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ComputerNetworking


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Year of Investment for Rural Development and

Food Security

Student: Jonathan Danilo Moscol W.

Teaching: Achante Andazabalsection: 10309RC

Topic: ComputerNetworking

career Tech: Communications networks

Course :English

Lima 2013


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Networking

Computer network A collection of computing

devices that are connected in various ways in

order to communicate and share resources

Usually, the connections between computers

in a network are made using physical wires or

cables

However, some connections are wireless, using

radio waves or infrared signals

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Networking

Computer networks have opened up an entire

frontier in the world of computing called the

client/server model

Client/Server interaction


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Types of Networks

LAN

WAN

MAN

CAN

PAN


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Local Area Network (LAN)

Local-area network (LAN) A network that

connects a relatively small number of

machines in a relatively close geographical

area.

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Local Area Network (LAN)

Contains printers, servers and computers

Systems are close to each other

Contained in one office or building Organizations often have several LANS


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Wide Area Networks (WAN)

Wide-area network (WAN) A network that

connects two or more local-area networks over a

potentially large geographic distance

Often one particular node on a LAN is set up to serve as agatewayto handle all communication going between that

LAN and other networks

Communication between networks is called

internetworkingThe Internet, as we know it today, is essentially the

ultimate wide-area network, spanning the entire globe


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Wide Area Networks (WAN)

Two or more LANs connected

Over a large geographic area

Typically use public or leased lines Phone lines

Satellite

The Internet is a WAN


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Metropolitan-area network (MAN)

Metropolitan-area network (MAN) Thecommunication infrastructures that have been

developed in and around large cities

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Metropolitan Area Network (MAN)

Large network that connects different

organizations

Shares regional resources

A network provider sells time


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Campus Area Networks (CAN)

A LAN in one large geographic area

Resources related to the same organization

Each department shares the LAN


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Personal Area Network (PAN)

Very small scale network Range is less than 2 meters

Cell phones, PDAs, MP3 players


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Twisted-pair cabling

Most common LAN cable

Called Cat5 or 100BaseT

Four pairs of copper cable twisted

May be shielded from interference

Speeds range from

1 Mbps to 1,000 Mbps


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Coaxial cable

Similar to cable TV wire

One wire runs through cable

Shielded from interference

Speeds up to 10 Mbps

Nearly obsolete


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Fiber-optic cable

Data is transmitted with light pulses

Glass strand instead of cable

Immune to interference

Very secure

Hard to work with

Speeds up to100 Gbps


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Wireless Media

Data transmitted through the air

LANs use radio waves

WANs use microwave signals

Easy to setup

Difficult to secure


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thank you very much

for your attention

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