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Computer Science 108 > Chapter 3: Transmission & Networking Media > Flashcards

Chapter 3: Transmission & Networking Media Flashcards

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1
Q

What kind of channel does broadband transmission use?

A

Bandpass channel

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2
Q

What is simplex mode of communication?

A

Only one sender and receiver.

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3
Q

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

A

2500 hz

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4
Q

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

A

800hz

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5
Q

What is the link efficiency of full duplex?

A

More than 50%

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6
Q

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

A

MT-RJ

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7
Q

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

A

RJ-45

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8
Q

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

A

Twisted pair cable

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9
Q

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

A

Shielded twisted pair cable

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10
Q

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

A

Full-duplex

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11
Q

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

A

Full-duplex

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12
Q

bandwidth

A

The theoretical speed of your data

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13
Q

throughput

A

the actual speed of your data

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14
Q

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

A

Throughput is like a clogged artery

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15
Q

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

A

Throughput

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16
Q

What does Mbps stand for?

A

megabits per second

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17
Q

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

A

Coaxial

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18
Q

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

A

Plastic optical cable

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19
Q

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

A

To cut back on electrical interference

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20
Q

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

A

To reduce electromagnetic interference from outside sources

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21
Q

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

A

CAT5e

22
Q

An advantage of optical fiber over traditional copper wiring is:

A

Less bulk

23
Q

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

A

Light moves faster than an electrical signal

24
Q

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

A

Single-mode

25
Q

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

A

Cladding

26
Q

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

A

Glass or Plastic

27
Q

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

A

TCP

28
Q

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

A

IP

29
Q

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

A

3; 4; period

30
Q

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

A

32-bit

31
Q

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

A

ICANN

32
Q

Which organization is the precursor to ICANN?

A

IANA

33
Q

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

A

A company that sells domain names

34
Q

Which protocol is suited for the current Internet?

A

TCP/IP

35
Q

What is the primary use for UDP?

A

Streaming

36
Q

UDP is what type of protocol?

A

Connectionless

37
Q

Controlling congestion with UDP is:

A

Up to the application

38
Q

Who was responsible for the creation of the UDP protocol?

A

David Reed

39
Q

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

A

URL, IP address

40
Q

URL is an acronym for __________.

A

Uniform Resource Locator

41
Q

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

A

Google.com

42
Q

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

A

network

43
Q

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

A

IP address

44
Q

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

A

Authoritative servers

45
Q

DNS is an acronym for:

A

Domain Name System

46
Q

Authoritative name servers respond to queries from

A

recursive name servers

47
Q

_____ is an example of a TLD name.

A

.com

48
Q

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

A

The local DNS cache is queried

49
Q

To manage a given network, we require

A

SNMP

49
Q

What is the purpose of FTP?

A

To transfer a file in a network.

49
Q

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

A

POP3

49
Q
A

Computer Science 108 (3 decks)

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