CPCT Mod Study Guide Quiz

What is the standard everyone in the USA refers to as the basis of structured cabling?

EIA/TIA 568

What is the international standard for structured cabling?

ISO-11801

What copper cable types are included in the TIA-568 structured cabling standards?

UTP (unshielded twisted pair), ScTP (screened twisted pair) and STP (shielded twisted pair)

What do Category 3, Category 5e and Category 6 designations mean?

The performance level of UTP cable

What is the cable from the telecom closet (room) to the work area called?

Horizontal cabling

What is the cabling from the telecom closet to the main cross connect or computer center called?

Backbone Cabling

Why is the structured cabling standard not like "code"?

It is not legally required

What other cables are recognized in the structured cabling standards?

Singlemode and Multimode fiber optic cable

What is the maximum length of a permanently installed UTP cabling link allowed in structured cabling standards?

90 meters

A. Backbone Cabling

B. Horizontal cabling

C. Work Area

D. Telecom Closet (Room)

E. Main Cross Connect

F. Centralized Fiber Cabling

C. Desktop Workstation

Premises cabling refers to cabling used for communications inside a building or limited to a campus.

True

Cabling standards are mandatory requirements for cables installed to meet building and electrical codes.

False

UTP cable can be used to power many devices such as VoIP phones and low speed wireless access points.

True

Fiber optic testing is easier than copper testing since only loss needs testing for premises cabling.

True

__ is the standard which forms the basis of structured cabling in the US?

EIA/TIA 568

The international standard for structured cabling is ?

ISO-11801

What cable types are included in the TIA-568 structured cabling standards?

UTP (unshielded twisted pair), ScTP (screened twisted pair), STP (shielded twisted pair) and fiber optics

What do category ratings of UTP cable (e.g. Cat 3, Cat 5e, Cat 6 and Cat 6A) mean?

The performance level of UTP cable

What is the cable from the telecom room (closet) to the work area called?

Horizontal Cabling

What is the installed cable plant from work area outlet jack to the patch panel in the telecom closet called?

Permanent Link

Why is the structured cabling standard not like "code"?

It's voluntary, not required by law

If the network does not require high bandwidth, it can share the 4 pairs in a UTP cable to transmit 2 Ethernet signals or one Ethernet and one voice line

True

Ethernet was first developed as a ____ architecture using _____ cable with _.

Bus, coax, taps

The development of _ provided a low cost cabling alternative for networks.

Balanced transmission on UTP cabling

FDDI and Token Ring networks used a ___architecture.

Ring

Ethernet changed from a to ___ network architecture when it switched to UTP cable.

Bus, star

Even require cabling connections in a network

Wireless access points

Until Gigabit Ethernet, LANs only used pairs of the UTP cable.

2

Gigabit Ethernet uses all four pairs of a UTP cable _.

Simultaneously and bidirectionally

Hardware like video cameras designed to run on coax can be used on UTP with a converter device called a _.

Balun

The single most important part of a wireless installation is proper placement of access points to insure proper coverage.

True

Practically anyone with a laptop and wireless card can access any wireless network unless security is carefully programmed.

True

Wireless networks are really used to replace .

The patchcord that connects a PC to a wall outlet connection

The common IEEE 802.11b wireless LAN is also called

Wifi

A wireless antenna is also known as a __.

Access point

Most wireless antennas connect to the Internet by _.

Structured cabling (Cat 5e or fiber)

IEEE 802.11b has a range of ___ feet.

300

Before beginning a wireless installation, it is most important that you .

Do a thorough site survey

Wireless access points can use _ to simplify powering the equipment.

Power over Ethernet (IEEE 802.3ah)

Potential sources of interference for wireless LANs include _.

• Remote controls like door openers

• Other wireless networks

• Moving objects

What do UTP Category 3, Category 5e and Category 6 designations indicate?

The frequency performance grade of the cable

What minimum level of UTP cable type is required by 1000Base-T (Gigabit Ethernet)

Cat 5e

What is the main characteristic of unshielded twisted pair Category 5e or Category 6 cable that gives it high frequency performance?

The rate of twists in the pairs of wires

Category 6A cable is specified and must be tested during certification to ___ MHz.

500

The name for the latest generation Cat 6 UTP cable for use with 10 Gigabit networks is _.

Augmented Cat 6

If you use an Cat 3 UTP jack on newer Cat 5e cable plant, the link performance will meet specs.

Cat 3

Before UTP cabling became widely used and the industry standard, most Ethernet Networks were connected over _ cable.

Coaxial

Wireless networks require cables to connect the server, router or hub to the .

AP (Access point)

Which network connection type has the highest bandwidth?

Optical fiber

Standard UTP (unshielded twisted pair) copper cabling for voice and data installations has how many pairs of wire?

Four

Attenuation in copper cable.

Is higher at higher frequencies

What optical fiber types are recognized in the structured cabling standards?

• Singlemode in backbone

• Multimode in horizontal connections

When terminating Cat 5e/6, what must be remembered to maintain the performance of the installed cable?

Keep the pairs twisted to within 1/2 inch of the termination

Why are punchdown blocks used with Cat 3 and Cat 5 cabling?

Interconnect cables in a telecom closet

Which punchdown block is more often used with data (Cat 5e/6)?

110 block

Which punchdown block is more often used with POTS telephone connections?

66 block

What actually makes the electrical connection with the wires in a 110 block?

Insulation displacement connectors in the connecting block

What kinds of connection to the cable does a UTP jack typically have?

110 punchdown

Does a jack have the same color code for the pairs as a punchdown block?

No

66 punchdown blocks have 4 contacts across a row. Why?

Allows connecting cables on opposite sides with bridging clips or wires

What color code order are wires punched down on a 66 block?

Just like a 110 block, BLOG (blue, orange, green, brown)

The Cat 3 jack is the same as a Cat 5e/6 jack except _.

There are no internal twists to enhance performance

What is a RJ-45 connector?

A modular 8 pin connector with USOC pinout

Below is the color code for ___.(Colors from left: 1-8: Blue stripe, Blue, Orange Stripe, Orange, Green Stripe, Green, Brown Stripe, Brown)

Punchdown blocks

How much untwist is allowed on Cat 5/5e/6 pairs at a punchdown block to maintain specified performance?

1/2 inch (13 mm)

The difference between the termination schemes of T568A and T568B is ?

Reversal of pairs 2 and 3

A crimp-on connector like the Cat 5e/Cat 6 connector is also called a connector.

Insulation-displacement

What UTP installation tool is needed for teminating most Cat 5e/6 jacks?

Punchdown tool with 110 blade

Structured cabling standards call for a maximum length of UTP cable for data of __.

100 meters

Structured cabling standards allow for a maximum length of permanently installed (not including patchcords) UTP cable for data of __.

90 meters

UTP cable installed above the ceiling can __ the celing tiles.

not be laid on

UTP cable installed above the ceiling in hot climates may not __.

Support full standard link distances

Structured cabling standards call for a maximum length of UTP cable for voice (POTS) of __.

800 meters

Structured cabling standards call for a maximum length of singlemode fiber optic cable for backbones of __.

3000 meters

Structured cabling standards call for a maximum length of multimode fiber optic cable for backbones of __.

2000 meters

For planning office layout, each user should be allocated _ floor space.

100 sq ft

Each floor should be allocated one _ when when floor space is under 10,000 sq ft.

Telcom room (closet)

Both equipment rooms and telecom rooms should have __.

All of the above

One cannot emphasize strongly enough the value of _.

Documentation

Riser cables are more easily installed by dropping cables down than pulling them up.

True

Power cables are a safety hazard because so many installations involve working in areas with many power cables.

True

The NEC does not refer to UTP or fiber cables because they are low voltage.

False

Electrical inspectors do not always inspect communications wiring.

True

Cable ties must not be so tight as to distort the jacket of the cable.

True

To maintain rated performance, twists in each pair must be maintained to within _ of the termination.

1/2 inch or 13 mm

UTP cable is designed to be pulled with no more than _ pounds tension.

25

Supports for UTP cables should be __.

Wide enough to support cables without distortion

___ should be used to bundle cables since ___.

Hook and loop cable ties, tight cable ties can affect cable performance

Most _ are designed to allow easy pulling to simplify installation.

Cable boxes

You can keep track of how much cable is left in a box if you ___.

Record on the cable box the beginning distance marked on the cable

Prior to cable plant acceptance or system turn-up, standards require that a(n) _ is used to test the cable plant to ensure it is within the loss budget.

LSPM or OLTS (Light source and power meter, optical loss test set)

In an industrial environment, fiber is most often used to.

Immunity to electrical noise prevents interference