Cabling/Connectivity

Question 1

Cable Types

List the copper cable standards.

Answer 1

10base-T
10base-2
10base-5

Question 2

Cable Types

What does 10base-T feature?

Answer 2

Twisted pair cable.

Maximum length of 100m.

RJ-45 Connectors.

Operates at 10 Mb/s.

Uses Baseband transmission.

Question 3

Cable Types

The two types of Fibre Optics are?

Answer 3

Singlemode and Multimode.

Question 4

Cable Types

What is Singlemode Fiber Optics used for?

Answer 4

Long distance transmissions.

Singlemode utilises one fibre strand for one ray of light to transfer data.

Question 5

Cable Types

What is Multimode transmission used for?

Answer 5

Short distance transmissions.

In multimode light rays tracel across multiple glass fibre strands.

Question 6

Connectors

What are rhe differences between RJ-45 and RJ-11?

Answer 6

RJ-45 is an 8 pin connector used for ethernet cables while RJ-11is a 6 pin connector used in telephone lines.

Question 7

Legacy Connectors

What was a Serial cable used for?

Answer 7

Connecting modems, terminals and various peripherals.

It, as you might have guessed, primarily handled data transfer

Question 8

Legacy Connectors

What were Parrallel ports used for?

Answer 8

Used for various peripherals to connect to a PC.

Question 9

Fibre Connectors

ST Connector (auto turn over)

Answer 9

Used a half-twist bayonet tupe connector

Question 10

Fibre Connectors

SC type connector (auto turn over)

Answer 10

A push/pull connector. Similar to Digital Audio cables.

Question 11

Fibre Connectors

LC Connector (auto turn over)

Answer 11

Uses a flange on top, similar to an RJ-45 Ethernet (CAT 6).

Question 12

Fibre Connectors

MT-RJ type connector (auto turn over)

Answer 12

A small unusually two pronged connector. Due to it’s size it is commonly found in small form factor devices.

Question 13

Ethernet Catagories

Name the Catagories for ethernet cabling.

Answer 13

CAT1
CAT2
CAT3
CAT4
CAT5
CAT5e
CAT6
CAT6a
CAT7

Question 14

Ethernet Catagories

CAT1 cables are generally used for which purpose?

Answer 14

Telephonw wire

Question 15

Ethernet Catagories

What CATagory is the most common today?

Why?

Answer 15

CAT5e

It is cheap, readily available and handles 1Gb transfer speeds/data rate. Most moderm devices come with 1Gb NICs as standard.

Question 16

Ethernet Catagories

List the details of CAT6 and CAT6a

Answer 16

CAT6:
10Gb/s over 55m

CAT6a:
Has better immunisation and crosstalk prevention than base 6

Both:
Requires all equiptment down the line to be CAT6 certified.
Weariness that cables are properly terminated.
Testing can be arranged to ensure installs are done as per the CAT6 guidelines.

Question 17

Antennas

Explain Omni vs Directional antennas.

Answer 17

Omni antennas send data over a shorter distances but in every direction. They tend to look like a ‘stick’

Directional antennas tend to have a ‘shield’ behind them that help focus incoming and outgoing transmissions, resulting in further but directed transmissions.

Question 18

Antennas

Explain Point to Point communication

Answer 18

This is where there is only two devices sending/receiving to each other.

Question 19

Antennas

Explain Multipoint Communication.

Answer 19

This is where the communcation link is between multiple senders and receivers.

Question 20

Wireless Types:

What is Bluetooth? Explain.

Answer 20

A short range radio wireless technology. This is low power and connects devices, generally for data transfer. Great for low battery devices.

It has a range of <100m.

Class one <100m
Class two <10m (Most Common Class)
Class three <1m

Question 21

Crosstalk

Alien Cross Talk vs Crosstalk

Answer 21

ATX is when one cable interferes with another seperate cable

Crosstalk is when one circuit interferes with another circuit in the same system

Question 22

Crosstalk

Near End Cross Talk is?

Answer 22

The crosstalk occuring nearest to the transmitter.

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Question 23

Crosstalk

Far End Cross Talk is?

Answer 23

When cross talk occurs near to the reciever.

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