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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