Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
What is the difference about the method used to boost a digital signal's strength, compared with the method of boosting an analog signal's strenght?
|
a digital signal requires an amplifier, which introduces noise into the signal, and an analog signal requires a repeater, which transmits the signal in its original form
|
|
|
What is the origin of the word "modem"?
|
modulator/demodulator
|
|
|
With everything else being equal, which of the following transmission techniques is capable of the greatest throughput?
|
full-duplex
|
|
|
In wavelength division multiplexing, two modulated signals are guaranteed to differin what characteristic?
|
color
|
|
|
What can increase latency on a network?
|
adding 50 meters to the length of the network
|
|
|
What part of a cable protects it against environmental damage?
|
sheath
|
|
|
With everything else being equal, a network using what UTP type sill suffer the most crosstalk?
|
CAT 7
|
|
|
What are two advantages of using twisted-pair cabling over coaxil cabling on a network?
|
more reliable, required for modern transmission standards
|
|
|
In which network type would you use a cable with SC connectors?
|
1000BASE-LX
|
|
|
What physical layer specification requires twinaxial cable?
|
1000BASE-CX
|
|
|
What type of topology is required for use with a 100BASE-TX network?
|
star
|
|
|
How many wire pairs in a CAT 5 cable are actually used for transmission and reception on a 10BASE-T network?
|
two
|
|
|
On a 10BASE-T network, how are the wires of a UTP cable used to transmit and receive information?
|
one wire pair handles data transmission, while another wire pair handles data reception
|
|
|
What technique is used to achieve 1-Gbps throughput over a CAT5 cable?
|
all four wire pairs are used for both transmission and reception
|
|
|
What type of fiber-optic cable is used most frequently on LANs?
|
multimode fiber
|
|
|
What is the purpose of cladding in a fiber-optic cable?
|
it reflects the signal back to the core
|
|
|
What is a potential drawback to using fiber-optic cable for LANs
|
it is expensive
|
|
|
What is the maximum distance specified in the structured cabling standard for a horizontal wiring subsystem?
|
100m
|
|
|
On a 100BASE-TX ethernet network, where will you find the transceivers?
|
in the NICS
|
|
|
What is the maximum amount you should untwist twisted-pair wires before inserting them into connectors?
|
1/2 inch
|
|
|
What frequency range is shared by most new cellular telephones, some portable phones, and also the most popular type of wireless LAN?
|
2.4- 2.4835 GHz
|
|
|
To transmit and receive signals to and from multiple nodes in a three-story house, what type of antenna should an access point use?
|
omnidirectional
|
