Chapter 3: Transmission & Networking Media

Question 1

What kind of channel does broadband transmission use?

Answer 1

Bandpass channel

Question 2

What is simplex mode of communication?

Answer 2

Only one sender and receiver.

Question 3

The frequency range of a channel is 4000hz to 6500hz. What is the bandwidth?

Answer 3

2500 hz

Question 4

The link efficiency of a channel is 0.2 and bandwidth is 4000hz. What is the throughtput?

Answer 4

800hz

Question 5

What is the link efficiency of full duplex?

Answer 5

More than 50%

Question 6

Which of the following connectors are also used with multimode and single-mode fiber optic cables for accessing gigabit ethernet?

Answer 6

MT-RJ

Question 7

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

Answer 7

RJ-45

Question 8

Which of the following media is comparatively cheaper, lighter, and easier to install?

Answer 8

Twisted pair cable

Question 9

CAT 3 and CAT 5 belong to which of the following cable categories?

Answer 9

Shielded twisted pair cable

Question 10

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

Answer 10

Full-duplex

Question 11

Which of the communication channel types allows for information to flow in both directions at the same time?

Answer 11

Full-duplex

Question 12

bandwidth

Answer 12

The theoretical speed of your data

Question 13

throughput

Answer 13

the actual speed of your data

Question 14

About computers and the internet, what is an appropriate analogy for throughput?

Answer 14

Throughput is like a clogged artery

Question 15

Many family members using the network connection at the same time reduces:

Answer 15

Throughput

Question 16

What does Mbps stand for?

Answer 16

megabits per second

Question 17

What is the most common cable type to connect a home network to a cable modem using an internet service provider?

Answer 17

Coaxial

Question 18

When internet service providers use fiber optic cables, which cable type are they most likely to use for home networks?

Answer 18

Plastic optical cable

Question 19

What is the main advantage of using a shielded twisted pair (STP) cable for a network connection?

Answer 19

To cut back on electrical interference

Question 20

What is the main purpose of having a twisted pair cable?

Answer 20

To reduce electromagnetic interference from outside sources

Question 21

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

Answer 21

CAT5e

Question 22

An advantage of optical fiber over traditional copper wiring is:

Answer 22

Less bulk

Question 23

Optical fiber cable provides a higher transmission speed than copper wiring because:

Answer 23

Light moves faster than an electrical signal

Question 24

The type of fiber used typically for long-distance runs is:

Answer 24

Single-mode

Question 25

Which part of an optical fiber cable reflects light back into the core as the cable bends?

Answer 25

Cladding

Question 26

The core strand of an optical fiber can be made of what type of material?

Answer 26

Glass or Plastic

Question 27

Which internet protocol is responsible for re-transmitting lost or erroneous data packets?

Answer 27

TCP

Question 28

Which internet protocol is responsible for moving data packets along the Internet network?

Answer 28

IP

Question 29

An IPv4 address contains _____ digits in _____ sets separated by a _____.

Answer 29

3; 4; period

Question 30

IPv4 requires that every system with connectivity to the Internet have a unique _____ internet address.

Answer 30

32-bit

Question 31

The organization that currently regulates and manages the Internet is _____.

Answer 31

ICANN

Question 32

Which organization is the precursor to ICANN?

Answer 32

IANA

Question 33

In reference to internet domain names, a registrar is _____.

Answer 33

A company that sells domain names

Question 34

Which protocol is suited for the current Internet?

Answer 34

TCP/IP

Question 35

What is the primary use for UDP?

Answer 35

Streaming

Question 36

UDP is what type of protocol?

Answer 36

Connectionless

Question 37

Controlling congestion with UDP is:

Answer 37

Up to the application

Question 38

Who was responsible for the creation of the UDP protocol?

Answer 38

David Reed

Question 39

Access a website by entering the _____ or _____ into the address bar of the Internet browser.

Answer 39

URL, IP address

Question 40

URL is an acronym for __________.

Answer 40

Uniform Resource Locator

Question 41

What will happen if you enter the IP address 142.250.191.206 into your web browser?

Answer 41

Google.com

Question 42

A _____ is two or more computers that communicate with one another.

Answer 42

network

Question 43

A computer can be accessed over the Internet via a host name or _____

Answer 43

IP address

Question 44

DNS servers use _____ servers to help resolve IP addresses to Domain Names

Answer 44

Authoritative servers

Question 45

DNS is an acronym for:

Answer 45

Domain Name System

Question 46

Authoritative name servers respond to queries from

Answer 46

recursive name servers

Question 47

_____ is an example of a TLD name.

Answer 47

.com

Question 48

When a user first makes a DNS query by typing the domain name into the web browser

Answer 48

The local DNS cache is queried

Question 49

To manage a given network, we require

Answer 49

SNMP

Question 49

What is the purpose of FTP?

Answer 49

To transfer a file in a network.

Question 49

Which protocol downloads a copy of an email and deletes the original email from the server?

Answer 49

POP3