TeleCommuniCation AnD MulTimeDIa: NeTWork TopOloGy

Ooppsss! 

macam awal plak kan update blog kali ni.. hee

yelaa~ yg lepas ny terlaluuu lambat plak... ad mase on9 ni.. ak update awl2..

antara rizen laen lak... sebab..

dis week ak absent! 

so with the help of my beloved frenz.. dorang laa yg bg input sikit2.. :)

thnx guyz! ded s what are frenz for..

soo. dis week... 

still dalam chapter 4.. tp pasal network topology

a.k.a network structures.... :)

network topology ni indicates how a network is design or lay out

and die ada both physical level and logical level

4 main type of network structure

bus network structure
terdiri daripada continuos length of cable that connects TWO or MORE device together
BUS = backbone network
only ONE computer can transfer info at a time
The INFO moves through the entire length of a cable
each END of the cable must have a
TERMINATOR
device that absorbs the signals transmitted on a network cable
prevents signals from being bounced back along the cable and causing interference...

advantages of using this type of network is

~ simple

~each computer is connected to a single length of cable

~often connected to a small area (office)

disadvantages pn ada jugak which is

~expansion is exisiting can be difficult ! > cable must be broken to extend the cable and attach to the additional computer

~thus, other computer cannot exchange info

~if the computer is MALFUNCTIONING and causing problem on the cable > entire network will be infected !

~expensive ! most use a single piece of copper cable to connect its computers together

star network structure

most common type of network

terdiri daripada computer individu yg bersambung pada central point on the network = HUB

currently connectd to 4, 8 or 16 computers

length between computers cable and hub must be LESS than 100m

advantages die plak..?

~easy as long as there is a FREE port on the HUB

~no need to shut down when adding another computers

~when error occured, other computers not affected !

still ad disadvantage ! which are

~hub fails = information can no longer transfer from one computer to another

~the COST is more implement than other types of network

~LARGE amount of cable is used because computer on the network must be independently connected to the hub

ring network structure

consist of individual computers connected to a single length of cable arranged in a RING

travels in ONE direction only

information in transfer located next to it

if it is not adress to the computer.then info will send to the next computer and so on

there is no beginning and end 

Advantages of Ring Topology 
~   This type of network topology is very organized. Each node gets to send the data when it receives an   empty token. This helps to reduces chances of collision. Also in ring topology all the traffic flows in only one  direction at very high speed.
~   Even when the load on the network increases, its performance is better than that of Bus topology.
~  There is no need for network server to control the connectivity between workstations.
~   Additional components do not affect the performance of network.
~  Each computer has equal access to resources.

Disadvantages of Ring Topology
~  Each packet of data must pass through all the computers between source and destination. This makes it slower than Star topology.
~  If one workstation or port goes down, the entire network gets affected.
~   Network is highly dependent on the wire which connects different components. 
~  MAU’s and network cards are expensive as compared to Ethernet cards and hubs. 
tree network sructure

used a MIXTURE of many different kings of network structure

sooo.. ni laa yang rakan2 ak blaja dis week.. 

walaupun xdtg kelas.. nsyalah laa same2 kte study ye..

buku ada.. internet ada,.. xd  alasan kita xmaw belajar.. :)

lots of love,

sugaramour