Science computer

                    ''life before the computer''

                     3.1.3 Network Topology

     so WHAT IS THE DEFINITION...?     

• A network topology refers to 

1.    The layout of the computers and devices in a communications network or
2.     The configuration of a network that consists of cables, computers, and other peripherals  

    Physical topology                                              

• The configuration of cables, computers, and other peripherals. OR 
• The arrangement of a cabling on a network.

  

  Logical Topology

• the path that data travels between computers on a network. OR 
• How signal travels along the physical path.

TYPES OF NETWORK TOPOLOGY

                                                                  Bus topology

     

•  Bus networks consists of a single central cable (backbone/ trunk), to which all computers and other devices connect (node). 

            

Features of Bus Topology  

1. It transmits data only in one direction.
2. Every device is connected to a single cable

           

Disadvantages of Bus Topology

1. Cables fails then whole network fails.
2. If network traffic is heavy or nodes are more the performance of the network decreases.
3. Cable has a limited length.
4. It is slower than the ring topology.

                                           

          

• It is called ring topology because it forms a ring as each computer is connected to another computer, with the last one connected to the first.  

                  

                          

Advantages of Ring Topology

1. Transmitting network is not affected by high traffic or by adding more nodes, as only the nodes having tokens can transmit data.
2. Cheap to install and expand

Disadvantages of Ring Topology

1. Troubleshooting is difficult in ring topology.
2. Adding or deleting the computers disturbs the network activity.
3. Failure of one computer disturbs the whole network.

                                                star topology

         In star topology, each computer is connected to a central (hub/switch) using a point-to-point connection. The central hub can be a computer server that manages the network,

                 

Advantages of Star Topology

1. Fast performance with few nodes and low network traffic.
2. Hub can be upgraded easily.
3. Easy to troubleshoot.
4. Easy to setup and modify.
5. Only that node is affected which has failed, rest of the nodes can work smoothly.

Disadvantages of Star Topology

1. Cost of installation is high.
2. Expensive to use.
3. If the hub fails then the whole network is stopped because all the nodes depend on the hub.
4. Performance is based on the hub that is it depends on its capacity

        

    

Memory ku

hmm walaupon aq menulis blog dan xde sape nk bace, aq tak kesah..hahahaha..ayat kesian gila nak mam... hehe.sejak menjak ni ececeh.. aq asyik buang masa je, ntahla, aq sendiri x tau ape nk dibuat cuti niii..
      
aq ni selalu spend time dengan LAPTOP,LAPTOP,LAPTOP..  haih,, burung hantu betul.tetiba teringat sekolah aq dulu, sekolah hira', auchhh rindu bohhhh!!! sekolah tu banyak mengajar aq bagaimana nak jadi manusia yang sebenar benarnya.. walaupon 3 tahun je aq sekolah kt situ tp banyak seh kenangan, suka duka, onak duri yg aq tempuhi..(ok itu tersangatlah tipu).And ukhuwah time aq kt sana sangat syiokkkkk.. sebenarnya kt mana2 pn kita boleh jalin ukhuwah, antara kita nk atau x nak, tapi kene ingat! ukhuwah biar sesama jantina jeeeeee

Time form 1 hahahaha.. takyah katela, aq mmg tersangatlah innocent.. hati pon bebas  je, sesuka hati ko je nk buat ape haha, Ingat lagi time tu, haha tengah sume org (classmatte) malu antara satu sama lain (sebab sekolah tu sek agama) nk amik meja,aq yg xde rasa malu and takut selambe dek pi amik meja kt tmpat lelaki haha, Nak wat gano, eden time tu budak baru masuk, so x tahu sgtlah yg diorang cukup menjaga bab2 pergaulan, yola.. eden ni sek rendah dulu sek kebangsaan, mnede cikgu suruh menjaga antara laki pompuan.dok membuli adelah hihihi;.

Haaa.. atas tu gambar masa den Form 2.. hmm.. miss them a lot!!.. hmm Thanks Allah