Lesson 3 - exam Flashcards by Chrissy H.

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

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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

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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

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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

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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

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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

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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

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Which of the communication channel types would be the ideal choice for making a phone call?

Full-duplex
Half-duplex
Simplex
Complex

Full-duplex

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Which is a standard connector for unshielded twisted pair cable that resembles RJ-11 telephone jacks?

RJ-45
MT-RJ
USB
SC

RJ-45

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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

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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

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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

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In unshielded twisted pair cables, which category starts being able to push gigabit network speeds (1000+ Mbps)?

CAT4
CAT7
CAT5e
CAT5

CAT5e

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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

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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

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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