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8/13/2019 final network fdsklajf dsafjlk dsafjsdajf sajksdjaf jsldajdjfj jfjfjfjfj fjfjfjfjf jslafjlk sdjalfkj dsafjlkjlsad j lasjlkjlj ljsd fa

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What is network?

A network is the interconnection of computers for the sharing of information and resources.

Network Topology

Refers to the arrangement or physical layout of computers, cables, and other components on

the network.

Standard Topologies

Bus: A bus topology consists of devices connected to a common, shared cable.

Star: Connecting computers to cable segments that branch out from a single point, or hub, is referred to

as setting up a star topology.

Ring: Connecting computers to a cable that forms a loop is referred to as setting up a ring topology.

Mesh: A mesh topology connects all computers in a network to each other with separate cables

Classification of Devices

1. Enduser devicessuch as computers, printers, scanners, and other devices that provideservices directly to the users.

2. Network device

includes all devices that connect the end-user devices together to allow them tocommunicate.

3 A NIC is a printed circuit board that fits into the expansion slot of a bus on a computermotherboard. NIC are sometimes called Network Adapter

Network Devices

Modem Router Workstation Hub RJ-45 RJ-45 Boot UTP Outlet Patch Panel UTP Cable

Types of Network

LAN - Local Area Network

LANconnects network devices over a relatively short distance.

WLAN - Wireless Local Area Network

Wireless LANs, or WLANs, use radio frequency (RF) technology to

transmit and receive data over the air. This minimizes the need for wired

connections.WAN - Wide Area Network

As the term implies, a WANspans a large physical distanceMAN - Metropolitan Area Network

a network spanning a physical area larger than a LAN but smaller than a

WAN, such as a city.

GANGlobal Area Network


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LOCAL AREA NETWORK

LAN are designed to:

Operate in limited geographical area Controls network privately under local administrator Provide full time connectivity to local services

LAN consists of the following components:

Workstation Network Interfaces Cards Modem Router Switch Hub Networking Media

Networking Media

Coaxial Cable Shielded Twisted Pair Unshielded Twisted Pair Wireless

Communication Wiring Color Codes Cat 5 Network

1. 568 A 2. 568 B


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586 B

Pin Color Pair Descrtipion

1 white/orange 2 TxData +

2 orange 2 TxData -

3 white/green 3 RecvData +

4 blue 1 Unused

5 white/blue 1 Unused

6 green 3 RecvData -

7 white/brown 4 Unused

8 brown 4 Unused

568A

Pin Color Pair Description

1 white/green 3 RecvData +

2 green 3 RecvData -

3 white/orange 2 TxData +

4 blue 1 Unused


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5 white/blue 1 Unused

6 orange 2 TxData -

7 white/brown 4 Unused

8 brown 4 Unused

Twisted Pair Cable can be configured to straightthrough, and crossover

A. Straight-through cable is used to connect similar devices such as a switch and a PCHubPc

HubHubRouter - Pc

B. Crossover Cable is used to connect unlike devices such as two switchesHubHubPcPc

Terms and Definition

Routeris a computer or host that is dedicated and assigned to handle the route of data. It serves as a

traffic aide for different networks. They help direct data to its destination.

HubAs the central device in a star network. They are probably the most common piece of network

hardware after network interfaces card. It is possible to extend a network using multiple hubs.

ISPinternet Service Provider

Gatewayrefers to a special purpose device that perform an application layer conversion of

information from one protocol stack to another.

LANLocal Area Network

ModemModulator/Demodulator device use to access internet via telephone lines by converting

analog signal to digital data and back if sending data to the internet.

NICNetwork Interface Card

Pingis a basic program that verifies a particular IP addresses exist and can accept requests.


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RJStandard connection originally used to connect telephone lines. And other types of network

connections. RJ11, RJ12, and RJ45 are popular types of RJ connectors.

TCP/IP - Transmission Control Protocol/Internet Protocol. It is a set of protocol or rules that have been

developed to allow computers to share resources across a network

WSWorkstation. Refers to a personal computer

IP Addressa 32 bit address assigned to hosts that use TCP/IP.

Documents

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