Question 1

A ________ is a disturbance that propagates down a transmission medium to the other side,which reads it.

Accepted Answer

A) byte 
B) bit 
C) signal 
D) frame 
E) packet 
A) byte 
B) bit 
C) signal 
D) frame 
E) packet

Question 2

Multimode optical fiber quality is measured as MHz.km.

Accepted Answer

A) True 
 B)False

Question 3

Lower-wavelength light dominates in optical fiber because it ________.

Accepted Answer

A) is the least inexpensive 
B) can travel the farthest distances 
C) Both A and B 
D) Neither A nor B 
A) is the least inexpensive 
B) can travel the farthest distances 
C) Both A and B 
D) Neither A nor B

Question 4

Two-way amplifiers are needed for cable ________ service.

Accepted Answer

A) television 
B) data 
C) Both A and B 
D) Neither A nor B 
A) television 
B) data 
C) Both A and B 
D) Neither A nor B

Question 5

In optical fiber,a typical wavelength is ________.

Accepted Answer

A) 50 microns 
B) 850 microns 
C) Both A and B 
D) Neither A nor B 
A) 50 microns 
B) 850 microns 
C) Both A and B 
D) Neither A nor B

Question 6

Propagation effects can make a signal unreadable at the destination.

Accepted Answer

A) True 
 B)False

Question 7

Why is multimode fiber used instead of single-mode fiber for LAN transmission?

Accepted Answer

A) Lower cost. 
B) Higher speed. 
C) Longer propagation distance. 
D) All of the above. 
A) Lower cost. 
B) Higher speed. 
C) Longer propagation distance. 
D) All of the above.

Question 8

When a signal grows weaker as it travels,this is called ________.(Choose the most specific answer.)

Accepted Answer

A) a propagation effect 
B) noise 
C) interference 
D) attenuation 
E) All of the above. 
A) a propagation effect 
B) noise 
C) interference 
D) attenuation 
E) All of the above.

Question 9

Single mode fiber has a core diameter of ________.

Accepted Answer

A) 8.3 microns 
B) 62.5 microns 
C) Either A or B 
A) 8.3 microns 
B) 62.5 microns 
C) Either A or B

Question 10

ADSL offers symmetric service.

Accepted Answer

A) True 
 B)False

A ________ is a disturbance that propagates down a transmission medium to the other side,which reads it.

Multimode optical fiber quality is measured as MHz.km.

Lower-wavelength light dominates in optical fiber because it ________.

Two-way amplifiers are needed for cable ________ service.

In optical fiber,a typical wavelength is ________.

Propagation effects can make a signal unreadable at the destination.

Why is multimode fiber used instead of single-mode fiber for LAN transmission?

When a signal grows weaker as it travels,this is called ________.(Choose the most specific answer.)

Single mode fiber has a core diameter of ________.

ADSL offers symmetric service.

Networking: How We Got Here

Network Standards

Network Security

Network Management

Switched Wired Networks

Wireless Networks I

Wireless Networks 2

Tcp-Ip Internetworking

Internetworking 2

Networked Applications

More on Tcp-Ip

More on Modulation

More on Telecommunications

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Exam 5: Physical Layer Propagation

A ________ is a disturbance that propagates down a transmission medium to the other side,which reads it.

Multimode optical fiber quality is measured as MHz.km.

Lower-wavelength light dominates in optical fiber because it ________.

Two-way amplifiers are needed for cable ________ service.

In optical fiber,a typical wavelength is ________.

Propagation effects can make a signal unreadable at the destination.

Why is multimode fiber used instead of single-mode fiber for LAN transmission?

When a signal grows weaker as it travels,this is called ________.(Choose the most specific answer.)

Single mode fiber has a core diameter of ________.

ADSL offers symmetric service.

Networking: How We Got Here

Network Standards

Network Security

Network Management

Switched Wired Networks

Wireless Networks I

Wireless Networks 2

Tcp-Ip Internetworking

Internetworking 2

Networked Applications

More on Tcp-Ip

More on Modulation

More on Telecommunications

Filters