7/30/2019 T2.4 [Computer Component- Communication Devices]

1/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

A Member Of

COM1012

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

1

7/30/2019 T2.4 [Computer Component- Communication Devices]

2/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Learning Outcome

2

Describe the uses of

computercommunications.

Describe commonly used

communications devices,

communication softwareand communication

channel

Describes network

architecture andnetwork topology

Differentiate betweenintranet and extranet

Differentiate betweenintranet and extranet

Describes network,

network advantages anddifferentiate among

types of networks: LANs,MANs, and WANs

7/30/2019 T2.4 [Computer Component- Communication Devices]

3/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Computer communications describes a process in

which two or more computers or devices transfer

data, instructions, and information.

3

Sending device Communicationschannel

Receiving device

7/30/2019 T2.4 [Computer Component- Communication Devices]

4/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications

4

7/30/2019 T2.4 [Computer Component- Communication Devices]

5/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Devices A communications device is any type of hardware

capable of transmitting data, instructions, and

information between a sending device and areceiving device.

A dial-up modem converts signals between analog

and digital. A digital modem sends and receives data and

information to and from a digital line.

5

7/30/2019 T2.4 [Computer Component- Communication Devices]

6/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Devices

A wireless modemuses the cell phone network toconnect to the Internet wirelessly from a

notebook computer, a smart phone, or other

mobile device. 6

7/30/2019 T2.4 [Computer Component- Communication Devices]

7/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Devices

A network cardenables a computer or device to access anetwork

Available in a variety of styles

Wireless network cards often have an antenna 7

Network card for desktop, for wired

network communications

ExpressCard module for wireless

network communications

7/30/2019 T2.4 [Computer Component- Communication Devices]

8/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Devices A wireless access point is acentral communicationsdevice that allows computersand devices to transfer data

wirelessly among themselvesor to a wired network

A router connects multiplecomputers or other routerstogether and transmits data

to its correct destination on anetwork

Many are protected by ahardware firewall

8

7/30/2019 T2.4 [Computer Component- Communication Devices]

9/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Software Communications softwareconsists of programs

that:

9

Help users establisha connection to

another computer

or network

Manage thetransmission of

data, instructions,

and information

Provide an

interface for users

to communicate

with one another

7/30/2019 T2.4 [Computer Component- Communication Devices]

10/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Communications Channel

The amount of datathat can travel over a

communications

channel sometimes is

called the bandwidth

Transmission mediacarries one or more

signals

Broadband mediatransmit multiple

signals

simultaneously

10

7/30/2019 T2.4 [Computer Component- Communication Devices]

11/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Physical Transmission Media

Twisted-pair cable Coaxial cable

Fiber optic cable

11

7/30/2019 T2.4 [Computer Component- Communication Devices]

12/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Physical Transmission Media

12

Twisted-pair cable

7/30/2019 T2.4 [Computer Component- Communication Devices]

13/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Physical Transmission Media

13

Coaxial cable

7/30/2019 T2.4 [Computer Component- Communication Devices]

14/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Physical Transmission Media

14

7/30/2019 T2.4 [Computer Component- Communication Devices]

15/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Wireless Transmission Media

15

Infrared Broadcast radio Cellular radio

Microwaves CommunicationsSatellite

7/30/2019 T2.4 [Computer Component- Communication Devices]

16/33

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

17/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Uses of Computer Communications

Users can send and receive wireless messages

using wireless messaging services17

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

18/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Uses of Computer Communications

Text messaging

allows users tosend and

receive shorttext messageson a phone orother mobile

device orcomputer

Picturemessaging

allows users tosend pictures

and sound files

Videomessaging

allows users tosend shortvideo clips

Wireless instant

messagingallows wireless

users toexchange real-time messages

with one or

more otherusers

18

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

19/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Uses of Computer Communications

Wireless Internet access points allow people to connect

wirelessly to the Internet from home, work, school, and in

many public locations.

19

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

20/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Uses of Computer Communications

A global positioning system (GPS) is a navigation system

that consists of one or more earth-based receivers that

accept and analyze signals sent by satellites in order to

determine the GPS receivers geographic location

GPS receivers are:

20

Built intomany mobile

devices

Available as ahandheld

device

Available withnew vehicles

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

21/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Uses of Computer Communications

21

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

22/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks A network is a collection of computers and

devices connected together via communications

devices and transmission media

Advantages of a network include:

22

Facilitating

communications

Sharing

hardware

Sharing data and

informationSharing software

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

23/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks

A local area network(LAN)

is a network that connects

computers and devices in alimited geographical area

A wireless LAN (WLAN) is a

LAN that uses no physical

wires

23

Types of networks

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

24/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks

24

A metropolitan area

network (MAN)

connects LANs in ametropolitan area

A wide area network

(WAN) is a network that

covers a large

geographical area

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

25/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks

The design of computers, devices, and media on a

network is sometimes called the network architecture

25

Peer-to-peer networkClient/server network

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

26/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Client/Server NetworkWhat is a client/server

network?

One or more

computers act as

server and other

computers, or clients,

access server

26

server

client

client

client

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

27/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks

Peer-to-Peer (P2P) describes an Internet network

on which users access each others hard disks and

exchange files directly over the Internet27

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

28/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks A network topologyrefers to the layout of the computers

and devices in a communications network

Popular topologies are star, bus and ring.

28

Star network Bus network Ring network

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

29/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Star Network

All devices connect to a central device, called hub

All data transferred from one computer to another

passes through hub

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

30/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Bus Network

All computers and devices connect to a

single central cable, or bus.

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

31/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Ring Network

Cable forms closed ring, or loop, with all

computers and devices arranged along ring Data travels from device to device around entire

ring, in one direction

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

32/33

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Networks

An intranet is aninternal networkthat uses Internet

technologies

An extranet

allows customersor suppliers to

access part of its

intranet

32

MO1 MO2

7/30/2019 T2.4 [Computer Component- Communication Devices]

33/33

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

Summary

33

Overview of

communications

terminology andapplications

Describes networks,

types of networks,

network architectureand network topology

Differentiate between

intranet and extranet