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Selasa, Februari 02, 2010

Topology (Chapter 3)

3 Common types of topology

i. Bus Topology
































ii. Star Topology




































iii. Ring Topology








































Differentiate between the three types of network topology
1. Description / pernyataan
Bus -      found in lansometimes have more than one server and sometimes  do not need server
                ada dalam lan.kadangkala ada lebih server dan kadang kala tiada langsung
Ring -    found in lan. Server may exist but not connect to all nodes in the network
                ada dalam lan. Server boleh ada tetapi tidak semua berhubung dengannya dalam rangkaian
Star -     found in lan. Must have a host that can be server, hub or router
                ada dalam lanmesti ada host yang boleh jadi menggunakan server,       hub atau router
2. Dependence / kebergantungan
Bus -      if one nodes fail, its not effect network
                satu pc gagal , tidak mengganggu rangkaian
Ring -    if one node fail, the network will fail to function
                satu pc gagal, mengganggu seluruh rangkaian
Star -     if one fail, network can still function as long the host still working, if the host not working network will fail to function
satu pc gagal, rangkaian masih berjalan, tetapi jika host gagal, maka seluruh rangkaian akan gagal dan terganggu
3. advantages / kelebihan
bus -      easy implementation, failure of nodes doesnyt effect the entire lan, no disruption to the network when connecting or removing device
mudah diurus, kegagalan satu pc tidak mengganggu rangkaian, tiada gangguan jika membuat hubungan atau mengganti peranti
ring -     troubleshooting is easy when one of the nodes fails, repair or removing nodes, the network stll functioning
mudah untuk membetulkan rangkaian, membetul dan mengganti peranti, rangkaian masih berjalan
star -     easy implementation failure of nodes doesnyt effect the entire lan, no disruption to the network when connecting or removing device troubleshooting is easy when the host fails. simply repair or replace the host
mudah diurus, kegagalan satu pc tidak mengganggu rangkaian, membetul dan mengganti host semudah ganti atau betulkan sahaja.
4. disadvantage / kekurangan
bus -      if the backbone(wired) fails , entire network will extended, network speed dicrease when number of pc increase, difficult troubleshooting when one nodes fails
jika kabel rosak, mengganggu rangkaian, kelajuan berkurang jika pc bertambah, sukar buat pembaikan jika satu pc bermasalah
ring -     difficult implementation, failure of one nodes will failure the entire network,                 connecting and removing device difficult, network speed dicrease when number of pc increase
                sukar diurus, kelajuan berkurang jika pc bertambah, sukar buat pembaikan dan gantian,                           kerosakan satu pc mengganggu rangkaian
star -     failure of host will effects the entire network, network speed dicrease when number of pc increase, host must be instaled to control the network
host rosak ganggu rangkaian, kelajuan berkurang jika pc bertambah,   host mesti dipasang dala rangkaian

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