Lesson 1 (Structured Cabling)

Question 1

Structured cabling is defined as?

Answer 1

A telecommunication cabling system that consists of a number of standardized smaller subsystems

Question 2

What are the three categories of structured cabling

Answer 2

Voice
Data
Video

Question 3

The integration of media ( voice, data, video) onto common medium (UTP,COAX,fibre) is called?

Answer 3

Convergence

Question 4

What does WAN stand for

Answer 4

Wide area network

Question 5

What does MAN stand for

Answer 5

Metropolitan area network

Question 6

What does LAN stand for

Answer 6

Local area network

Question 7

Where the service provider terminates is called?

Answer 7

Point of demarcation or demarc

Question 8

On drawings the technical name for a demarc would be?

Answer 8

NID

Question 9

In commercial and industrial the demarc is sometimes called?

Answer 9

Node zero

Question 10

The arrangement of linking networks is called what?

Answer 10

Topology

Question 11

What are the two basic types of topology

Answer 11

Physical and logical

Question 12

What kind of topology has to do with the physical layout of devices including the cable installation

Answer 12

Physical

Question 13

What topology is how data is actually transfered within a network also known as protocol

Answer 13

Logical

Question 14

How many topologies are there total

Answer 14

7

Question 15

What kind of network has all nodes connected to a common transmission medium or cable called a trunk

Answer 15

Linear bus

Question 16

Linear bus advantages

Answer 16

Easily disconnect nodes

Question 17

Linear bus disadvantages

Answer 17

Not reliable

If the trunk cable is down everything is down

Question 18

What network l; all devices on this network connect to a central point. The central point or hub then re directs the signal to the proper destination

Answer 18

Star

Question 19

Star network advantages

Answer 19

Easy to add additional devices with no service interruption

Question 20

Star network disadvantage

Answer 20

The hub represents a single point of failure…. Not reliable

Question 21

What network; devices in this system are connected in a large ring of a closed loop

Answer 21

Ring network

Question 22

Advantages of a ring network

Answer 22

System performs better under heavy network load and the server does not need to manage connectivity to each device

Question 23

Disadvantage of a ring network

Answer 23

One bad workstation and the system goes down.

Making any changes will also affect network operation

Question 24

What network; allows for many servers and the ability to branch out the network in many ways

Answer 24

Tree or expanded star

Question 25

Advantages of a tree network

Answer 25

Easy to add more nodes; reliable network and some level of redundancy with multiple servers

Question 26

Disadvantage of a tree or expanded star

Answer 26

The overall length of each segment is limited. (100m) More difficult to wire than other topologies

Question 27

Ok what network; each network device is interconnected with one another. It allows the most transmissions to be distributed even if one of the connections go down.

Answer 27

Mesh

Question 28

What network; the data hops from one node to the other until the destination is received. Commonly used for wireless networks(wifi)

Answer 28

Mesh

Question 29

Mesh disadvantage

Answer 29

Disadvantages: expensive to have this if it is a physical connection

Question 30

What network or topology does not have a single point of failure.

Answer 30

Hybrid a combo of two or more topologies

Question 31

What topology is the most reliable

Answer 31

Hybrid

Question 32

What are the two types of protocol

Answer 32

Ethernet Token ring

Question 33

What cabling; vertical cabling, running of communication lines between floors or between buildings. Cables are consolidated at different points, then distributed through the building

Answer 33

Backbone cabling

Question 34

For backbone cabling what kind of cable if preferred

Answer 34

Fibre

Question 35

What standard has become the model for most premise cabling

Answer 35

568 standard

Question 36

What allows installing the full cabling network without regard to its ultimate use

Answer 36

568 standard

Question 37

The 568 standard will support __________,_____________and__________ over short distances of ________

Answer 37

Voice data and video 100m

Question 38

Cabling in a building can be divided into what two sections

Answer 38

Backbone and horizontal

Question 39

What kind of cabling; from the TR's. Each floor these cables now run to different workspaces on the same floor

Answer 39

Horizontal cabling

Question 40

The horizontal standard limits the length of the horizontal cables to _________m

Answer 40

100m

Question 41

Most common cables for cabling would be

Answer 41

Cat 5E Cat 6

Question 42

What are points where the cables are connected. Forms demarcation between different parts of the cabling system.

Answer 42

Cross connects

Question 43

T or F the characteristic impedance of a cable is a measurement of its resistance

Answer 43

False

Question 44

Impedance is largely determined by the cable what?

Answer 44

Insulation capacitance

Question 45

T or F the length of the cable effects it's impedance

Answer 45

False

Question 46

T or F distortion of the insulation by excessive pulling, kinks, crimps from fastening do effect the impedance

Answer 46

True

Question 47

Impedance is frequency dependent T or F

Answer 47

True

Question 48

T or F all components in a system must have the same characteristic impedance or losses will occur

Answer 48

True

Question 49

T or F Damage, shorts, opens or any mismatch causes reflected signals which can cancel out the main signal

Answer 49

True

Question 50

Most common impedances of coax

Answer 50

75 50

Question 51

Most UTP have an impedance of

Answer 51

100

Question 52

What is the most common cable in networking

Answer 52

UTP

Question 53

What is the difference between cat 5e and cat6

Answer 53

Twist rate

Question 54

UTP is typically what size

Answer 54

22 awg

Question 55

Advantages of a UTP

Answer 55

Inexpensive simple to install

Question 56

Disadvantage of a UTP

Answer 56

Subject to interference Limited bandwidth

Question 57

What UTP has a shield surrounding all wires

Answer 57

Screened twisted pair

Question 58

What is the main purpose of a screened twisted pair

Answer 58

Greater immunity to outside noise or EMI

Question 59

Advantages of a screened twisted pair

Answer 59

Less interference from EMI

Question 60

Disadvantage of a screened twisted pair

Answer 60

More expensive Harder to terminate

Question 61

Difference of a shield twisted pair than a screened twisted pair

Answer 61

Shielded has individual wrapped wire sets

Question 62

The shield on the shielded twisted pair allows?

Answer 62

Higher bandwidth and longer distances than sctp and utp

Question 63

What cable offers the best high frequency performance of all copper cables

Answer 63

Coax

Question 64

The components of a coax are coaxial which means?

Answer 64

They share the same axis

Question 65

On a coax the signal travels down the __________ and returns on the ________________

Answer 65

Center core Metallic shield

Question 66

What is the purpose of the shield of a coax

Answer 66

Confine the energy within the cable

Question 67

Biggest problem of a coax?

Answer 67

Poor connections at the ends

Question 68

Advantages of a coax

Answer 68

Easy to install Low attenuation Greater bandwidth Highky resistant to interference

Question 69

Disadvantage of a coax

Answer 69

Expensive Bulky

Question 70

RG for coax stand for

Answer 70

Radio grade

Question 71

Difference ein RG 6 and rg 59

Answer 71

RG 6 has a larger core thicker insulation and 2-4 layers of shielding

Question 72

What cable transmits photons through air

Answer 72

Optic fibre

Question 73

What cable span long distances and provide the backbone to many systems

Answer 73

Fibre optic

Question 74

Fibre cables use what? Instead of electronic pulses

Answer 74

Light pulses

Question 75

What does the transmitter do for fibre optic

Answer 75

Converts the digital signal into the equivalent light

Question 76

What does a receiver do for fibre optic

Answer 76

An optical detector converts the pulses back into a digital signal ones and zeroes

Question 77

Advantages of a fibre optic

Answer 77

Speed Bandwidth Distance Resistance Secure Light weight Maintenance

Question 78

Two different types of fibre optic

Answer 78

Multimode Single mode

Question 79

Single mode optic allows

Answer 79

Higher bandwidth for longer distances

Question 80

Single mode is more expensive than multimode true or false

Answer 80

True

Question 81

Multicore allows

Answer 81

Higher bandwidth for short distances

Question 82

In multimode disadvantages

Answer 82

Can distort and deliver incomplete data at long runs

Question 85

Cable tray access is important how much height is required

Answer 85

1'