2.1.2 -- Twisted Pair Facts

Question 1

Advantages of twisted pair cabling

Answer 1

• Flexibility
• Cost
• Ease of use
• Work with newer protocols

Question 2

Disadvantages of twisted pair

Answer 2

• Susceptible to interference

* Susceptible to eavesdropping

Question 3

PLENUM cable

Answer 3

• Plenum rated non-toxic when burned
• Plenum must be used in plenum spaces
• Can be used in RISER spaces
• Plenum space is a part of a building that provides a pathway for he airflow needed by heating and ac systems such as above a dropped ceiling or below a raised floor.

Question 4

RISER Cables

Answer 4

• Designed for installation that run between floors.

* NEVER 2 be used in plenum spaces

Question 5

Twisted Pair (SOLID)

Answer 5

• Solid wires conduct electrical signals better but prone to break when they are repeatedly bent
• Use solid cable in permanent and semi-permanent installations

Question 6

Twisted Pair (Stranded)

Answer 6

• More flexible, but doesn’t carry signals as well

* Use stranded cable for patch cords and when cables are frequently moved

Question 7

Phone Cable

RJ11

Answer 7

• A phone cable is used to connect a PC to a phone jack in a wall outlet to establish a dial up internet connection.
• Total of 4 wires

Question 8

Cat

RJ45

Answer 8

• Designed for use with 10-megabit Ethernet (10BASE-T) or 16-megabit token ring.

Question 9

Cat 5

RJ45

Answer 9

• Supports 100-megabit Ethernet (100BASE-TX) and ATM networking.
• Can support gigabit (1000 Mb) Ethernet

Question 10

Cat 5e

RJ45

Answer 10

• Similar to Cat 5 but provides better EMI protection

* Supports 100-megabit (100BASE-T) and gigabit (1000BASE-T) Ethernet

Question 11

Cat 6

RJ45

Answer 11

• Supports 10-Gbps Ethernet (10GBASE-T) and high-bandwidth communications
• In most cases provides solid plastic core that keeps the twisted pairs separate and prevents the cable from being bent too tightly

Question 12

Cat 6a

RJ45

Answer 12

• Is designed to provide better protection against EMI and crosstalk than Cat 6.
• Provides better performance especially when used with 10-Gbps Ethernet (10-GBASE-T)

Question 13

RJ11

Answer 13

• Has 4 connectors
• Supports up to 2 pair of wires
• Uses a locking tab to keep the connector secure in an outlet
• Used primarily for telephone wiring

Question 14

RJ45

Answer 14

• Has 8 connectors
• Supports up to 4 pairs of wires
• Uses a locking tab to keep the connector secure in an outlet
• Used for Ethernet and some token ring connections

Question 15

GG45

Answer 15

• Has 8 connectors
• Supports 4 pairs of wires
• Backwards compatible with RJ45
• 4 additional connector that duplicate and replace the 4 inner pins on the JR45

Question 16

TERA

Answer 16

• Has 8 connectors
• Supports 4 pairs of wires
• Incompatible with RJ45 and GG45
• Does not require special tools to install.