2.4.1 Fiber Optic Cable

Question 1

Distribution Frame (Patch Panel):

Answer 1

Definition: A passive hardware assembly used to terminate network cables, allowing for easy connection and re-routing of circuits via patch cords. Provides organization, flexibility, and simplified troubleshooting. Network+ focuses on the practical benefits.

Question 2

2. Duplex Fiber:

Answer 2

Definition: A fiber optic communication method that uses two strands: one for transmitting (Tx) data and one for receiving (Rx) data.

Question 3

3. Fiber Optic Polarity (A to B):

Answer 3

Definition: The correct alignment of Tx and Rx connections in a fiber link. Requires an odd number of crossovers to ensure proper communication. Mismatched polarity leads to no signal.

Question 4

UPC (Ultra Physical Contact)

Answer 4

Fiber connector finish with a polished, slightly curved surface. Blue connector (typically).

Question 5

APC (Angled Physical Contact):

Answer 5

Fiber connector finish with an angled polish for tighter connection and reduced back reflection. Green connector (typically). Important: Do not mix UPC and APC connectors. Network+ expects you to know they’re incompatible.

Question 6

5. Single-Mode Fiber (SMF) vs. Multimode Fiber (MMF):

Answer 6

SMF Definition: Fiber optic cable designed for long-distance communication and higher bandwidth. Yellow jacket.

MMF Definition: Fiber optic cable generally used for shorter distances. Orange or Aqua jacket. (Know the OM1/OM2/OM3/OM4 variations are multimode). Network+ level understanding does not usually require deep dives into the different multimode types beyond their color codes.

Question 7

Multi Fiber Connector

Answer 7

Connector connecting multiple optical fibers simultaneously.