Lesson 3 Flashcards
What is the link efficiency of full duplex?
more than 50%’.
The frequency range of a channel is 4000hz to 6500hz. What is the bandwidth?
2500 hz
What is simplex mode of communication?
Only one sender and receiver.
What kind of channel does broadband transmission use?
bandpass channel
The link efficiency of a channel is 0.2 and bandwidth is 4000hz. What is the throughput?
800 hz
Crosstalk and attenuation are NOT a problem in which of the following media?
Fiber optic cable
Which of the following media is comparatively cheaper, lighter and easier to install?
Twisted pair cable
Which is a standard connector for unshielded twisted pair cable that resembles RJ-11 telephone jacks?
RJ-45
Which of the following connectors are also used with multimode and single-mode fiber optic cables for accessing gigabit ethernet?
MT-RJ
CAT 3 and CAT 5 belong to which of the following cable categories?
Shielded twisted pair (STP)
Why is it important to know the three types of communication in networking?
All answers are correct
The three different channel types all have their ideal uses. It is essential to know which type to use so that you can implement a strategy that is the most efficient, effective, and affordable solution.
Which one of the communication channels allows for data to be sent and received in both directions, but not at the same time?
Half-duplex
Which service would a simplex channel be ideal for?
All answers are correct
Which of the communication channel types allows for information to flow in both directions at the same time?
Full-duplex
Which of the communication channel types would be the ideal choice for making a phone call?
Full-duplex
In reference to computers and the internet, what is throughput?
Throughput refers to the actual speed of your data
In reference to computers and the internet, what is an appropriate analogy for throughput?
Throughput is like a clogged artery
Many family members using the network connection at the same time reduces:
Throughput
What does Mbps stand for?
megabits per second
In reference to computers and the internet, what is bandwidth?
Bandwidth is the theoretical speed of your data
What does latency mean?
Latency is the delay between when you request data and the time you actually receive it
What does throughput mean?
Throughput is the actual amount of data you get in a certain amount of time
Which of these is NOT true?
High latency is better than low latency
What does bandwidth mean?
Bandwidth is the theoretical maximum speed of your data
Which of these statements is true?
You should expect an average throughput which is less than the maximum speed, and you should expect an average delay called latency
What is the main advantage of using a shielded twisted pair (STP) cable for a network connection?
To cut back on electrical interference
Which of these is the most common cable type to connect a home network to a cable modem using an internet service provider?
Coaxial
What is the main purpose of having a twisted pair cable?
To reduce electromagnetic interference from outside sources
When internet service providers use fiber optic cables, which cable type are they most likely to use for home networks?
Plastic optical cable
In unshielded twisted pair cables, which category starts being able to push gigabit network speeds (1000+ Mbps)?
CAT5e
An advantage of optical fiber over traditional copper wiring is:
lighter, less bulky
Optical fiber cable provides a higher transmission speed than copper wiring because:
Light moves faster than an electrical signal
The core strand of an optical fiber can be made of what type of material?
Glass or Plastic
The type of fiber used typically for long distance runs is:
single mode fiber
What part of an optical fiber cable reflects light back into the core as the cable bends?
cladding
