Deck 2: Network Media

Question 1

A circuit switched network is ideal for _____ communications because there are no interruptions from other devices or delays.

A) data
B) voice
C) LAN
D) WAN

Answer 1

B

Question 2

Baseband signaling requires that a modem be used.

Answer 2

False

Question 3

Coaxial cable has a single copper wire at its center and is surrounded by insulation and shielding.

Answer 3

True

Question 4

Unshielded twisted pair (UTP) cables have a foil shielding on the inside of the jacket that reduces interference.

Question 5

In a _____ switched network, dedicated and direct physical connection is made between the sender and the receiver.

A) wired
B) token
C) packet
D) circuit

Question 6

Spread spectrum is a technique that takes a narrow signal and spreads it over a broader portion of the radio frequency band.

Question 7

A directed transmission requires that the emitter and detector be aimed directly at one another.

Question 8

Broadband signaling uses analog transmission.

Question 9

The standard bus for personal computers is the Universal Supply Bus (USB).

Question 10

Switching involves moving a _____ from one wire or frequency to another.

A) signal
B) token
C) NIC
D) bus

Question 11

Baseband signaling sends one data signal across the network media.

Question 12

A network interface card (NIC) serves as the connection between the personal computer and the network media.

Question 13

One of the functions of a network interface card (NIC) is to create packets.

Question 14

Circuit switching is used for data communications, while voice conversations are always sent through packet switched networks.

Question 15

With a circuit switched network, a dedicated and direct physical connection is made between the sender and the receiver.

Question 16

Packet switching requires that the data transmission be broken into smaller units called _____.

A) circuits
B) NICs
C) PCRs
D) packets

Question 17

Category 5 cables are the most common type of unshielded twisted pair (UTP) used for networks.

Question 18

A network interface card (NIC) is always found outside the computer as a separate device.

Question 19

Packet switching allows _____ device(s) to share one line or frequency.

A) no
B) multiple
C) one
D) none of the above

Question 20

The source of near end crosstalk (NEXT) interference is from another data signal being transmitted.

Question 21

The connectors used on the ends of a thin coaxial cable are known as ____________________ connectors.

Question 22

A standard size of a fiber optic cable is _____.

A) 27.5 centimeters
B) 500x250 millimeters
C) 16 inches
D) 62.5/125 microns

Question 23

Interference is also called ____________________.

Question 24

Most computer networks using twisted pair cable have only _____ pairs of wires.

A) two
B) four
C) six
D) eight

Question 25

The type of cable that uses a very thin cylinder of glass at its center and sends light impulses is _____.

A) fiber optic
B) twisted pair
C) unshielded twisted pair
D) coaxial

Question 26

Fiber optic cables are available in _____ modes.

A) two
B) three
C) four
D) five

Question 27

_____ format is made up of short impulses of off and on.

A) Digital
B) Analog
C) Voice
D) Broadband

Question 28

Each is a standard for unshielded twisted pair except _____.

A) Category 4
B) Category 4e
C) Category 5
D) Category 5e

Question 29

_____ cable has a single copper wire at its center and is surrounded by insulation and shielding.

A) Fiber optic
B) Telephone
C) Category 9
D) Coaxial

Question 30

A device known as a _____ converts data from a digital signal to an analog signal and back again.

A) NIC
B) switch
C) modem
D) baseband configurator

Question 31

There are two basic types of copper cables used for networks, ____________________ and twisted pair.

Question 32

Because a data transmission signal is an electrical impulse, _____ is excellent for transmitting computer network data.

A) wood
B) copper
C) steel
D) brass

Question 33

_______________________________ refers to interference caused by broadcast signals from a radio or television transmitter.

Question 34

_____ cable, which looks similar to the cable that carries a cable TV signal, is approximately one-quarter of an inch in diameter.

A) Telephone
B) Fiber optic
C) Thin coaxial
D) Twisted pair

Question 35

The connector found on the end of a twisted pair data cable is called _____.

A) RJ-11
B) RJ-45
C) RJ-8983
D) NICR

Question 36

_____ signaling sends one data signal across the network media.

A) Broadband
B) Circuit
C) Analog
D) Baseband

Question 37

A loss of signal power over distance is known as ____________________.

Question 38

Cellular phones, citizens band and police radios, small office or household appliances, fluorescent lights, and loose electrical connections can all cause _____.

A) NEXT
B) FEXT
C) EMI
D) RFI

Question 39

A loss of signal power is known as _____.

A) attenuation
B) RFI
C) NEXT
D) EMI

Question 40

_____ light, often used for wireless transmissions, shares the same properties as visible light.

A) Infrared (IR)
B) Blue
C) Laser
D) Spectrum

Question 41

There are two types of twisted pair cables, shielded twisted pair (STP) and ______________________________.

Question 42

Tell how error correction in a packet switching network is efficient.

Question 43

List the four basic functions that a network interface card (NIC) performs when transmitting data.

Question 44

Explain how fiber optic cables transmit data.

Question 45

A fiber optic cable consists of a very thin strand of glass called the ____________________.

Question 46

____________________ cable has become today's standard for copper cabling used in computer networks, replacing thin coaxial cable.

Question 47

______________________________ cables have connectors on the end that closely resemble those found on a modular telephone cable.

Question 48

Explain how broadband signaling functions.

Question 49

The newest category of unshielded twisted pair cable is Category ____________________.

Question 50

Give some examples of how wireless technology can be used in a school.