Introduction To Computer Networking

Introduction to computer
networking
By
Gurudarshan K
Definition
s
1.1 Network Definition
• A network can be defined as two or more
computers connected together in such a way
that they can share resources.
• The purpose of a network is to share

resources.
Definitions
(cont..)
A resource may be:
• A file
• A folder
• A printer
• A disk drive
• Or just about anything else that exists on a
computer.
Definitions
(cont..)
A network is simply a collection of computers or other
hardware devices that are connected together, either
physically or logically, using special hardware and
software, to allow them to exchange information and
cooperate. Networking is the term that describes the
processes involved in designing, implementing, upgrading,
managing and otherwise working with networks and
network technologies.
Advantages of
networking
• Connectivity and Communication
• Data Sharing
• Hardware Sharing
• Internet Access
• Internet Access Sharing
• Data Security and Management
• Performance Enhancement and Balancing
• Entertainment
The Disadvantages (Costs) of Networking
• Network Hardware, Software and Setup Costs

• Hardware and Software Management and
Administration Costs
• Undesirable Sharing
• Illegal or Undesirable Behavior
• Data Security Concerns
Fundamental Network
Classifications
Local Area Networks (LANs):
• A local area network (LAN) is a computer network covering a small geographic area, like a home, office,
or group of buildings
Wide Area Networks (WANs):

• Wide Area Network (WAN) is a computer network that covers a broad area (i.e., any network whose
communications links cross metropolitan, regional, or national boundaries). Or, less formally, a network
that uses routers and public communications links
• The largest and most well-known example of a WAN is the Internet.
• WANs are used to connect LANs and other types of networks together, so that users and computers in
one location can communicate with users and computers in other locations
Metropolitan Area Network (MAN):

o A metropolitan area network (MAN) is a network that interconnects users with computer resources in a
geographic area or region larger than that covered by even a large local area network (LAN) but smaller
than the area covered by a wide area network (WAN). The term is applied to the interconnection of
networks in a city into a single larger network (which may then also offer efficient connection to a wide
area network). It is also used to mean the interconnection of several local area networks by bridging
them with backbone lines. The latter usage is also sometimes referred to as a campus network.
Fundamental Network Classifications
(cont)
The Local Network (LAN)
Client Client
Client Client
Client Client
(cont)
• Wide Area Network
(cont)
Metropolitan Area Network (MAN)
Intranet and Internet Specifications
• Intranet: An intranet is a private network that is contained within an
enterprise. It may consist of many interlinked local area networks and
also use leased lines in the wide area network.
• An intranet uses TCP/IP, HTTP, and other Internet protocols and in
general looks like a private version of the Internet. With tunneling,
companies can send private messages through the public network, using
the public network with special encryption/decryption and other
security safeguards to connect one part of their intranet to another.
• Internet: is a worldwide system of computer networks - a network of
networks in which users at any one computer can, if they have
permission, get information from any other computer (and sometimes
talk directly to users at other computers).
Peer-to peer network
• A peer-to-peer network is a network where the computers
act as both workstations and servers.
• great for small, simple, and inexpensive networks.
• In a strict peer-to-peer networking setup, every computer is
an equal, a peer in the network.
• Each machine can have resources that are shared with any
other machine.
• There is no assigned role for any particular device, and each
of the devices usually runs similar software. Any device can
and will send requests to any other.
Peer-to peer network (cont..)
Thank you

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Introduction To Computer Networking

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Introduction to computer

• The purpose of a network is to share

• Network Hardware, Software and Setup Costs

Wide Area Networks (WANs):

Metropolitan Area Network (MAN):

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