Communication systems

Question 1

What are the two types of Client Server Models

Answer 1

Thin and Fat client

Question 2

What is the difference between thin and fat clients

Answer 2

Thin client servers rely on a network connection for computing and don’t do much processing on the hardware itself. Whereas Fat clients don’t need a network connection and the users does most of the processing on the applications.

Question 3

What is an advantage of Thin client

Answer 3

Faster than fat clients

Question 4

what is and disadvantage of Thin clients

Answer 4

it doest not work offline

Question 5

What are advantages of Fat client

Answer 5

Processing is done locally

Can work offline

Question 6

What is the disadvanatage of Fat Client

Answer 6

it does not work properly if all the devices do not have the same version.

Question 7

What are forms of Wireless transmissions

Answer 7

Microwaves

Satellite

Radio

Infared

Wifi

Question 8

What are distances can each wireless transmission reach

Answer 8

Microwave: 150km

Satellite: 20,000 km

Infared: 30 m

Wifi: 100 m

Question 9

What is Fat client

Answer 9

Fat clients are devices that connect to serverse for file and basic resources but do most of the processing themselves

Question 10

What is Thin Client

Answer 10

Thin clients are devices which connect to servers which do most of the processing and the client only does data collection and displaying.

Question 11

what is the client-server architecture

Answer 11

it describes the software relationship between the client (user) and the server.

Question 12

what are the two forms of data

Answer 12

analog or digital

Question 13

what is a wireless access point

Answer 13

it is a network decice that allows wireless-capabale devices to connect to a wired network

Question 14

what is a modem

Answer 14

it is a device that allows devices to connect to the internet. It converts digital signals into analog signals that can be transmitted over telephone lines or cable networks.

Question 15

What are network adminstrators

Answer 15

It is a person who manages a network within an organisation.

Question 16

what are the tasks of a network administrator

Answer 16

include network security
installing new applications
distributing software upgrades
monitoring daily activitiy
enforcing licencsing agreements
developing a storage system
providing backup routines.

Question 17

what is a network operating system

Answer 17

it is an operating system that is desinged primarily to support computers connected to a LAN

Question 18

what are the tasks of a Network operating system

Answer 18

administration: adds, removes and organises users; installs hardware devices, software applications, carry out maintenance operations such as backups.

File management: gives users access to the remote hard disks on the server and provide a file system and the ability to manage a network directory

applications—handles requests from users to share data and applications

resource management—allows network devices, such as printers and modems,
to be shared; assigns users to printers; and orders print jobs

security—monitors and restricts access to network resources.

Question 19

What is a logon and a password

Answer 19

Logon is the procedure used to get access to the network. A password is a security measure for logins.

Question 20

what is an intranet

Answer 20

it is a private network that uses a similar interface to the Web. The main purpose of an intranet is to share information and computing resources among the exployees of an organisation. They provide access to the internet through firewalls

Question 21

What Extranent

Answer 21

it is an intranet that is accesible to customers, suppliers or others outside the organisation.

Question 22

What is the difference between Extranet, intranet and the internet

Answer 22

Intranets are private networks that are used by an organisation

Extranets are intranets that are only available to the customers

Internets is a network that connects all computers around the world for everyone to use.

Question 23

What is main similiarity intranet, extranet and internet

Answer 23

they all access the web and have similar interface designs.

Question 24

what is a bcc in a email

Answer 24

short for Blind carbon copy, it where a recipient receives a copy of the email without their name being visible to the other recipients

Question 25

what is a cc in a email

Answer 25

short for carbon copy, is where a recipient recieves a copy of the email that is apart of the primary recipient.

Question 26

what is the difference between a CC and BCC

Answer 26

A recipient of an email in the CC can be seen by the primary recipients and etc whereas a BCC is invisible from the other recipients.

Question 27

what are the two methods of Checksum

Answer 27

Method 1: is to count the number of bits in the message and append that number to the end of a message.

Method 2: it is to count the numebr of “ 1’s “ in the message and append this number to the end of the message

Question 28

What is cycle redudancy check

Answer 28

it is an error detection method technique that checks the data if it was one long number. It does this through a handshake process between both devices to agree upon a divisor. the data is divided by this number and the remainder is sent along with the data

Question 29

what is analog data

Answer 29

is it data that is represented by using contionus variable of physical quantities such as voltages. On encoding and decoding graphs they are represented as waves.

Question 30

What is digital data

Answer 30

it is data that is represented in the form of digits or numbers. On encoding and decoding graphs they are represented as either one or zero’s.

Question 31

what are the four encoding and decoding possibilities in transmission

Answer 31

Analog data to analog signal

Digital data to analog signal

Digital data to digital signal

Analog data to digital signal

Question 32

What is the POP protocol

Answer 32

also known as the Post Office Protocol. It is a protocol that specifies how email messages may be exchanged between a computer and the ISP

Question 33

what is ISP

Answer 33

internet service provider