TRB-CS-VIP ONLINE COACHING CENTER ( Test-3) *Computer Networks*

Computer Networking-3

Quiz

 

1. Which of the following summation operations is performed on the bits to check an error-detecting code?
   1.   Codec
   2.   Checksum
   3.   Attenuation
   4.   Coder-decoder
2. Select the correct statement about broadband and baseband.
   1.   Baseband refers to local area networks, and broadband refers to wide area networks.
   2.   Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
   3.   Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
   4.   Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
3. An error-detecting code inserted as a field in a block of data to be transmitted is known as
   1.   Checksum
   2.   flow control
   3.   Error detecting code
   4.   Frame check sequence
4. The cheapest modems can transmit
   1.   100 bits per second
   2.   300 bits per second
   3.   600 bits per second
   4.   900 bits per second
5. Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answe
   1.   OSI
   2.   Network Server
   3.   Virtual Private Network
   4.   Network operating system
6. Error rate is
   
   1.   the ratio of the number of data units in error to the total number of data units
   2.   a check bit appended to an array of binary digits to make the sum of all the binary digits
   3.   an error-detecting code based on a summation operation performed on the bits to be checked
   4.   a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors is detected
7. Which address is the loopback address?
   1.   0.0.0.1
   2.   125.0.0.0
   3.   127.0.0.1
   4.   255.255.255.255
8. If a firm wanted to transmit data from 1,000 punched cards to a remote computer, they would use a(n)
   1.   POS termina
   2.   intelligent terminal
   3.   data collection terminal
   4.   batch processing terminal
9. . Which network topology is considered passive?
   1.   Bus
   2.   Star
   3.   Ring
   4.   Cross
10. Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device
    1.   Modem
    2.   Interface
    3.   Attenuation
    4.   Teleprocessor
11. What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?
    1.   4
    2.   9
    3.   12
    4.   15
12. The receive equalizer reduces delay distortions using a
    1.   gearshift
    2.   descrambler
    3.   difference engine
    4.   tapped delay lines
13. Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologie
    1.   12
    2.   48
    3.   88
    4.   729
14. A network consists of eight NT servers. You are planning to move servers to different segments of your network, what utility should be used at each server to determine which server generates the most
    1.   ARP.EXE
    2.   NETSTAT.EXE
    3.   Network Monitor
    4.   Performance Monitor
15. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is
    1.   form filling
    2.   menu selection
    3.   question and answer
    4.   open-ended question
16. Error detection at a data link level is achieved by
    1.   bit stuffing
    2.   equalization
    3.   Hamming codes
    4.   cyclic redundancy codes
17. If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is
    1.   1200 bands
    2.   2800 bands
    3.   3200 bands
    4.   4400 bands
18. A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as
    
    1.   bridges
    2.   User Agent
    3.   Gateways
    4.   mail gateway
19. Sending a file from your personal computer's primary memory or disk to another computer is called
    1.   hang on
    2.   uploading
    3.   logging on
    4.   downloading
20. What is the name of the software package that allows people to send electronic mail along a network of computers and workstations?
    1.   Electronic mail package
    2.   Memory resident package
    3.   Project management package
    4.   Data communication package
21. The communication mode that supports two-way traffic but only one direction at a time is
    1.   simplex
    2.   duplex
    3.   half duplex
    4.   multiplex
22. HMP (Host Monitoring Protocol) is:
    1.   a protocol used to monitor computers
    2.   a protocol that handles error and control messages
    3.   a TCP/IP high level protocol for transferring files from one machine to another
    4.   a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
23. Which of the following is a voice band channel?
    1.   Coaxial cable
    2.   Telephone line
    3.   Telegraph line
    4.   Microwave systems
24. You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and 192.168.7.0. What subnet mask can you use to combine these addresses into one?
    1.   255.255.252.0
    2.   225.255.254.0
    3.   255.255.255.240
    4.   255.255.255.252
25. Which of the following technique is used for encapsulation?
    1.   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
    2.   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
    3.   a technique used in best-effort delivery systems to avoid endlessly looping packets
    4.   all of the above