Networking Exam 2 Ch 5.1

Front 1

What is the physical layer?

Back 1

The only layer that does not deal with messages; individual bits are converted directly into
signals.
◦ It alone deals with signals, transmission media,
and connectors.
◦ It alone deals with propagation effects—changes
in signals as they propagate.

Front 2

signal

Back 2

a ______ is a disturbance that propagates down a transmission medium to the other side, which reads it

Front 3

propagation

Back 3

the traveling of a signal down a transmission medium

Front 4

attenuation

Back 4

propagation effect (change in signal during propagation); signal has been weakened and distorted; can cause receiver to not interpret signal correctly

Front 5

analog signaling

Back 5

the signal rises and falls smoothly in intensity; small propagation errors are not fixed.

Front 6

binary signals

Back 6

there are two states per clock cycle; small propagation effects do not create errors in reading the signal; most transmission is this

Front 7

digital signals

Back 7

there are a few states per clock cycle - 2, 4, 8, 16, 32, and so on
- Can transmit multiple bits per clock cycle

- Less error immunity to propagation errors than
in binary transmission

Front 8

UTP (Unshielded Twisted Pair – Copper Wiring); 4-Pair UTP cable

Back 8

Ethernet LANs typically use _________ wiring to connect users to nearest switch

Front 9

cord

Back 9

A length of UTP wiring is a ___________

Front 10

wires

Back 10

Each cord has eight copper ________ covered with dielectric (nonconducting) insulation.