week 4

I’m learn about basic networking concepts.

 A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information.

The advantages using a computer network:

1. Resource sharing  hardware and software
2. Information sharing   - easy accessibility from anywhere   - search capability (WWW)

3. Promote communication and collaboration.   - Email, and   - Message broadcast

In this weeks, I also learn about basic networking concepts
such as:
1. Topology ( the physical layout of the network)

2. Protocol (The rules in data communication)

3. Architecture (how the hardware and software are integrated to form a working)

 And about data transmission characteristic

* Bandwidth (rate of transmission)
Bandwidth refers to how much data you can send through a network or modem connection. It is usually measured in bits per second, or "bps."

* Analog or digital (type of signal)

Analog is describes a device or system that represents changing values as continuously variable physical quantities.
Digital system is a data technology that uses discrete (discontinuous) values.

* the last is serial or parallel (order of bits)
- serial transmission is bits are transmitted one bit at a time over a medium
- parallel transmission is several bits are transmitted together in one go over a medium.


session 2 & 3

In this sessions we have learn about networking communication and types of network.

In session 2, I have learn about communication channel.
Communication channel is a medium through which a message is transmitted to its intended audience, such as print media or broadcast (electronic) media.

And also I learn about example of physical medium  

The first, shielded Twisted Pair (STP)

Coaxial Cable

Optical Fiber Cable

In session 3, I have learnt about the types of networking.
The types of networking are LAN, WAN and MAN.
1. LAN (local area network)       it is limited geographical area e.g. office network and school network.

2. WAN (wide area network)       WAN covers a large geographical area, and consists 2 or more LAN.       WAN use a combination of satellites, fiber optics and microwave such as internet.

3. MAN (metropolitan area network)

      This is high speed network that connects LAN in area (city or town) and includes one or more LAN such as cell phone system.

In this session, I also learnt about network structured.    The first is client/server.
Server is computer that control access to hardware, software and other resources on network,
example mail server, database server and file server.

    The second is peer-to-peer.

Peer-to-peer is simple network that can connect with fewer than ten computers. Peer-to-peer has equal capabilities to use resources, there is no central server and all computer communicates directly with one to another.