Networking hardware - Network hardware - GCSE Computer Science Revision - BBC Bitesize 1632984104222 PDF

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Hàrdware and their functions and importance...

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Network hrdwre Prt of Computer Science

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Networking hrdwre Computers need networking hrdwre in order to connect to ech other. Routers , hubs , switches nd bridges re ll pieces of networking equipment tht cn perform slightly different tsks. A router cn oen incorporte hubs, switches nd wireless ccess within the sme hrdwre.

Routers A router cn form  LAN by connecting devices within  building. It lso mkes it possible to connect different networks together. Homes nd businesses use  router to connect to the internet. A router cn oen incorporte  modem within the hrdwre.

Modems A modem enbles  computer to connect to the internet over  telephone line. A modem converts digitl signls from  computer to nlogue signls tht re then sent down the telephone line. A modem on the other end converts the nlogue signl bck to  digitl signl which nother computer cn understnd.

Hubs, bridges nd switches

Hubs, bridges nd switches llow multiple devices to connect to the router nd they trnsfer dt to ll devices on  network. A router is  more complex device tht usully includes the cpbility of hubs, bridges nd switches. Hubs

A hub brodcsts dt to ll devices on  network. This cn use  lot of bndwidth s it results in unnecessry dt being sent - not ll computers might need to receive the dt. A hub would be useful to link up  few gmes consoles for  locl multiplyer gme using  wired LAN. Bridges

A bridge is used to connect two seprte LAN networks. A computer cn ct s  bridge through the operting system . A bridge looks for the receiving device before it sends the messge. This mens tht it will not send  messge if the receiving computer is not there. It will check to see if the receiver hs lredy hd the messge. This cn help sve unnecessry dt trnsfers, which improves the performnce of  network.

Switches

A switch performs  similr role to  hub nd  bridge but is more powerful. It stores the MAC ddresses of devices on  network nd filters dt pckets to see which devices hve sked for them. This mkes  switch more efficient when demnd is high. If, for exmple,  gme involved lots of dt being pssed between mchines, then  switch could reduce the mount of ltency .

Wireless ccess points Wireless ccess points (WAPs) re required to connect to  network wirelessly. WAPs re usully built into the brodbnd router.

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