special security measures are needed to stop users from using programs and data that they should not have access to. Networks are difficult to set up and need to be maintained by skilled technicians. If the file server develops a serious fault, all the users are affected, rather than just one user in the case of a stand-alone machine.

II.3.2. Advantages and Disadvantages of WAN Covers a large geographical area (businesses can connect long distance). Allows connecting workstations to share resources and software. Messages can be sent very quickly to anyone else on the network. Everyone on the network can use the same data. This avoids problems where some users may have older information than others. High costs. More associated errors. Require to invest in a good firewall system to avoid disruption by hackers. Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed. Low security (Vulnerable to hackers or other outside threats) Information may not meet local needs or interests.

II.3.3. Advantages and Disadvantages of MAN More cable required for a man connection from one place to another. Increases the efficiency of handling data. Increase the speed of transferring data. Saves the cost attached to establish a wide area network. Cost effective by Sharing of resources such as printers. Offers centralized management of data. Enables people to connect many fast LANs together. Easy to implement links. Flexibility of the proposed service. High security. The large the network becomes difficult to mange. Difficult to make the system secure from hackers and industrial espionage.

II.4. Differences between LAN, WAN, & MAN There are three basic types of network, the LAN, WAN and MAN. The differences between LANs, WANs, and MANs are indeed greater than just in term of size. There are differences in network topology, hardware requirements, software requirements as well as technical specifications and cost.

Differences between LAN, WAN, & MAN Connection in small and physical area. Best LAN types used with Ethernet. Faster than WAN. Cheaper. More likely need password validation as it will have specific user rights. More private. Hardware focus on sharing resources. Operate on peer to peer Cover a larger geographic area than LAN . Used with in internet & Ethernet. Higher speed. Competitive price Need password validation as it will have specific user rights. High security. Hardware focus on data transmission. Operated by organizations and public utilities Cover a largest distance. Best WAN types used with Internet. Less speed than LAN. More expensive. Less likely need password validation as it will have specific user rights. Less private. Hardware focus on communication. Operate on client to server.

III. Conclusion: The networks of LAN, WAN, and MAN provides lots of benefits that help users to communication with the world around them. The network has become a vital part of our life to accomplish tasks. Actually, getting knowledge of the 3 common networks LAN, WAN & MAN, which are hopefully explained very well in this project, and other types of networks help to know how to use them better and know when to choose what type with realizing their benefits, types, differences, and advantages and disadvantages of each.

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