BASIC CONCEPT OF NETWORK
DEFINITION OF NETWORK:-
A network is a collection of computers and mobile devices connected together via communications devices and transmission media, often wirelessly allowing computers to share resources(hardware, software, data and information).
COMMUNICATION DEVICE
Hardware component that enables a computer to send (transmit) and receive data, instructions and information to and from one or more computers.
A network is a collection of computers and mobile devices connected together via communications devices and transmission media, often wirelessly allowing computers to share resources(hardware, software, data and information).
COMMUNICATION DEVICE
Hardware component that enables a computer to send (transmit) and receive data, instructions and information to and from one or more computers.
EXAMPLES OF COMMUNICATION DEVICES
Hub
Switch
Modem
Wireless Access Point
Router
Network Interface Card
Wireless Network Interface Card
TRANSMISSION MEDIA
The materials or substances capable of carrying one or more signals.
The materials or substances capable of carrying one or more signals.
TYPES OF TRANSMISSION MEDIA
- PHYSICAL TRANSMISSION MEDIA
Twisted-pair Cable
Coaxial Cable
Fiber Optic
- WIRELESS TRANSMISSION MEDIA
Infrared
Microwaves
Cellular radio
Broadcast radio
Communication satellite
Bluetooth
| ADVANTAGES OF NETWORK |
DISADVANTAGES OF NETWORK |
| Hardware Sharing-Network facilitate the sharing of hardware devices such as printer, plotters and modem |
Undesirable sharing-viruses are easily over network and the Internet |
| Data and
information sharing-enables many people to access and share the same
data such as database and group software development |
Security issues-a computer hacker can get unauthorized access by using different tools |
| Facilitate communication-People communicate efficiently and easily via e-mail, IM, VoIP |
Network Hardware, Software and Setup Costs-Setting up a network requires an investment in hardware, software of network |
| Internet access sharing-small computer networks allows multiple users to share a single Internet connection |
Illegal or
undesirable behaviour-typical problem include the abuse of company
resources, distractions that reduce productivity, the downloading of
illegal or illicit material and even software piracy |
| Expense/cost-the
initial set up costs of a computer network can be high depending on the
number of computers to be connected and the number of connecting devices |
