Chapter 5 Flashcards
1
Q
Using DWDM, a single fiber can carry between what two numbers of channels? A) 60 B) 80 C) 160 D) 200
A
B) 80
C) 160
2
Q
What two items below are commonly expressed as bits transmitted per second? A) frequency B) amplitude C) throughput D) bandwidth
A
C) throughput
D) bandwidth
3
Q
What two connector types are typically used to terminate RG-6 and RG-59 cables? A) f-connectors B) BNC C) ST couplers D) J-hooks
A
A) f-connectors
B) BNC
4
Q
Frequencies used to convey speech over telephone lines fall between what two frequencies below? A) 100 Hz B) 300 Hz C) 3.3 KHz D) 5.5 KHz
A
B) 300 Hz
C) 3.3 KHz
5
Q
What is the maximum supported throughput and bandwidth / signal rate of Cat 5e? A) 100 Mbps B) 1000 Mbps C) 100 MHz D) 350 MHz
A
B) 1000 Mbps
D) 350 MHz
6
Q
What term below is used to describe the outer-most layer of protective covering of a coaxial cable? A) sheath B) shield C) braiding D) insulation
A
A) sheath
7
Q
What Ethernet standard below is also referred to as "thinnet"? A) 100Base2 B) 10Base2 C) 100BaseT D) 10BaseT
A
B) 10Base2
8
Q
What is the minimum category of UTP cable required in order to support Gigabit speeds? A) Cat 3 B) Cat 5 C) Cat 5e D) Cat 6
A
C) Cat 5e
9
Q
What is the maximum supported throughput of a CAT6 cable? A) 100 Mbps B) 1 Gbps C) 10 Gbps D) 100 Gbps
A
C) 10 Gbps
10
Q
How many cable pairs are needed for 1000Base-T transmission over CAT5e cable? A) 2 B) 4 C) 6 D) 8
A
B) 4
11
Q
Standard PoE devices must be provided with how much power in order to function? A) 5 watts B) 12 watts C) 15.4 watts D) 25.5 watts
A
C) 15.4 watts
12
Q
What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber? A) 550m B) 300m C) 10km D) 40km
A
D) 40km
13
Q
What type of cross-talk occurs between wire pairs near the source of a signal? A) far end cross talk B) near end cross talk C) alien cross talk D) pair migration cross talk
A
B) near end cross talk
14
Q
Which of the following connectors is the most common for mutlimode fiber? A) ST B) SC C) FC D) MT-RJ
A
D) MT-RJ
15
Q
A measure of a signal's strength at any given time is known as which term below? A) amplitude B) frequency C) phase D) wavelength
A
A) amplitude
16
Q
The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as what term below? A) amplitude B) frequency C) wavelength D)phase
A
B) frequency
17
Q
WDM divides a beam of light into how many different wavelengths or colors? A) 10 B) 20 C) 30 D) 40
A
D) 40
18
Q
Which type of multiplexing is defined by wavelength instead of frequency? A) CWDM B) DWDM C) WDM D) FDM
A
A) CWDM
19
Q
Which option below reflects the standard impedance of an RG-6 cable? A) 50 ohms B) 60 ohms C) 65 ohms D) 75 ohms
A
D) 75 ohms
20
Q
Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line? A) WDM B) FDM C) DWDM D) CWDM
A
B) FDM
21
Q
The most common multiplexing technology used in conjunction with fiber optics is which option below? A) DWDM B) CWDM C) FDM D) WDM
A
A) DWDM
22
Q
A device that is responsible for modulating digital signals into analog signals, and demodulating analog signals into digital signals at the receiving end, is known as? A) a modem B) a transceiver C) a demuxer D) a multiplexer
A
A) a modem
23
Q
Ethernet is an example of what type of technology? A) broadband B) baseband C) wideband D) narrowband
A
B) baseband
24
Q
Since cable TV and cable internet can share the same coaxial cable, they are considered to be what type of technology? A) broadband B) baseband C) narrowband D) wideband
A
A) broadband
25
Q
Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options? A) embedding B) multiplexing C) coupling D) modulating
A
B) multiplexing
