Chapter 3: Fiber-Optic Cables

Question 1

Which is faster, single-mode or multimode?

Answer 1

Single-mode.

Question 2

Which can achieve greater distances, single-mode or multimode?

Answer 2

Single-mode, it can cover 120 km. versus multimode which covers only 1 km.

Question 3

Which is cheaper single-mode or multimode?

Answer 3

Multimode.

Question 4

What is a Straight Tip (ST) fiber connector?

Answer 4

A bayonet-type connector that locks into the socket with a half-twist.

Question 5

What is a Subscriber Connector (SC)?

Answer 5

A push-pull connector with a key to prevent twisting in the socket.

Question 6

What is a Local Connector (LC)?

Answer 6

A small form-factor connector similar to the SC connector but approximately half the size.

Question 7

What is a Mechanical Transfer-Registered Jack (MT-RJ)?

Answer 7

A small form-factor connector with duplex cores that is similar in size to an RJ45 connector.

Question 8

What does Ultra-Physical Contact (UPC) mean?

Answer 8

The fiber core is polished to a zero-degree (flat) surface.

Question 9

What does Angled Physical Contact (APC) mean?

Answer 9

The fiber core is polished to an eight-degree angle so that reflected light is diverted to the cable cladding to reduce return loss.