4. The computer in a network can communicate with each other as well as
work independently . Each computer in a network is called a Node.
The computer in a network may be linked through Cable, Telephone
5. ADVANTAGE OF NETWORKING
• Efficient Use of Storage Media
• Preserving Information
• Reduction in Hardware Costs
• Efficiency
• Redundancy
• Quickest Document Delivery
9. HUB :
• A hub is the central meeting point where cables join to carry information to other
resources through a network.
• It contains several wiring ports that can be used to receive data and pass on the same
to any other device on a network.
• Hubs have a simple design and they rarely wear
out.
• They provide the additional connections necessary
but end up using much of the network capacity.
Active (it can amplify the Signal)
Passive (it can’t)
10. Switches:
• Switches, like hubs, provide a centralized connection.
• They include network monitoring and selective configuration
capabilities, thereby reducing network traffic.
• Shared data can directly be sent to an individual resource instead of
every networked resource.
• Switches are more economical to use.
11.
12. Routers:
A router is used to send specific portions of messages directly to
the intended destination in a separate network.
Information is directly transmitted between the networks without
causing any network traffic.
21. • Network security consists of the policies and
practices adopted to prevent and monitor
unauthorized access, misuse, modification, or
denial of a computer network and network-
accessible resources.
22.
23. Based upon your user name , you are given rights ,like
Read –Only access or Read – Write Access or No Access at
all.
A combination of be rights can also be granted to
the same user for different sets of data.