Setting Computer Networks 3 PDF

SET-UP COMPUTER NETWORKS COMPUTER SYSTEM SERVICING 3 OBJ ECTIV ES Understand and Identify Network Components Configure Network Devices and Connectivity Set Up and Manage Computer Networks T OPICS 1. Introduction 2. Definition of Network and the basic categories 3. Different...

SET-UP COMPUTER NETWORKS COMPUTER SYSTEM SERVICING 3 OBJ ECTIV ES Understand and Identify Network Components Configure Network Devices and Connectivity Set Up and Manage Computer Networks T OPICS 1. Introduction 2. Definition of Network and the basic categories 3. Different Network Hardware 4. Network Configuration Topologies INTRODUCT ION This module contains information and suggested learning activities on Computer Systems Servicing. Completion of this module will help you better understand the succeeding module on Configuring and Maintaining Computer Systems.  WHAT IS N ET WORK ? 5 NETWORK A network is a collection of computers and related equipment (printers, webcams, game consoles, etc.) connected so that data can move between them. Even if you have a single computer, it looks to the Internet as part of a network. The Internet, then, is a network of networks. 6 NETWORK The majority of networking, is done using the internet standard. At the center of the basic diagram of a wired network is either a hub or a switcher and computers are connected to the hub, much like spokes of a wheel or star. Each connection at the hub is called a port. 7 THREE BASIC NETWORK CATEGORIES *LOCAL AREA NETWORK (LAN) *METROPOL ITAN AREA NETWORK (MAN) * W I D E A R E A NE T WO R K (WAN) 8 LOCA L AR EA NETWORK (LAN) The smallest of the three network types, consist of PC’s connected together within a limited area, such as within the same building, floor or department. METROP OLIT AN AR EA NETWOR K (MAN) Are network that spans no more than 50 miles. It is design to connect LAN’s spanning a town or city. WIDE A REA NETWORK (WAN) Used to distribute information thousand of miles among thousands of users. NETWORK HARDWARE DEVICES 12 NETWORK INTERFACE CARD (NIC) - A printed circuit board, an adapter that plugs into the computer's motherboard when connected with a network cable, provides the physical link between your computer and the network. 13 NETWORK HUB - A hardware device that all PCs on a network are connected to by cabling. The hub manages receiving and transmitting data from networked services. 14 WIRELESS HUBS - This kinds hub are for the home. 15 KINDS OF HUBS * STANDALONE HUBS *STACKABLE HUBS *MODULAR HUBS 16 STANDALONE HUBS Are single products with a number of ports. It is usually including some method of linking them to other standalone hubs for network expansion. 17 STACKABLE HUBS Work just like standalone hubs, except that several of them can be "stacked" (connected) together, usually by short lengths of cable. 18 MODULAR HUBS Are popular in networks because they are easily expanded and always have management option. It is purchased as chassis, or card cage, with multiple card slots, each of which accepts a communication card, or module. 19 3 BASIC HUB TYPES * PASSIV E HUBS * A CTIV E HUBS * INTELLIGENT HUBS 20 PASSIVE HUBS - Simply connects various cables. 21 ACTIVE HUBS - Amplify or boost signals 22 INTELLIGENT HUBS - Select which path a specific signal will travel 23 NETWORK HARDWARE DEVICES REPEATER - A device that strengthen signals and allow then to stay clear over longer distances. 24 NETWORK BRIDGE - Divides network into smaller, more manageable sections helping traffic. 25 NETWORK SWITCH - It helps determine how data moves over large networks. 26 NETWORK CABLES - Are the transmission media to transfer data from one device to another. - A commonly used network cable is category 5 cable with RJ-45 connector. 27 ROUTER -A device that forwards data packets between Local or Wide Area Network groups 28 ROUTER -A device that forwards data packets between Local or Wide Area Network groups 29 NETWORK CONFIGURATION TOPOLOGIES N E T W O R K T O P O L O GI E S H A V E GO N E T H R O U GH M A N Y E VO L U T I O N S S I N C E T H E FIRST NETWORK WAS INTRODUCED. AFTER T H E D E VE LO P M E N T O F N E W T EC HN O LO G I ES A N D M E T H O D S , B ET T ER , M O RE E F F I C I E N T D E S I G N S H A V E BE EN I N T RO D U C E D. 30 THREE MAIN TOPOLOGIES THAT ARE USED *BUS NETWORK *RING NETWORK *STAR NETWORK 31 BUS NETWORK - A bus network is a line of computers connected together by a cable. The cable is called the bus. The bus must be terminated at both ends. 32 BUS NETWORK - Datacan flow between machines, and each machine has some of the software used by the entire network. This can lead to data clashes if the same request is made at the same time by two machines. Ethernet uses a modified type of bus network. 33 RING NETWORK - A ring network is a bus network that has been attached at both ends. The data in a ring network travels in 1 direction only. Data clashes can occur for the same reasons as in a bus network. 34 STAR NETWORK - A star network is a network where each machine is connected to a central machine, called a server. The server holds all the software, and the other machines, called nodes, request the software from it. Since the server receives all the requests, it can handle them one by one, and there are no data crashes. It is possible to have a star network spawn another star network. 35 T HA NK YOU