The Physical Layer - Slides Flashcards
What layer of the OSI model is the Physical layer?
Layer 1
What are the concerns of the physical layer?
Simplex
Half-Duplex
Full Duplex
What is a simplex?
A data connection that only works in one direction
What is a half-duplex?
A data connection that works in both directions, but only one direction at a time.
What is a full duplex?
A data connection that works both ways simultaneously.
What network media encoded bits through voltage?
Copper cables
What network media encodes bits through optic light levels?
Fiber-optic cables.
What is bandwidth?
The maximum rate that bits can be moved.
What is throughput?
The measurement of actual movement of bits through media.
What are the different media types?
Copper
Fiber-optic
Wireless/radio frequencies
What is a Twisted-Pair Cable (TCP)?
A cable with multiple pairs of wires where each pair is twisted separately.
How many pairs are in a networking cable?
4 pairs.
What are the types of Twisted Pair Cable?
Unshielded Twisted-Pair (UTP)
Shielded Twisted-Pair (STP)
What is the most common type of network cabling?
Unshielded Twisted-Pair (UTP)
What are the types of fiber optic cable?
Multimode (MM)
Single-mode (SM)
