ITN 101 2C Quiz Review

What is one advantage of using fiber-optic cable in networks?

• It is inexpensive.

• It is an industry standard and is available at any electronics store.

• It is easy to install.

• It is capable of higher data rates than either coaxial or twisted-pair cable.

What type of cabling has better security for networks?

• STP

• UTP

• Fiber Optic

• Coaxial

Which of the following cables can run many kilometers without attenuation?

• SMF

• MMF

• UTP

• STP

Which of the following are fiber optic cables?

• 
• 
• 
• 

Which of the following are fiber optic connector types?

• ST

• SC

• LC

• LT

What type of cables consist of a core of glass or plastic which carries the signal?

• Fiber Optic

• UTP

• STP

• Coaxial

Fiber optic cables consist of very fine strands of glass or plastic fiber; transmitting data via what?

• magnetic pulses

• infrared light pulses

• electricity

• sound waves

A project manager is reviewing which type of cabling to use for an upcoming project. Which of the following is NOT a benefit of using fiber optic cabling?

• Bandwidth

• Cost

• Interference

• Attenuation

Answer explanation

Fiber optic cabling costs more than copper cabling. This is the main downside for organizations, as most organizations tend to go with the lowest cost options to support operations.

Fiber optic cabling supports higher bandwidth over longer cable runs (measured in kilometers rather than meters).

The electrical signals carried over the copper wire are subject to interference. Fiber optic signaling uses pulses of infrared light, which are not susceptible to interference.

The electrical signals carried over copper wire are also subject to attenuation. Fiber optic signaling uses pulses of infrared light, which suffer less from attenuation.

A technician who lays cabling is researching how the manufacturer constructed fiber optic cabling. Which of the following reflects signals back into the waveguide as efficiently as possible so that the light signal travels along the waveguide by multiple internal reflections?

• Riser

• Core

• Buffer

• Cladding

Answer explanation

Cladding reflects signals back into the waveguide as efficiently as possible so that the light signal travels along the waveguide by multiple internal reflections.

Riser cabling (in conduit or spaces such as lift shafts) should also conform to the appropriate fire safety standards. These are similar to the requirements for plenum spaces but not quite as strict.

Core provides the transmission path for the light signals (waveguide).

Buffer is a protective plastic coating. It may be of a tight or loose configuration, with the loose format using some form of lubricant between the strand and the sheath.

A network administrator is setting up cabling between buildings and needs to transmit the maximum distance possible. Which type of cabling would be most suitable?

• MMF

• SMF

• Twisted Pair

• Coaxial

Answer explanation

Single Mode (SMF) fiber optic cable supports higher bandwidth over longer links than copper cable. Single mode allows for longer distance transmission than MultiMode.

MultiMode (MMF) fiber optic cable also supports higher bandwidth over longer links than copper cable. However, single mode would allow longer distances.

Twisted pair is a type of copper cable that suffers from high attenuation, meaning that the signal quickly loses strength over long links.

Coaxial is also a type of copper cable that suffers from high attenuation, meaning that the signal quickly loses strength over long links.