Bits across the Wire

Question 1

: What layer is
‘moving ones and zeroes from one end of the link to the next’ the main focus of?

Answer 1

Main focus of physical layer

Question 2

What layer consists of: devices and means of transmitting bits across networks.

Answer 2

Physical

Question 3

The smallest representation of data a computer can understand. A one or a zero.

Answer 3

Bit

Question 4

groups of ones and zeros sent across networks at the lowest level. No matter what you are doing online, you are sending these.

Answer 4

frames and packets of data

Question 5

a way of varying the voltage of a charge moving across a cable.

Answer 5

Modulation:

Question 6

Cabling constantly carries

Answer 6

an electrical charge.

Question 7

line coding. Allows devices on either end of the link to let network devices know that a certain charge is a zero or a one.

Answer 7

modulation for computer networks

Question 8

Speed of modern networking:

Answer 8

10 billion bits/s

Question 9

The most common type of cabling

Answer 9

twisted pair cable

Question 10

the most common type of cabling for connecting computing devices. Features pairs of copper wires twisted together.

Answer 10

Twisted pair cable

Question 11

. Most common. act as a single conduit for information.

Answer 11

copper pairs

Question 12

8 wires, consisting of four twisted pairs, inside a single jacket.

Answer 12

Standard Cat6 cable, Cat cable.

Question 13

What depends on the transmission technology being used. Modern ones allow for duplex comm.

Answer 13

Pairs in use

Question 14

the concept that information can flow in both directions across the cable.

Answer 14

duplex communication

Question 15

Simplex communication

Answer 15

Unidirectional process of transmitting information.

Question 16

What is possible when wiring Reserves one or two pairs for communication in one direction, and reserves the other one or two pairs for communicating in the other direction.

Answer 16

duplex communication

Question 17

devices on either side of a networking link can communicate with each other at the exact same time.

Answer 17

Full duplex:

Question 18

what can a connection degrade to?

Answer 18

connection can degrade to half duplex.

Question 19

while the devices can communicate in either direction, only one device can communicate at a time.

Answer 19

half duplex

Question 20

coaxial cable is an example of

Answer 20

twisted pair cable

Question 21

can also supply telephone and television services:

Answer 21

ethernet over twisted pair technologies, cable.

Question 22

What is delivered by this: coaxial cable or fiber optic cable from an internet service provider, ISP. Connection is fed to a gateway modem located inside the building or home, often provided by ISP. Modem then passes the connection through a twisted pair ethernet cable to a router or a single computer. Router uses twisted pair ethernet cables to distribute wired network connections internally to business or home.

Answer 22

How an internet connection to a building or home is normally delivered

Question 23

two copper wires. One for transmitting and the other for receiving data, laid parallel to each other.

Answer 23

original telephone and early data cables:

Question 24

old wires affected by:

Answer 24

EMI, Radio frequency interference, cross talk.