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Network ConceptsNetwork ConceptsDevicesDevices

Introduction into Network Introduction into Network DevicesDevices

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AimsAimsGain a knowledge about network devices.Gain a knowledge about network devices.

Discuss what network devices are Discuss what network devices are required to create a basic networkrequired to create a basic network

Draw a bespoke network drawing using Draw a bespoke network drawing using VisioVisio

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Network DevicesNetwork Devices

In order to setup a network a variety of devices In order to setup a network a variety of devices are required.are required.

The network devices differ according to what The network devices differ according to what network you intend to setup.network you intend to setup.

A network segment is a portion of a computer A network segment is a portion of a computer network where every device communicates network where every device communicates using the same physical layer.using the same physical layer.

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Basic NetworkBasic Network

A simple network can be created between two A simple network can be created between two computers (peer to peer).computers (peer to peer).– In order to create this connection each computer must In order to create this connection each computer must

have an NIC network interface card.have an NIC network interface card.

– A Network card, Network Adapter, LAN Adapter or A Network card, Network Adapter, LAN Adapter or NIC (network interface card) is a piece of computer NIC (network interface card) is a piece of computer hardware designed to allow computers to hardware designed to allow computers to communicate over a computer network.communicate over a computer network.

Basic NetworkBasic Network

Basic NetworkBasic Network

An NIC provides physical access to a networking medium and provides a low-level addressing system through the use of MAC (Media Access Control) addresses.

It allows users to connect to each other either by using cables or wirelessly.

Basic NetworkBasic Network

You would also need to modify the You would also need to modify the Ethernet cable by adapting the pins: 1--3, Ethernet cable by adapting the pins: 1--3, 2--6, 3--1, 6--2, pins 4,5,7 and 8 are 2--6, 3--1, 6--2, pins 4,5,7 and 8 are unused. (or purchase a Crossover cable)unused. (or purchase a Crossover cable)

Task

Create a crossover cable

Discuss and make notes on the purpose of the crossover cable.

Find out more about MAC Addresses

Using the internet find out what a Modem is used for.

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Other NetworksOther Networks

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Other Network DevicesOther Network Devices

There are a variety of different network devices that are available, each of which has a specific role within the network.Some of which are listed below:– Switch– Hub– Router– Bridge– Gateway– Repeaters

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Other Network DevicesOther Network Devices

SwitchesSwitches– A networkA network switch is a device that connects network switch is a device that connects network

segments.segments.

– A switch is intelligent, it can recognise what cable has A switch is intelligent, it can recognise what cable has been inserted into it and adapt to allow the network to been inserted into it and adapt to allow the network to communicate.communicate.

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Other Network DevicesOther Network Devices

HubsHubs– A A network hubnetwork hub is a device for connecting is a device for connecting

multiple devices together, making them act as multiple devices together, making them act as a single network segment.a single network segment.

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Other Network DevicesOther Network Devices

What is the difference between a Hub and What is the difference between a Hub and a Switch?a Switch?– A hub receives a packet at one of its ports from A hub receives a packet at one of its ports from

a PC on the network, it transmits the packet to a PC on the network, it transmits the packet to all of its ports (broadcast) thus, to all of the all of its ports (broadcast) thus, to all of the other PCs on the network.other PCs on the network.

– A hub does not use any intelligence to A hub does not use any intelligence to determine the destination of a packet, whereas determine the destination of a packet, whereas a switch does.a switch does.

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TasksTasks

What problems could occur as a result of using What problems could occur as a result of using a hub?a hub?

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Other Network DevicesOther Network Devices

RouterRouter– This is a device that forwards and routes data This is a device that forwards and routes data

packets along networks.packets along networks.

– A router is often included as part of a network switch.

– A router is located where one network meets another.

– It prevents the traffic on one from unnecessarily spilling over to the other. This process is known as routing.

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Other Network DevicesOther Network Devices

Bridge– A bridge is a device that connects two networks

so that they act as if they’re one network.

– A key feature of a bridge is to enable a large network to be partition into two smaller, more efficient networks.

– Bridges work best in networks that are highly segregated.

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Other Network DevicesOther Network Devices

Gateway– The main job of a gateway is to convert protocols

among communications networks.

– A gateway can accept a packet formatted for one protocol (e.g. AppleTalk) and convert it to a packet formatted for another protocol (e.g. TCP/IP) before forwarding it.

– A gateway can be implemented in hardware, software or both, but they are usually implemented by software installed within a router.

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TasksTasks

Using the internet look into the various Using the internet look into the various other available network devices/terms, other available network devices/terms, including multiplexers, ADSL, Analogue including multiplexers, ADSL, Analogue and digital frequencies.and digital frequencies.

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ConclusionConclusion

Gained knowledge about network devicesGained knowledge about network devices

Discuss what network devices are Discuss what network devices are required to setup a networkrequired to setup a network

Create a bespoke network diagram in Create a bespoke network diagram in VisioVisio