1. An __________ signal is a continuously varying signal that can assume a continuous
range of values.
a. digital
b. analog
c. voice
d. image
2. __________ is a telephone company offering which provides switching services to
subscribers via equipment located in the central office.
a. ATM
b. Internet
c. Centrex
d. ISDN
3. A __________ is the smallest element of a digital image that can be assigned a grey
scale.
a. pixel
b. bit
c. nibble
d. byte
4. __________ response time is the time span between the moment a user receives a
complete reply to one command and enters the reply.
a. user
b. system
c. network
5. __________ response time is the time span between the moment the user enters a
command and the moment a complete response is displayed on the associated
terminal.
a. network
b. system
c. device
d. user
6. __________ is the time it takes a system to respond to or react to a given input.
a. response time
b. propogation delay
c. system utilization
7. __________ service supports the communication of individual pictures, charts, fax,
CAD and publishing.
a. multimedia
b. interactive
c. video
d. image
8. In order to get a good representation of sound in digital format, the amplitude must be
sampled at a rate equal to at least __________ the maximum frequency (in hertz) of
the analog signal.
a. twice
b. four
c. five
d. three
9. Symbols are often grouped in __________ or bytes for manipulation within a
computer system or transmission over a network.
a. double words
b. 16 bits
c. octets