Introduction to the Network Communication Devices Essay

In this tutorial you forget learn get the basic entry to cyberspace cheats much(prenominal) as nic adapters, routers, hubs, switches, modems, colloquy seams, lan/wan routers, approach and other(a) contrivances. A network is consists of a larger number of the parley devices. The simplest device that is used in the discourse is the NIC adapter which is attached with the each ready reckoner in a network. If you want to build a LAN, you bequeath need to have computers, hubs, switches, network adapters, UTP/STP wires, routers, internal/external modems, connectors, bloodline testers and clipping tool. On the other hand if you need to build WAN, you will need to have routers, switches, dedicated or leased telephone lines such as ISDN lines, frame relay connection and other types of wan communication connections. There argon different communication mediums such as Ethernet cables, crap wire, coaxial cable, part optic cables, leased telephone lines and ever stock is also a communication medium for the satellite communication. The most rough-cut networking medium is the LAN is the Ethernet cable (UTP/STP), which is used in the star topology. Hub is a central device of a network and every computer in a network is directly connected with the hub.If the hub fails to work, the communication betwixt the computers dinero till the hub again starts working. Hub broadcasts the data to its every port, and then finding the bound computer, the data move toward it. The switch is an advance form of the hub similar in functions but the advanced switches has a switching table in them. A advanced switch stores the MAC address of every attached computer and the data is only direct to the destined computer, unlike the hubs where data is sent to all ports. A router is a key device in the network communication and wan communication system. A router has software called routing table and the outset and destination addresses are stored in the routing table. A router connects two logically and physically different networks. Router finds the IP address of the next hop (next router) and the data is sent toward it and so on. The well known routers developing companies are Cisco systems, Nortel, DLink and others. all(prenominal) ISP, banks, corporate offices and multinational companies use routers for LAN and WAN communications andcommunication in their private networks. A gateway sight be device or software in a network. A gateway device connects the LAN with the internet. A gateway is directly exposed to the internet so it should be securely configured and in and out traffic should be monitored. If you are using digital subscriber line connection, you must need a DSL modem in your network. The telephone line is connected with the DSL modem and UTP/STP cable attaches your computer with the DSL modem. Modems are the devices that are used to modulate and pull the data. They convert analogue signals to digital and digital signals to analogue so tha t signals can travel on the telephone lines. There are certain types of the cables that are used to connect two or more than computers in a network. Fiber optic cable acts as a backbone between the ISPs and corporate offices. Data travels at the speed of light on the fiber optic cables. The cost and the installation cost of the fiber optic cable is very high but it is becoming very popular in the home networking and LANs also. In the local area networking, 10baseT/CAT5 cable is most commonly in use. A server is a computer in network that provides services to the client computers such as logon requests processing, files access and storage, internet access, belief access and many other types of services. Servers are mostly equipped with unnecessary hardware such as plenty of external memory (RAM), more data store capacity (hard disks), high processing speed and other features.