Comm Systems

Question 1

Define Full Duplex

Answer 1

Communications in both directions at the same time

Question 2

What is a SMTP Server

Answer 2

Used to send email messages to client application. Simple Mail Transfer Protocol

Question 3

What is a MAC address

Answer 3

A unique address hardwired into network devices

Question 4

Define Stop Bit

Answer 4

A bit at the end of a character the signals the end of transmission of a character to the receiving computer

Question 5

Define Asynchronous

Answer 5

a form of start/stop data transmission

Question 6

What is a repeater

Answer 6

Any network hardware device that receives a signal, amplifies it then transmits the amplified signal across the network.

Question 7

What is Encryption

Answer 7

a process applied to data to as a security measure to prevent unauthorised access.

Question 8

Define Bandwidth

Answer 8

The maximum data transfer rate of a network or internet connection, measured in Mb/s

Question 9

What is Ring Topology

Answer 9

Communications in a continuous circle with nodes represented as points on the circumference.

Question 10

What is a POP Server

Answer 10

Used to receive email messages from client applications. Post Office Protocol

Question 11

define bps

Answer 11

bps- measured in bits/sec used for data speed

Question 12

define baud rate

Answer 12

The baud rate is the rate at which information is transferred in a communication channel.

Question 13

define parity checking method

Answer 13

parity checking counts the number of binary values

Question 14

define checksum method

Answer 14

checksum is all bytes added together on the receiving end as well as the transmit end, the total is transmitted as binary. An error will occur if totals don’t match

Question 15

define Cyclic Redundancy Check

Answer 15

CRCs are able to detect more errors than checksums and most of the common types of transmission errors

Question 16

Define teleconferencing

Answer 16

the use of telecommunication devices to hold discussions between participants in different locations.

Question 17

define telephone system

Answer 17

a communication system that transmits sound between distant points

Question 18

define email

Answer 18

messages distributed by electronic means from one computer user to one or more recipients via a network.

Question 19

define e-commerce

Answer 19

commercial transactions conducted electronically on the Internet.

Question 20

define scalability

Answer 20

the capacity to be changed in size or scale.

Question 21

Explain star topology

Answer 21

all nodes of a network are connected to a single, central hub

Question 22

Define peer to peer

Answer 22

denoting or relating to networks in which each computer can act as a server for the others

Question 23

define CSMA/CD

Answer 23

arrier sense multiple access/collision detection, CSMA/CD is a media access control MAC protocol

Question 24

HTTP?

Answer 24

hyper text transfer protocol

Question 25

FTP?

Answer 25

File transfer protocol

Question 26

HTTPS?

Answer 26

hyper text transfer protocol SECURE

Question 27

LAN vs WAN

Answer 27

Local Area Network - wide Area network

Question 28

IP?

Answer 28

Internet Protocol

Question 29

OSI Model

Answer 29

open systems interconnection model is the industry standard framework that defines the stages data must go through when being transmitted over or between networks

Question 30

TCP

Answer 30

Transmission Control Protocol

Question 31

simplex mode

Answer 31

the communication is unidirectional

Question 32

router

Answer 32

a device which forwards data packets to the appropriate parts of a computer network.

Question 33

serial transmission

Answer 33

Transmitting data one bit at a time

Question 34

parallel transmission

Answer 34

Transmitting several bits of data simultaneously

Question 35

handshaking

Answer 35

The process by which two devices initiate communications