02: You would like to transmit three numbers from one node to another node using digital communication medium. Each number you enter the keyboard has to be converted to digital bits ( i.e. ones and zeros). How many bits will be needed to store and send all three numbers;

A: 26

B: 16

C: 24

D: 8

03. Among the application services lists given below, which lists the services in order such that the desired throughput rates are increasing? A) transaction processing, still image transfers, voice, and large file transfers. B) large file transfers, voice, transaction processing, and still image transfers. C) transaction processing, voice, still image transfers, and large file transfers. D) voice, transaction processing, still image transfers, and large file transfers. E) Still image transfers, large file transfers, transaction processing, and voice. 04. The types of networks commonly used in businesses today include: A) Local area networks, wide-area networks, and telephone networks

B) Voice Mail Networks, Email Networks, Local Area Networks.

C) Wide Networks, Voice Mail Networks, Email Networks 05.__________ is similar to online chat because it is text-based bidirectionally in real time: A) Audio conferencing B) Instant messaging

C) Presence

D) Web conferencing 06. Digital signaling usually means that the information being conveyed is binary: A) True

B) False

07. Electromagnetic signals have been used to provide network connection to two nodes which are apart from each other. Electromagnetic signals____________ A) Are used for analog signals.

B) Are used only for optics.

C) Are used for digital signals only.

08. Analog signals differ from digital signals in that: A) analog signals are continuous while digital signals remain at one constant level and then move to another constant level

B) analog signals are periodic, digital signals are not.

C) analog signal operate at high frequency than digital signal. 09. Except for digital cellular telephones, fiber optic wire is required for digital transmission: A) True B) False 10) A carrier wave is modulated with 4 amplitudes changes; how many bits can be represented with each signal change? A) 3 B) 4 C) 2 D) 1

11) In modern wireless communication systems, data is sent from one point to another via: A) Input Data B) Pressure Changes

C) Electrical Signals

D) A/C 12) the internet grew out of a Department of Education project. A) True

B) False 13) we cannot send info (like a picture of cat) through the available communication channels, therefore, we convert the info into small data packages. Each packet includes a unique numeric address of the destination host, which is referred to as an __________ because the address is carried in an Internet Protocol packet. 14) The ________ is a global information system logically linked together by a globally unique address space based on the Internet Protocol or its subsequent extensions/follow-ons. 15) An ________ is a physical facility that provides the infrastructure to move data between connected networks. 16) The TCP/IP architecture contains ________ layers. A) 6 B) 4 C) 5 D) 3 18) ________ provides a secure remote logon capability, which enables a user at a terminal or personal computer to logon to a remote computer and function as if directly connected to that computer.