CHAPTER 12: Networks and Data Communications An Overview Flashcards
The sender and receiver end points, in a communications system, are referred to as
a) hosts.
b) end-users.
c) edge devices.
d) interface devices.
a) hosts.
Since data communication is predominantly serial, we usually describe the data as a
a) bit flow.
b) bit surge.
c) byte flow.
d) byte stream.
d) byte stream.
To solve the related problems of channel availability and maximum utilization, there must be a way to break long messages into smaller units. These units are called
a) boxes.
b) packets.
c) envelopes.
d) containers.
b) packets.
A _________is equivalent to an envelope containing pages of data.
a) packet
b) message
c) segment
d) container
a) packet
A direct USB connection between a smartphone and a personal computer is an example of
a) multicast.
b) broadcast.
c) one-to-many connection.
d) point-to-point connection.
d) point-to-point connection.
The typical communication channel is actually divided into segments; connections along the segments are called
a) links.
b) routes.
c) dedicated paths.
d) transmission paths.
a) links.
The rate of speed with which data can be moved successfully through the channel is usually measured as a
a) bit rate.
b) file rate.
c) block rate.
d) CPU cycle rate.
a) bit rate.
Which is not an example of an unguided medium?
a) microwave
b) cellular phone
c) broadcast radio
d) USB connection from computer to smartphone
d) USB connection from computer to smartphone
Some channel characteristics are determined innately by the medium. For example, unguided messaging must be carried by an analog signal known as a
a) shipping signal.
b) carrier signal.
c) delivery signal.
d) transport signal.
b) carrier signal.
Channels that carry messages in only one direction are known as
a) one-way channels.
b) simplex channels.
c) full duplex channels.
d) half-duplex channels.
b) simplex channels.
Channels that carry messages in both directions, but only one direction at a time, are called
a) simplex channels.
b) one-way channels.
c) full-duplex channels.
d) half-duplex channels.
d) half-duplex channels.
Channels that carry signals simultaneously in both directions are called
a) simplex channels.
b) one-way channels.
c) full-duplex channels.
d) half-duplex channels.
c) full-duplex channels.
A relatively small number of standard protocols, consisting primarily of the _____________ protocol suites, satisfy nearly all of the communication requirements for modern data communication networks.
a) TCP/IP and UDP
b) TCP/IP and BGP
c) TCP/IP and ATM
d) TCP/IP and Ethernet
d) TCP/IP and Ethernet
In a __________ topology each computer node gets every message, but processes only those addressed to that node. There is no central hub in this topology.
a) star
b) bus
c) ring
d) mesh
b) bus
Which of the following topologies is used primarily for local area networks; all nodes are connected point- to-point to a central device that uses switching technology to connect pairs of nodes together?
a) star
b) bus
c) ring
d) mesh
a) star