Chapter 3

Question 1

three types of popular cables used in modern networking designs: p55

Answer 1

Coaxial
Twisted pair
Fiber optic

Question 2

contains a center conductor made of copper that’s sur- rounded by a plastic jacket, with a braided shield over it. p55.

Answer 2

Coaxial Cable

Question 3

A plastic such as polyvinyl chloride (PVC) or fluoroethylenepropylene (FEP, commonly known as. p56

Answer 3

Teflon

Question 4

The Teflon-type covering is frequently referred to as a what.p56

Answer 4

plenum-rated coating

Question 5

becomes a serious hazard because its insulation gives off poisonous smoke that gets circulated throughout the whole building.p56

Answer 5

plenum cable

Question 6

RG-58 U N/A
RG-58 A/U Thinnet
RG-8 Thicknet
RG-59 Cable television 
Low cost, short distance
RG-6 Cable television, cable modems 
Longer distances than RG-59; some power implementations
RG-62 ARCnet (obsolete)p57-58

Answer 6

None        Solid copper
10Base-2  Stranded copper
10Base-5  Solid copper
 N/A           Solid copper
N/A             Solid copper
N/A             Solid/stranded

Question 7

What are Twisted-pair cable. p58

Answer 7

consists of multiple individually insulated wires that are twisted together in pairs. Sometimes a metallic shield is placed around them; hence the name shielded twisted- pair (STP).

Question 8

Cable without outer shielding is called.58

Answer 8

unshielded twisted-pair (UTP)

Question 9

Ethernet Cable type is the most common today for the following reasons.p59

Answer 9

It’s cheaper than other types of cabling.
It’s easy to work with.
It allows transmission rates that were impossible 10 years ago

Question 10

connectors; you use a_________ to attach them to a cable, just as you would with BNC connectors. p61

Answer 10

crimper

Question 11

transmits digital signals using light impulses rather than electricity, it’s immune to EMI and RFI. p61

Answer 11

Fiber-Optic Cable

Question 12

(SMF) stands for what. p63

Answer 12

single-mode fiber (SMF)

Question 13

(MMF)stands for what. p63

Answer 13

multimode fiber (MMF)

Question 14

is a very high-speed, long-distance media that consists of a single strand—sometimes two strands—of fiber glass that carries the signals. p63

Answer 14

Single-mode fiber-optic cable (SMF)

Question 15

uses light to communicate a signal; but with it, the light is dispersed on numerous paths as it travels through the core and is reflected back. p63

Answer 15

Multimode fiber-optic cable (MMF)

Question 16

A special material called______ is used to line the core and focus the light back onto it. p63

Answer 16

cladding

Question 17

A whole bunch of different types of connectors are available to use with fiber-optic cables, but the two most popular are the what. p63

Answer 17

straight tip (ST) and subscriber (or square) connector (SC)

Question 18

It allows more fiber-optic terminations in the same amount of space than its standard-sized counter- parts.pp63

Answer 18

small form factor (SFF)

Question 19

(MT-RJ or MTRJ)stands for what. p64

Answer 19

mechanical transfer registered jack (MT-RJ or MTRJ)

Question 20

(LC)stands for what. p64

Answer 20

Local Connector (LC)

Question 21

What does serial mean. p68

Answer 21

means that one bit after another is sent out onto the wire or fiber and interpreted by a network card or other type of interface on the other end.

Question 22

cable standard commonly used for serial data signals connecting data-terminal equipment and data-communications equipment, as when you connect a computer’s serial port to an external modem. p69

Answer 22

RS-232

Question 23

can actually connect a maximum of 127 external devices, and it’s a much more flexible peripheral bus than either serial or parallel. p69

Answer 23

Universal Serial Bus (USB)

Question 24

a device can either send communication or receive communication, but not both at the same time. p71

Answer 24

half-duplex

Question 25

both devices can send and receive communication at the same time. p71

Answer 25

full-duplex

Question 26

There are different types of wiring standards available: p72

Answer 26

Straight-through cable (586A)
Crossover cable (586B)
Rolled cable (rollover)
Hardware loopback

Question 27

What is a Straight-Through Cable. p75

Answer 27

The straight-through cable is used to connect a host to a switch or hub, or a router to a switch or hub.

Question 28

Crossover cables can be used to connect these devices: p75

Answer 28

Switch to switch
Hub to hub
Host to host
Hub to switch
Router direct to host

Question 29

network interface device (NID) or network interface unit, is owned by the PSTN and is a special network interface that’s often used between the service provider’s network and the internal network.p80

Answer 29

Smart Jack

Question 30

the last point of responsibility of the service provider. It’s often at the MDF in your building connection (if your building is large), but it’s usually just an RJ-45 jack that your channel service unit/data service unit (CSU/DSU) connects into from your router to wide area network (WAN) connections p79

Answer 30

demarc (short for demarcation)

Question 31

has replaced most telephone wire installations and is also used for computer networking.p79

Answer 31

110 Block

Question 32

cable consists of 25 individual pairs of wires all inside one common insulating jacket. It’s not generally used for data cabling, just for telephone cabling, and especially for backbone and cross-connect cables because it reduces the cable clutter significantly. p79

Answer 32

25 Pair

Question 33

a wiring point that’s generally used as a reference point for telephone lines. It’s installed in the building as part of the pre-wiring, and the internal lines are connected to it. p79

Answer 33

main distribution frame (MDF)

Question 34

located in an equipment or telecommu- nications room. It is connected to the MDF and is used to provide greater flexibility for the distribution of all the communications lines to the building. p79

Answer 34

intermediate distribution frame (IDF)