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Week 4
Basics networking concept
This is week 4, in this week i have learned about basics networking concept. So, what is Computer Network?
Computer Network is a group of interconnected
computers that two or more computers are connected via hardware or software,
and able to communicate with each other. For example of a computer network: the
Internet, ATM, school network, e-banking, home network, etc. Nowadays, Computer
Network has three basic networking concept, as we know three of them are:
- Topology (the physical layout of the network)
- Protocol (the rules in data communication)
- Architecture (how the hardware and software are integrated to form a working).
As the new knowledge for me, I
would like to describe about the typical ways of networking computers.
Communication
Channel
- Some type of link through which the data can be transmitted or transferred from one computer to another.
- To send data through the channel requires some type of transmission media, which may be either physical or wireless.
Physical media
- Twisted-pair cable – consists of two independently insulated wires twisted around each other (least expensive type of cable—the kind that is used in many telephone systems)
- Coaxial cable – consists of an insulated center wire grounded by a shield of braided wire (the primary type of cabling used by the cable television industry; it is more expensive than twisted pair)
- Fiber-optic cable – contains hundreds of clear fiberglass or plastic fibers (threads) (made from thin, flexible glass tubing; bandwidth is greater, so it can carry more data; it is lighter than metal wires and is less susceptible to interference; it is fragile and expensive)
- ISDN line – a special digital telephone line that transmits and receives information at very high speeds.
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