Physical Networking Final Practice

Question 1

What is a fiber-optic microscope used for when installing a connector on a fiber optic cable?

Answer 1

Detecting dirty, cracked or scratched connectors

Question 2

Why would you choose mechanical splicing over fusion splicing?

Answer 2

Initial setup cost

Question 3

What type of mismatches can affect how well a splice performs?

Answer 3

Core diameter and Mode field diameter

Question 4

What 3 parts make up a fiber optic receiver?

Answer 4

Receptacle, optical subassembly electrical subassembly

Question 5

Which of the following cables are commonly used in connections to equipment and patch panels?

Answer 5

Cordage

Question 6

What can visual fault indicator help you determine

Answer 6

Breaks macrobends poor fusion splices

Question 7

What other tool do you need when working with an optical power meter?

Answer 7

light source

Question 8

How are optical fibers and copper different?

Answer 8

both can send digital data, both are used for communication optical fibers are not effected by emi

Question 9

what types of things should you include when documenting the results of you OTDR testing?

Answer 9

number id of the cable test procedure number, pulse width, wavelength, model of otdr, dead/launch, zone specs

Question 10

What are some sources of crosstalk?

Answer 10

not enough twisting inferior components, shoddily made patch cables, poor shielding

Question 11

Name some of the parts that make up an optical fiber?

Answer 11

core, cladding jackets, sheath, coating, jacket, strength members

Question 12

Name some common strength members materials used in fiber optics.

Answer 12

Aramid yarns Kevlar, steel fiberglass rods

Question 13

How does dispersion affect optical fiber?

Answer 13

Blurs the digital signals together and degrades the distinct pulses of light making it unreadable

Question 14

What does the numerical aperature express

Answer 14

the light gathering ability of the fiber

Question 15

Which of these are used to make optical fiber?

Answer 15

Modified chemical vapor deposition and vapor axial deposition

Question 16

What effect does EMI have on fiber-optic cable

Answer 16

None

Question 17

what is tensile strength?

Answer 17

Resistance to stretching

Question 18

What is the purpose of an optical filter

Answer 18

Selectively permits transmission or blocks out a range of wavelengths

Question 19

Name 3 kinds of cable types used in a fttx passive optical network

Answer 19

Drop cable distribution cable, feeder cable

Question 20

Name some components to a passive optical network

Answer 20

grid isolation hub optical attenuator, optical eye to eye coupler, optical filter

Question 21

Name some ways to safely round up loose fiber after cleaving

Answer 21

use a mat, create a barrier around you work area, us tweezers, use double sided tape to pick them up

Question 22

In the event of an emergency what should you first response be on a job site?

Answer 22

Remain calm

Question 23

What are some safety precaution you need to take when working around lasers and fiber optics

Answer 23

wear protective eyewear, hazardous laser areas should be labeled with warning signs, assume that a fiber has a light source even though it is invisible

Question 24

List some items that are necessary on a request for proposal

Answer 24

details on the work area components of the cabling infrastructure the desired outcomes input from other stakeholders

Question 25

What are some important things during the vendor selection phase after submitting a RFP

Answer 25

Making sure the vendor has the proper certifications, balance out cost performance and customer support in a vendor, references on past jobs that are similar

Question 26

Define a microbend in a fiber optic cable and how can they caused?

Answer 26

small distortions in the boundary layer between the core and the cladding. The can be caused by the packaging of the cable.