Computer Science Networking MCQs - Set 15 - ObjectiveBooks

Computer Science Networking MCQs - Set 15

Practice Test: Question Set - 15

1. The core diameter of a single-mode fibers is about
    (A) 10 times the wavelength of the light carried in the fiber
    (B) 10 times the fiber radius
    (C) 7 times the light carried in the fiber
    (D) 3 times the wavelength of the light carried in the fiber

2. Which of the following technique is used for fragment?
    (A) A technique used in best-effort delivery systems to avoid endlessly looping packets
    (B) A technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame
    (C) One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
    (D) All of the above

3. Which of the following file retrieval methods use hypermedia?
    (A) HTTP
    (B) WAIS
    (C) Veronica
    (D) Archie

4. In communication satellite, multiple repeaters are known as
    (A) Detector 
    (B) Modulator
    (C) Stations
    (D) Transponders

5. Which of the following TCP/IP protocol allows an application program on one machine to send a datagram to an application program on another machine?
    (A) UDP
    (B) VMTP
    (C) X.25
    (D) SMTP

6. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?
    (A) Recognized standard
    (B) Random sequence
    (C) Recommended standard
    (D) Registered source

7. What frequency range is used for TV transmission and low power microwave applications?
    (A) Very Low Frequency : 3 kHz to 30 kHz
    (B) Medium Frequency : 300 kHz to 3 MHz
    (C) Ultra High Frequency : 300 MHz to 3000 MHz
    (D) Super High Frequency : 3000 MHz to 30000 MHz

8. In CRC there is no error if the remainder at the receiver is _______.
    (A) Equal to the remainder at the sender
    (B) Zero
    (C) Nonzero
    (D) The quotient at the sender

9. What protocol is used between E-Mail servers?
    (A) FTP
    (B) SMTP
    (C) SNMP
    (D) POP3

10. When two computers communicate with each other, they send information back and forth. If they are separated by a reasonable distance, they can send and receive the information through a direct cable connection which is called a null-modem connection. Presently what is the maximum distance in meters permitted in this null-modem connection?
    (A) 80
    (B) 100
    (C) 30
    (D) 150

11. With an IP address of 100, you currently have 80 subnets. What subnet mask should you use to maximize the number of available hosts?
    (A) 192
    (B) 224
    (C) 240
    (D) 252

12. Communication between computers is almost always
    (A) Serial
    (B) Parallel
    (C) Series parallel
    (D) Direct

13. Which transmission mode is used for data communication along telephone lines?
    (A) Parallel 
    (B) Serial
    (C) Synchronous
    (D) Asynchronous

14. The packets switching concept was first proposed
    (A) In the late 1980s for the Defense Ministry of US
    (B) In the early 1960s for military communication systems, mainly to handle speech
    (C) In the late 1950s for Defense Ministry of US
    (D) All of the above

15. Which of the following performs modulation and demodulation?
    (A) Fiber optic
    (B) Satellite
    (C) Coaxial cable
    (D) Modem

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