Transcript Network Devices - BtecNationalDiplomaY2

Network Concepts
Devices
Introduction into Network
Devices
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Aims
 Gain
a knowledge about network devices.
 Discuss
what network devices are
required to create a basic network
 Draw
a bespoke network drawing using
Visio
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Network Devices

In order to setup a network a variety of devices
are required.
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The network devices differ according to what
network you intend to setup.
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A network segment is a portion of a computer
network where every device communicates
using the same physical layer.
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Basic Network

A simple network can be created between two
computers (peer to peer).
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In order to create this connection each computer must
have an NIC network interface card.
A Network card, Network Adapter, LAN Adapter or
NIC (network interface card) is a piece of computer
hardware designed to allow computers to
communicate over a computer network.
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Workstations
File Servers
Network Interface Cards
Basic Network
 An
NIC provides physical access to a
networking medium and provides a lowlevel 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.
Modems
Wireless Access Point
Other 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:

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Switch
Hub
Router
Bridge
Gateway
Repeaters
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Other Network Devices
 Switches
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A network switch is a device that connects network
segments.
A switch is intelligent, it can recognise what cable has
been inserted into it and adapt to allow the network to
communicate.
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Switches
Other Network Devices
 Hubs

A network hub is a device for connecting
multiple devices together, making them act as
a single network segment.
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Other Network Devices
 What
is the difference between a Hub and
a Switch?
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A hub receives a packet at one of its ports
from a PC on the network, it transmits the
packet to all of its ports (broadcast) thus, to all
of the other PCs on the network.
A hub does not use any intelligence to
determine the destination of a packet,
whereas a switch does.
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Routers
Other Network Devices
 Router
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This is a device that forwards and routes data
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 Networks
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Other Network Devices
 Bridge
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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 Devices

Gateway
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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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Conclusion
 Gained
knowledge about network devices
 Discuss
what network devices are
required to setup a network
 Create
a bespoke network diagram in
Visio
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