Chapter 1

Question 1

Components of data communication

Answer 1

Message, sender, receiver, medium, protocol

Question 2

Simplex

Answer 2

Data only travels in singular direction

Question 3

Half-Duplex

Answer 3

Data travels in both directions, but only one way at a time

Question 4

Full-Duplex

Answer 4

Data can travel both ways simultaneously

Question 5

Network criteria in data communication

Answer 5

Performance, Reliability, security

Question 6

Point to point

Answer 6

Communication between only 2 devices

Question 7

Multipoint

Answer 7

Communication between more than 2 devices or nodes

Question 8

Mesh topology

Answer 8

Every node is connected to all ofther nodes

Question 9

Star topology

Answer 9

All network nodes connected to common central computer

Question 10

Bus topology

Answer 10

All nodes connected to cable (bus) that acts as backbone

Question 11

Ring topology

Answer 11

Nodes are connected to eachother in ring format
each node connected to exactly 2 other nodes

Question 12

Hybrid topology

Answer 12

Uses 2 or more different network topologies

Question 13

Types of computer networks

Answer 13

PAN, LAN, MAN, WAN

Question 14

PAN

Answer 14

Personal area network
single user personal devices in limited area

Question 15

LAN

Answer 15

Local area network
Group of computers in limited area like school, home or workplace

Question 16

MAN

Answer 16

Metropolitan area network
Network across city, college, campus, small region

Question 17

WAN

Answer 17

Wide area network, Large geographical area ie: the internet

Question 18

Switching

Answer 18

decide best route for data transmission
used to connect systems, one to one

Question 19

Circuit switching

Answer 19

dedicated path between sender and receiver
connection is always established first
connection terminated
ex: telephone

Question 20

Message switching

Answer 20

Store and forward
Message transferred as complete unit
not suitable for real time applications like streaming

Question 21

Packet switching

Answer 21

Broken into individual chunks called packets
Packets send individually
Packets contain source and destination IP w/ sequence #
Sequence # helps reorder and detect missing packets
Internet uses packet switching

Question 22

Protocol

Answer 22

Set of rules
determines what and how things are communicated
Using syntax, semantics (meaning of bits), timing (when, speed)