What is a computer network? A computer network is a set of computers,
printers, and other devices that are connected to each other to share
information and move data through cables. Many users can print with the same
printer or use the same software at the same time. Computers that store primary
data and act as data centers are called Servers, while computers that are
connected to networks and retrieve data from Servers are called Workstations.
1. Local Area Network (LAN) A network that is limited by a small area
usually used by a small office in a building or school. Usually not far from 1
km square. Most LANs use cables and LAN cards to connect one computer to
another. Each computer that is connected to a LAN has a different Internet
Protocol Address. Usually abbreviated as IP Address. LAN can also be set up
through Wireless Technology which has speeds of 10 to 10,000 Mbps. Wireless
LANs can use infrared or radio frequencies.
a. Sharing files and printers is easy between computers. b. The risk of
data loss caused by a virus can be reduced. c. If there is one computer
connected to the modem, all computers can access the internet. d. There is a
lot of space in the storage system (hard disk) for storing documents. e. Files
stored on the server can be accessed by client computers with authorization.
Authorizations can be made according to the company’s organizational structure.
2. Metropolitan Area Network (MAN) This type of network usually has a
larger area than a LAN or can contain networks from several LANs that are
connected to each other. Example MAN is a network built on a broad campus
3. Wide Area Network (WAN) WAN is a type of network that …
Broadband refers to a high speed form of telecommunication ion which
several frequencies are used to transmit information. The availability of a
wide band of frequencies makes it possible to send large amounts of data
through the various channels embedded within the band. This helps in saving a
considerable amount of time. A broadband
connection has marked advantages over other forms of net access media like
dial-up. Some of them are:
Gone are the days when you have to sit in front of your system for hours
together to download a single document. Now with broadband technology you can
get scores of data in a matter of minutes and seconds. Broadband speed is tons
of times faster than other types of net connections especially dial-up.
How do you think all the gaming centers prosper these days, downloading
complex, tricky games from the internet would not have been possible without
Previously with the dial-up net connections which were accessible
through the phone lines, there was the disadvantage of keeping the phone
engaged all the while the net was on. But broadband is available through a
separate cable with no connection with your telephone line.
It provides ‘anytime access’ since you can leave it on for hours.
There are attractive packages offering unlimited access for reasonable
Nowadays broadband technology also makes phone services possible through
cheap VoIP technology.
All said and done broadband services are not without apparent faults. A
look into some of the negatives:
Broadband connections can be more expensive than dial up in some cases,
however when separate lines are used the costs can be offset.
Leaving your system with net access on all the time can make it more
susceptible to hackers. You will have to create a personal firewall as
Such connections may …