Premises Cabling UTP Testing (original) (raw)
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1.
What is a "certified" UTP cable?
| A. | Cable tested to EIA/TIA 568 specifications |
|---|---|
| B. | Cable tested by an automated tester |
| C. | Cable tested to both Cat 3 and Cat 5 specifications |
| D. | Cable tested to "enhanced Cat 5” or “augmented Cat 6” specifications |
2.
Every UTP link must be first tested for correct connections or "wiremap." What else must be tested?
| A. | Attenuation and crosstalk |
|---|---|
| B. | Attenuation and ACR |
| C. | Length, attenuation and crosstalk |
| D. | Length and ACR |
3.
What instrument measures the length of a cable?
| A. | Network analyzer |
|---|---|
| B. | Wiremapper |
| C. | Time domain reflectometer (TDR) |
| D. | All of the above |
4.
Why is "Powersum NEXT" important in new cable plants?
| A. | Higher speed networks need less crosstalk |
|---|---|
| B. | New networks will have signals on all the pairs in the cable |
| C. | Cat 5e and Cat 6 cable are more sensitive to crosstalk |
| D. | It's a marketing issue, not a technical issue |
5.
What is included in a channel test that is not included in a permanent link test?
| A. | Patchcords on either end of the link |
|---|---|
| B. | Extra attenuation from the connections at the ends |
| C. | Longer cable lengths |
| D. | Performance of the networking equipment |
6.
In testing wiremaps, what fault is sometimes missed by inexpensive wiremappers?
| A. | Crossed pairs |
|---|---|
| B. | Reversed pairs |
| C. | Split pairs |
| D. | Delay skew |
7.
What is the most likely cause of crossed pairs?
| A. | Misreading color codes on a Cat 3 jack |
|---|---|
| B. | Terminating one end as T568A and the other as T568B |
| C. | Using a Cat 3 jack on one end and a Cat 5e/6 jack on the other |
| D. | Termination of the jack using the BLOGBr color code sequence |
8.
Impedance mismatches in cables cause problems with__________.
| A. | Attenuation |
|---|---|
| B. | Return loss |
| C. | Crosstalk |
| D. | All of the above |
9.
For certifying Cat 5e performance, installed cables are tested at frequencies up to __________.
| A. | 100 Mb/s |
|---|---|
| B. | 16, 20 and 100 MB/s |
| C. | 100 MHz |
| D. | 250 MHz |
10.
Voice grade unshielded twisted pair cables (UTP) which are only intended to carry POTS (plain old telephone service) only need testing for_____.
| A. | Shorts and opens |
|---|---|
| B. | Wiremap |
| C. | Crossed pairs |
| D. | Crosstalk |
11.
Below is the color code for _________________.
(Colors from left: 1-8: Blue stripe, Blue, Orange Stripe, Orange, Green Stripe, Green, Brown Stripe, Brown)
| A. | TIA 568A |
|---|---|
| B. | TIA 568B |
| C. | Punchdown blocks |
12.
Testers which “verify” cable performance test cabling by ________.
| A. | Sweeping frequencies |
|---|---|
| B. | Running network data and bit error rate tests on the cabling |
| C. | Testing at 500 MHz |
| D. | Time domain refractometry |
13.
Of the three copper testers, (wiremappers, certification and the new validation testers), which actually tests the cable for real networks like Ethernet?
| A. | Wiremapper |
|---|---|
| B. | Certification tester |
| C. | Validation tester |
| D. | None of them |