Lesson 3 - exam Flashcards
Which of these is NOT true?
- Throughput is never more than bandwidth allows
- High latency is better than low latency
- Accuracy of data transmission is important
- Low latency is better than high latency
High latency is better than low latency
What does bandwidth mean?
- Bandwidth does not apply to network speed
- Bandwidth is the actual speed of your data
- Bandwidth is the theoretical maximum speed of your data
- Bandwidth is the theoretical minimum speed of your data
Bandwidth is the theoretical maximum speed of your data
What does latency mean?
- Latency is how long it takes for the computer to boot up
- Latency is the delay between when you request data and the time you actually receive it
- Latency is the amount of data you get compared to how much you asked for
- Latency is a required delay to make sure timing is fair on the network
Latency is the delay between when you request data and the time you actually receive it
Which of these statements is true?
- You should rarely expect delays when you ask for data
- You can expect to get just as much throughput as you ask for
- You should expect an average throughput which is less than the maximum speed, and you should expect an average delay called latency
- Data always travels the same speed on the network
You should expect an average throughput which is less than the maximum speed, and you should expect an average delay called latency
Why is it important to know the three types of communication in networking?
- To be efficient
- To be effective
- All answers are correct
- To have a cost effective solution
All answers are correct
Which one of the communication channels allows for data to be sent and received in both directions, but not at the same time?
- Complex
- Half-duplex
- Full-duplex
- Simplex
Half-duplex
Which service would a simplex channel be ideal for?
- A radio station
- A broadcast on TV
- All answers are correct
- An online video
All answers are correct
Which of the communication channel types would be the ideal choice for making a phone call?
- Full-duplex
- Half-duplex
- Simplex
- Complex
Full-duplex
Which is a standard connector for unshielded twisted pair cable that resembles RJ-11 telephone jacks?
- RJ-45
- MT-RJ
- USB
- SC
RJ-45
Crosstalk and attenuation are NOT a problem in which of the following media?
- Radio waves
- Fiber optic cable
- Coaxial cable
- Twisted pair cable
Fiber optic cable
CAT 3 and CAT 5 belong to which of the following cable categories?
- Shielded twisted pair cable
- Coaxial cable
- Fiber optic cable
- Unshielded twisted pair cable
Shielded twisted pair cable
Which of the following connectors are also used with multimode and single-mode fiber optic cables for accessing gigabit ethernet?
- Fiber LC
- RJ-45
- RJ-11
- MT-RJ
MT-RJ
In unshielded twisted pair cables, which category starts being able to push gigabit network speeds (1000+ Mbps)?
- CAT4
- CAT7
- CAT5e
- CAT5
CAT5e
Which of these is the most common cable type to connect a home network to a cable modem using an internet service provider?
- Unshielded twisted pair
- Coaxial
- Fiber optic
- CAT2
Coaxial
When internet service providers use fiber optic cables, which cable type are they most likely to use for home networks?
- Plastic optical cable
- Single-mode
- None of these answer are correct
- Multi-mode
Plastic optical cable
What is the main purpose of having a twisted pair cable?
- To double the transfer rate of data
- To cut down on costs
- To make installation easier
- To reduce electromagnetic interference from outside sources
To reduce electromagnetic interference from outside sources
The frequency range of a channel is 4000hz to 6500hz. What is the bandwidth?
- 2500 hz
- 4000 hz
- 10,500 hz
- 6500 hz
2500 hz
The link efficiency of a channel is 0.2 and bandwidth is 4000hz. What is the throughtput?
- 1000hz
- 2000hz
- 800hz
- 1500hz
800hz
What is the link efficiency of full duplex?
- Less than 50%
- Less than 25%
- More than 50%
- 100%
More than 50%
What kind of channel does broadband transmission use?
- Bandpass channel
- Medium pass channel
- Low pass channel
- High pass channel
Bandpass channel
In reference to computers and the internet, what is throughput?
- Throughput refers to letting data through when there is a problem
- Throughput refers to the actual speed of your data
- Throughput refers to the theoretical speed of your data
- Throughput refers to the lowest possible speed of your data
Throughput refers to the actual speed of your data
Many family members using the network connection at the same time reduces:
- Bandwidth
- Theoretical speed
- Delays
- Throughput
Throughput
In reference to computers and the internet, what is an appropriate analogy for throughput?
- Throughput is like an impatient golfer who wants to play through
- Throughput is like a clogged artery
- Throughput is like a clean artery
- Throughput is like a zombie movie
Throughput is like a clogged artery
In reference to computers and the internet, what is bandwidth?
- Bandwidth is the actual speed of your data
- Bandwidth is the speed of your data
- Bandwidth is the theoretical speed of your data
- Bandwidth is how wide your data can get
Bandwidth is the theoretical speed of your data
Optical fiber cable provides a higher transmission speed than copper wiring because:
- Bandwidth equals distance squared
- Light moves faster than an electrical signal
- Copper cables are owned by the power companies
- Copper cables are heavier so they’re slower
Light moves faster than an electrical signal
The core strand of an optical fiber can be made of what type of material?
- Copper
- Glass or Plastic
- Aluminum
- Resin gel
Glass or Plastic
What part of an optical fiber cable reflects light back into the core as the cable bends?
- Cladding
- Sheath
- Strand
- Connector
Cladding
An advantage of optical fiber over traditional copper wiring is:
- You can pull it tighter
- Less bulk
- Lower cost
- It can bend at greater angles than copper
Less bulk
What does throughput mean?
- Throughput is the fastest speed your data can travel on the network
- Throughput is the delay between the moment you demand data and the time you eventually get it
- Throughput is the actual amount of data you get in a certain amount of time
- Throughput is the slowest speed your data can travel on the network
Throughput is the actual amount of data you get in a certain amount of time
Which of the communication channel types allows for information to flow in both directions at the same time?
- Full-duplex
- None of these are correct
- Simplex
- Half-duplex
Full-duplex
Areas of weakness
Transmission Basics in Networking: Media Characteristics & Connector Types
Bandwidth vs. Throughput
Throughput vs. Latency
The type of fiber used typically for long distance runs is:
- Single-mode
- Serial fiber
- Multi-mode
- Wave-division multiplexing fiber
Serial fiber
What is the main advantage of using a shielded twisted pair (STP) cable for a network connection?
- There is no advantage to using one
- To cut back on electrical interference
- To enhance the network connection in a small room
- To focus the network connection in a large room
To cut back on electrical interference
What is simplex mode of communication?
- Specific sender but no specific receiver
- Only one sender and receiver.
- No specific sender or receiver
- No specific sender but specific receiver
Only one sender and receiver
