Chapter 6

Question 1

Define Telecommunications

Answer 1

The electronic transmission of signals for communications; enables organizations to carry out their processes and tasks through effective computer networks

Question 2

Explain the general model of telecommunications

Answer 2

-A sending unit (a person, a computer system, a terminal, or another device), sends the message signal to a telecommunications device

-The telecommunications device may convert it into a different form

-The telecommunications device then sends the signal through a medium.

-Another telecommunications device connected to the receiving computer (6) receives the signal

-The process can be reversed, and the receiving unit can send another message to the original sending unit

Question 3

Define a telecommunications medium

Answer 3

Any material substance that carries an electronic signal to support communications between a sending and receiving device

Question 4

Define a telecommunications device

Answer 4

A hardware component that facilitates electronic communication

Question 5

What is an important characteristic of telecommunications?

Answer 5

The speed at which information is transmitted

Question 6

What do advances in technology allow us to do?

Answer 6

allow us to communicate rapidly with clients and co-workers almost anywhere in the world

Question 7

Explain synchronous communication

Answer 7

The receiver gets the message almost instantly when its sent

Question 8

Explain asynchronous communication

Answer 8

There is a measurable delay between the sending and receiving of the message

Question 9

What are the telecommunication media types?

Answer 9

-Guided transmission
-Wireless transmission

Question 10

List the media types under guided transmission

Answer 10

-Twisted-pair wire
-Coaxial cable
-Fiber-optic cable
-Broadband over power lines

Question 11

-List the media types under wireless transmission

Answer 11

-Microwave: Terrestrial and satellite
-3G-5G wireless communication
-Wi-Fi
-Bluetooth
-Infrared

Question 12

Define channel bandwidth

Answer 12

The rate at which data is exchanged over a communication channel

Question 13

Explain broadband communications

Answer 13

A telecommunications system in which a very high rate of data exchange is possible

-Can exchange data very quickly

Question 14

Define Narrowband communications

Answer 14

A telecommunications system that supports a much lower rate of data exchange

Question 15

Evaluate twisted pair wires

Answer 15

Advantages: Widely available

Disadvantages: Transmission speed and distance limitations

Question 16

Evaluate Coaxial cable

Answer 16

Advantages: Cleaner and faster data transmission

Disadvantages: Expensive

Question 17

Define terrestrial microwaves

Answer 17

High frequency signal transmitted by line-of-sight devices so that the line of sight between the transmitter and receiver must be unobstructed

Question 18

Define satellite microwaves

Answer 18

Receive signal from the Earth station, amplifies the weak signal and rebroadcasts it at a different frequency

Question 19

Define 3-5G wireless communication

Answer 19

5G brings higher data transmission rates, lower power consumption, higher connection reliability with fewer dropped calls, increased geographical coverage and lower infrastructure costs

Question 20

Define Wifi

Answer 20

A medium range wireless telecommunications technology

Question 21

Define Bluetooth

Answer 21

A wireless communications specification that describes how electronic devices can be interconnected over distances

Question 22

Define Near field communication

Answer 22

A very short-range wireless connectivity technology designed for consumer electronics

Question 23

Explain infrared transmission

Answer 23

-It sends signals through the air via light waves

-It can be used to connect peripheral devices and establish a wireless network, with the advantage that devices can be moved and installed without expensive wiring and network