Download 1- A well-structured document usually contains a number of clues

1- A well-structured document usually contains a number of clues about its contents. Skimming is
the practice of finding and using these clues. These are:
a. Visual clues such as a document’s title, headings; and verbal clues such as the
introduction and conclusion subheadings.
b. Visual clues such as introduction and conclusion subheadings
c. Verbal clues such as a document’s title, headings;
d. Both of b & c .
2- When you click the Print icon on your computer’s word-processor screen for print page , the
simple ICT consist of:
a.
b.
c.
d.
Communication link
Printer and computer.
User
All the above.
3- The works of the buffer :
a.
b.
c.
d.
For held the data in the printer before being processed.
For processing data
Both a & b
None of the above.
4- When two computers share the services of a printer, we need network for:
a. Routing.
b. Storing and manipulating data as it travels through the communication links.
c. Both a & b .
d. Extend the services
5- To convey data from one point to another we need to represent the data by means of
a. a signal.
b. Buffer
c. System map
d. Block diagram.
6- electromagnetic radiation is caused by
a. changes in electrical and magnetic fields.
b. changes in electrical and pulses of light fields.
c. changes in magnetic fields.
d. changes in electrical fields.
7- The wave oscillates regularly and repeatedly with time around its mean value. A single full
oscillation is known as
a. a wave cycle
b. time of signal
1
c. length of signal.
d. Distance from mean water level
8- Waveforms with a periodically repeating curve of this general shape are known as
a.
b.
c.
d.
Sinewaves.
Wave cycle
Frequency
Electromagnetic spectrum.
9- The unit for measuring frequency is
a.
b.
c.
d.
Hertz (Hz).
Bit pear second pbs
Byte
Kpbs
10- which of following numbers in scientific notation
a. 10000
3
b. 5 x10
4
c. 10
d. Both b &c
11- The process of modifying the carrier with the data is called
a. Demodulation
b. Modulation
c. Transmitter
d. Receiver
12- The time taken for a signal to travel from its source to its destination is known as
a. propagation delay.
b. Signal delay
c. Time receiving
d. Time transmitting
13- When a signal travels from one device to another it has some problems effected in called :
a.
b.
c.
d.
Attenuation
Distortion
Both a& b
None of the above
14- Node is a :
a.
b.
c.
d.
Computer
Printer
Server
All the above
2
15- Types of networks (according to shape):
a.
b.
c.
d.
Star and ring networks
WG. LAN and WAN
Star, Ring and Bus networks.
None of the above.
16- Types of networks (according to geographical spread):
a. Star and ring networks
b. LAN
c. WAN
d. Both b & c .
17- Each node in a network needs processes to control the flow of data over the network.
These processes are carried out by a :
a.
b.
c.
d.
network interface card (NIC)
LAN
Router
Buffer
18- MAC stands for
a.
b.
c.
d.
Media Access Control
Maximum Access Control
Minimum Access Control
Maximum Allowed Control
19- ________________a device will examine each frame as it arrives and read the destination
MAC address to establish whether or not to pass the frame onto an adjacent segment.
a.
b.
c.
d.
Switch or bridge
Multiplexer
Repeater
Both b & c
20- The term often used to describe devices connected to a wired network is
a.
b.
c.
d.
Node
MAC
Bandwidth
Mesh
22- Estimate how many times faster the data rate of the original Ethernet standard (10
Mbps) is, compared to the data rate of a modern standard dial-up modem of 56 kbps.
(Hint: round down the dial-up modem rate to 50 kbps.)
a.
b.
c.
d.
300
3
200
0
3
23- Calculate the duty cycle of a device that typically connects to a network and transmits
for 10 ms in every 0.5 s.
a.
b.
c.
d.
20%
3%
2%
0%
21- The dominant standard in wired LANs is one that is commonly known as
a.
b.
c.
d.
Ethernet.
Bus topology
Token topology
None the above
Part 2
1- The abstract is usually presented after the main text (F)
2- When use the communication link is point-to-point so there is no requirement for network
routing. (T)
3- an electrical voltage traveling along copper wires between your
telephone and the local exchange;(T)
4- pulses of light traveling along copper wires (F)
5- The frequency of the wave is the number of wave cycles it completes in a single
second.(T)
6- The term electromagnetic spectrum refer to entire refers of frequencies of
electromagnetic waves (T)
7- a receiver takes the signal, and extracts the data by a process known as modulation (T)
8- transceivers, perform both the sending and receiving of signals (T)
9- (WANs) connect together two or more LANs that are geographically separated. (T)
10-Messages between nodes are sent in one continuous stream and no need to broken up into
small chunks called frames (F)
11- A repeater increases the practical distance between nodes (T)
12- In a Bus topology each node has its own cabled link to a central point called a hub.(F)
13- In a full mesh topology each node has a point-to-point link with every other node. (T)
4
14- Router generally works at the edge of a LAN rather than within it. (T)
5
ANSWER FOR PART MCQ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
A
D
A
C
A
A
A
A
A
D
B
A
C
D
C
D
A
A
A
A
A
ANSWER FOR F AND T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
F
T
T
F
T
T
T
T
T
F
T
F
T
T
6