Question 1

An) ___________ divides one high-speed communication circuit into several lower speed circuits for the primary reason of saving communication line costs.

Accepted Answer

A) transponder 
B) multiplexer 
C) inverse multiplexer 
D) codec 
E) intelligent terminal

Question 2

What is the term used to describe the placing of two or more signals on a single circuit?

Accepted Answer

The answer of What is the term used to describe...

Question 3

If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is?

Accepted Answer

A) 128 Kbps 
B) 64 Kbps 
C) 12800 bps 
D) 96 Kbps 
E) 32000 bps

Question 4

The room that contains the cable termination points and the distribution frames is referred to as

Accepted Answer

A) telecommunications closet 
B) equipment room 
C) building entrance 
D) backbone room 
E) work area

Question 5

With which type of digital signaling does the signal always return to zero volts after each bit?

Accepted Answer

A) Non-return-to-zero signaling 
B) Unipolar signaling 
C) Return-to-zero signaling 
D) Data rate signaling 
E) Huffman encoding signal

Question 6

In a multipoint circuit configuration, each computer can use the circuit at the same time.

Accepted Answer

A) True 
 B)False

Question 7

What is coding? Briefly describe the two most important coding schemes.

Accepted Answer

The answer of What is coding? Briefly describe the two...

Question 8

Describe two common modem standards.

Accepted Answer

The answer of Describe two common modem standards....

Question 9

Which type of digital signaling would experience fewer errors because it has more distinct signals?

Accepted Answer

A) unipolar 
B) serial 
C) bipolar 
D) attenuation 
E) Huffman encoding signal

Question 10

A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent through the connection.

Accepted Answer

A) True 
 B)False

Question 11

__________ is a line-of-sight type of wireless media.

Accepted Answer

A) coaxial cable 
B) microwave 
C) radio 
D) twisted pair 
E) fiber optic

Question 12

The representation of the character A by the group of 8 bits, 01000001, is an example of:

Accepted Answer

A) digital coding 
B) phase modulation 
C) binary modulation 
D) analog transmission 
E) pitch variation

Question 13

_____________ can be thought of as dividing the circuit horizontally.

Accepted Answer

A) Frequency division multiplexing 
B) Statistical frequency division multiplexing 
C) Statistical time division multiplexing 
D) Time division multiplexing 
E) Wavelength division multiplexing

Question 14

Of all the media available, fiber optic provides the highest transmission speeds.

Accepted Answer

A) True 
 B)False

Question 15

Fiber optic cable carries signals in traditional electrical form.

Accepted Answer

A) True 
 B)False

Question 16

Describe two ways in which Statistical Time Division Multiplexing STDM) differs from Time Division Multiplexing TDM).

Accepted Answer

The answer of Describe two ways in which Statistical Time...

Question 17

Which is not true about point-to-point circuits?

Accepted Answer

A) point-to-point circuits are dedicated to the use of the two computers. 
B) point-to-point circuits are more expensive than multipoint circuits. 
C) point-to-point circuits are called dedicated circuits. 
D) point-to-point circuits reduce the amount of cable required and use the circuit more efficiently than multipoint circuits. 
E) point-to-point circuits are used when the computers generate enough traffic to fill the capacity of the communication circuit.

Question 18

Which of the following is not a key advantage of digital transmission?

Accepted Answer

A) It permits only low transmission rates. 
B) It is more efficient. 
C) It is simpler to integrate voice, video, and data on the same circuit. 
D) It is more secure. 
E) It produces fewer errors.

Question 19

Which of the following media can best withstand harsh environmental conditions?

Accepted Answer

A) shielded twisted pair 
B) unshielded twisted pair 
C) Cat 5 twisted pair 
D) coaxial cable 
E) fiber optic cable

Question 20

In simplex transmission, the data flows in both directions at the same time

Accepted Answer

A) True 
 B)False

Exam 3: Physical Layer

An) ___________ divides one high-speed communication circuit into several lower speed circuits for the primary reason of saving communication line costs.

What is the term used to describe the placing of two or more signals on a single circuit?

If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is?

The room that contains the cable termination points and the distribution frames is referred to as

With which type of digital signaling does the signal always return to zero volts after each bit?

In a multipoint circuit configuration, each computer can use the circuit at the same time.

What is coding? Briefly describe the two most important coding schemes.

Describe two common modem standards.

Which type of digital signaling would experience fewer errors because it has more distinct signals?

A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent through the connection.

__________ is a line-of-sight type of wireless media.

The representation of the character A by the group of 8 bits, 01000001, is an example of:

_____________ can be thought of as dividing the circuit horizontally.

Of all the media available, fiber optic provides the highest transmission speeds.

Fiber optic cable carries signals in traditional electrical form.

Describe two ways in which Statistical Time Division Multiplexing STDM) differs from Time Division Multiplexing TDM).

Which is not true about point-to-point circuits?

Which of the following is not a key advantage of digital transmission?

Which of the following media can best withstand harsh environmental conditions?

In simplex transmission, the data flows in both directions at the same time