Thursday, March 15, 2012

Week 3

few of my friends actually told me that my blog looks really simple. to me, the content of the blog should be precise and packed but in a brief way explained. I have another blog before, and believe me people hate to read long posts. so I choose to make my content simple yet precise.

this week's chapter: Computer Networking and Network Topology

we actually learn a bit about computer networking in the previous class, so i was just going to recall what we have learn.

Computer Network: connecting computer to computer / devices
It also enable communication between:
a) Computer devices/equipment
b) Transmission media to send/control data/signals
c) Communication devices to transmit/send data from sources to destinations
d) Softwares

Many types of network exist, but the most common types are:
a) Local Area Network (LAN)
b) Wide Area Network (WAN)
c) Metropolitan Area Network (MAN)
d) Personal Area Network (PAN)

the next chapter that we learn is the topology. topology is one way that the networks are being categorized. It specifies the geometric arrangement of the network. It has both logical and physical level in its structure.

Physical level:
- the way that devices on a network are arranged

Logical level
- the way the signals act on the network media/ the way that the data passes through

we will go through one by one of this topology. first is the BUS NETWORK STRUCTURE.

- a continuous length of cable that connects two or more devices together.
- it can only transfer information one at a time.
- each end of the cable on the bus network must have  a terminator ( a device that absorbs signal transmitted on a network cable)

-consists of individual computer connected to a centre point of the network.
-each computer is connected to a central network connector, called a hub.
-It is commonly used as if there are error in one of the computers or cable, the rest of the network will be unaffected.

-consists of individual computers connected to a single length of cable arranged in a ring.
-information travels in one direction only
-must be attached to a single ring cable

-a mixture of many different kinds of network structure. It can incorporate structures such as ring, star, and bus network in one large network.

that's all for now. It's a long entry. Well, we do learn a lot right? see you in my next entry! XD

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