CompTIA Network+ N10-006 - 1.5

Question 1

The importance of cable

Answer 1

• Fundamental to network communication
–Incredibly important foundation

• Usually only get one good opportunity at architecting your cabling infrastructure
–Make it good!

•The vast majority of wireless communication uses cables
– Unless you’re an amateur radio operator!

Question 2

Twisted pair copper cabling

Answer 2

•Balanced pair operation
–Two wires with equal and opposite signals
• Transmit+, Transmit- / Receive+, Receive-

•The twist is the secret!
– Keeps a single wire constantly moving away from the interference
– The opposite signals are compared on the other end

•Pairs in the same cable have different twist rates

Question 3

Unshielded and shielded cable

Answer 3

• UTP (Unshielded Twisted Pair)
–No additional shielding
– The most common twisted pair cabling
* We have these in the data center

• STP (Shielded Twisted Pair)
–Additional shielding protects against interference
– Requires the use of an electrical ground

Question 4

Network cabling standards

Answer 4

• Electronic Industries Alliance (EIA)
 – Alliance of trade associations
 –Develops standards for the industry
    •Standards start with RS-# (recommended Standard) or EIA-#
 – http://www.eia.org

• Telecommunications Industry Association (TIA)
–Standards, market analysis, trade shows, government affairs, etc.
–ANSI/TÍA/EIA-568
•Commercial Building Telecommunications Cabling Standard
–http://www.tiaonline.org

Question 5

Copper cable categories

Answer 5

Review it and paste image here.

NEED TO KNOW

5e, 6, 6A

Category 5e = 100BASE-TX, 1000BASE-T; up to 100 meters

Categories 6 = 10GBASE-T; up to 37 to 55 meters

Category 6A = 10GBASE-T, up to 100 meters

Question 6

No plenum

Answer 6

Health and safety codes

Question 7

Plenum-rated cable

Answer 7

• Cable jacket
–Fluorinated ethylene polymer (FEP) with low-smoke Polyvinyl chloride (PVC)

• Plenum-rated cable may not be as flexible
–May not have the same bend radius

•Worst-case planning
–Important concerns for any structure

Question 8

Coaxial cables

Answer 8

• Two or more forms share a common axis

• RG-6 used in television/digital cable
–And high-speed Internet over cable

• RG-59 used as patch cables
– Not designed for long distances

Question 9

Wiring standards

Answer 9

• Cables can could up a perfectly good plan
– Test your cables prior to implementation

• Many connectors look alike
–Do you have a good cable mapping device?

• Get a good cable person
–It’s an art

Question 10

568A and 568B termination

Answer 10

• Pin assignments in EIA/TIA-568-B

– Eight conductor 100-ohm balanced twisted-pair cabling