Deck 3: Physical Transmission Options

Question 1

The larger the number associated with AWG, the smaller the diameter of the wire.

Answer 1

True

Question 2

A(n)multiplexer is a device that receives multiple inputs or signals from multiple sources and transmits them to one (usually)or more shared high-speed media.

Answer 2

True

Question 3

An advantage of twisted-pair cable compared to thin coax cable is that it is resistant to EMI and RFI.

Answer 3

False

Question 4

Resistance is defined as the total amount of opposition to the flow of current and is measured in ohms.

Question 5

Interfaces are devices to which the communications media connect.

Question 6

The maximum number of segments in 10BaseT UTP ethernet cable is 500.

Question 7

Ethernet communications at speeds up to 100 Mbps as defined under the IEEE 802.3u standard are called Fast Ethernet.

Question 8

On thick coax cable, if you attach devices more closely than 12.5 meters, the signal can be impaired, and network errors may result.

Question 9

One advantage of LDAP is that it enables information in different directory services to be shared.

Question 10

Wireless technologies are used in situations where it is difficult or too expensive to use cable and in situations in which flexibility to move network hosts and devices is a requirement.

Question 11

10 Gigabit Ethernet operates only at full duplex.

Question 12

The IEEE 802.12 standard uses the CSMA/CD transmission technique.

Question 13

The maximum speed of thick coax cable is 100 Mbps.

Question 14

The S in STP stands for standard .

Question 15

____ is the WAN standard for packet-switching networks.

A)X.400
B)X.25
C)X.435
D)V

Question 16

Fat pipe is another name for STP cable.

Question 17

A(n)driver is software that enables a computer to communicate with devices such as NICs, printers, monitors, and hard disk drives.

Question 18

ISDN is a WAN technology for delivering voice, data, and video services over telephone lines.

Question 19

Statistical multiple access is a switching method that enables multiple devices to communicate over the same communications medium by creating time slots in which each device transmits.

Question 20

The EIA/TIA-568 standard specifies that vertical cabling run between network equipment rooms, floors, and buildings.

Question 21

An AUI connects ____ cable to a network node.

A)coax
B)twisted-pair
C)fiber-optic
D)All of the above.

Question 22

The figure above shows ____ cable.

A)twisted pair
B)thick coax
C)thin coax
D)STP

Question 23

____ is/are based on copper wire construction.

A)Coaxial cable
B)Fiber-optic cable
C)Wireless media
D)Both A and B.

Question 24

The most basic level of communications is accomplished at the OSI ____ layer.

A)Network
B)Transport
C)Physical
D)Data Link

Question 25

The ____ standard is used for centralizing communication cable connections in specific locations.

A)EIA/TIA-569-A
B)ISO/IEC 11801
C)EIA/TIA-568
D)802.15

Question 26

____ is/are usually used to connect computers that demand high-speed LAN and WAN access.

A)Coaxial cable
B)Fiber-optic cable
C)Twisted pair cable
D)Wireless technologies

Question 27

____ are the standards for international exchange of e-mail and message handling.

A)X.400
B)X.25
C)X.435
D)V

Question 28

____ is/are used mainly in older LANs and in LANs that exist in areas with strong sources of signal interference.

A)Coaxial cable
B)Fiber-optic cable
C)Twisted pair cable
D)Wireless technologies

Question 29

The longest cable run in 10Base5 cable is ____.

A)10 meters
B)50 meters
C)100 meters
D)500 meters

Question 30

Thin coax cable is also known as ____.

A)10Base2
B)10Base10
C)RG-8
D)10Base5

Question 31

____ is the easiest type of cable to install and use.

A)Twisted pair
B)Thick coax
C)Thin coax
D)None of the above.

Question 32

____ is the most commonly used cabling.

A)Coaxial
B)Fiber-optic
C)Wireless media
D)Twisted pair

Question 33

Common practice is to limit runs on ____ cable to 90 meters or less.

A)twisted pair
B)thick coax
C)thin coax
D)plenum

Question 34

Which is not true about thick coax cable?

A)It is very durable.
B)It is very reliable.
C)It is inexpensive to install.
D)None of the above.

Question 35

The ____ standard introduced the client-to-directory access protocol (DAP)and directory-to-directory protocol (DSP).

A)X.400
B)X.25
C)X.435
D)X.500

Question 36

A(n)____ connector is used with twisted-pair cable.

A)ST
B)RJ-11
C)BNC
D)RJ-45

Question 37

The capacity of a channel to transmit data in terms of given speeds, such as 10Mbps, is its ____.

A)throughput
B)bandwidth
C)transmission speed
D)attenuation

Question 38

The ____ is a nonprofit international organization that sponsors conferences and publications and coordinates Internet standards.

A)IEEE
B)ISOC
C)ISO
D)ICANN

Question 39

The A in AUI stands for ____.

A)additional
B)added
C)attachment
D)alternate

Question 40

A(n)____ connector is used with thin coax cable.

A)AUI
B)MAU
C)BNC
D)RJ-45

Question 41

The longest cable run in 10BaseT UTP ethernet cable is ____.

A)10 meters
B)50 meters
C)100 meters
D)500 meters

Question 42

In____ multimode fiber-optic cable, signals all arrive at the same time and with less long-distance distortion than the other type of multimode fiber-optic cable.

A)step-index
B)even-index
C)graded-index
D)single-index

Question 43

____ communications through public dial-up lines and leased telephone lines represent the most basic WAN carrier communications.

A)SONET
B)ISDN
C)Point-to-point
D)T-carrier

Question 44

UTP cable is not susceptible to interference.

Question 45

____ is an established high-speed WAN alternative offered by several telecommunications companies.

A)SONET
B)ISDN
C)ATM
D)ANI

Question 46

A(n)____ connector is used most often with fiber-optic cable.

A)SC
B)RJ-11
C)BNC
D)RJ-45

Question 47

____ cable does not experience EMI or RFI.

A)Coaxial cable
B)Fiber-optic cable
C)Twisted pair cable
D)None of the above.

Question 48

Structured wiring are principles for cabling areas and network systems in a building, including backbones, wiring closets and equipment rooms, work areas, and building entrance cabling.

Question 49

____ options are used for short-distance communications.

A)Microwave
B)Satellite
C)Infrared
D)All of the above.

Question 50

A minimum bend radius is applicable when using thick coax cable.

Question 51

Category ____ twisted-pair cable has a transmission rate of 1000 Mbps.

A)5
B)6
C)5e
D)Both B and C.

Question 52

Cladding is a term used when discussing ____ cable.

A)twisted pair
B)thick coax
C)thin coax
D)fiber optic

Question 53

Which is not true about fiber-optic cable?

A)It is very difficult for someone to install unauthorized taps.
B)It is expensive to install.
C)It can be used for either analog or digital communications.
D)None of the above.

Question 54

____ is targeted for installations that use the Network layer, or layer 3, routed communications.

A)Fast Ethernet
B)Gigabit Ethernet
C)10 Gigabit Ethernet
D)Both A and B.

Question 55

The figure above is an example of thin coax cable.

Question 56

10 Gigabit Ethernet is the IEEE ____ standard.

A)802.12
B)802.3ae
C)802.3u
D)802.2

Question 57

Which is not true about demand priority?

A)It enables packets to travel up to 100 Mbps.
B)Because only the receiving node sees the transmitted packet, data cannot be viewed and decoded at any other node.
C)It can give high priority to multimedia and time-sensitive transmissions, so that voice and video are transmitted within appropriate time sequences to prevent excessive distortion.
D)None of the above.

Question 58

____ is commonly called 10BaseT cable.

A)STP
B)Thick coax
C)Thin coax
D)UTP

Question 59

____ does not use the CSMA/CD access method for transmission of signals.

A)100BaseT2
B)100BaseTX
C)100BaseFX
D)100BaseT4

Question 60

Wireless media are radio or microwaves.

Question 61

What is demand priority? What kind of networks use it? What IEEE standard uses this?

Question 62

What is attenuation?

Question 63

Attenuation in fiber-optic cable is measured in ____________________.

Question 64

The impedance of 10BaseT UTP ethernet cable is ____________________.

Question 65

The impedance of thin coax cable is ____________________.

Question 66

____________________ cable is Teflon-coated and does not emit a toxic vapor when burned.

Question 67

Upstream bandwidth is usually lower than downstream.

Question 68

A(n)____________________ cable is a cable that consists of a single cable sheath containing a combination of fibers and copper cables.

Question 69

List five factors that should be considered when choosing the best medium for a LAN or WAN.

Question 70

What is the difference between a baseband transmission and a broadband transmission?

Question 71

The EIA/TIA-568 standard specifies that ____________________ cabling be used to connect workstations and servers in the work area.

Question 72

Gigabit Ethernet uses demand priority.

Question 73

A CSU is like a digital modem that converts the received signal to one that can be placed on a network and be received by a workstation or server.

Question 74

What is a directory service? What does it do? Name one directory service.

Question 75

Packets are physically transmitted on a network by means of a network interface card.

Question 76

The ____________________ for optical fiber cable communications is the difference between the transmitted power and the resulting signal strength, or sensitivity, at the receiver as measured in decibels.

Question 77

What are the two types of fiber optic cable? What is the communications signal for each?

Question 78

What are the two kinds of twisted-pair cable? Which is preferred? Why?

Question 79

A(n)____________________ typically contains a fixed amount of data formatted to be transmitted at high speeds, from 155 Mbps to over 1 Gbps.

Question 80

____________________ cable is usually glass.