TRB-CS-VIP ONLINE COACHING CENTER ( Test-5) *Computer Networks*

TRB-CS-VIP ONLINE COACHING CENTER ( Test-5) *Computer Networks*

TRB-CS-VIP ONLINE COACHING CENTER ( Test-5) *Computer Networks*

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

TRB-CS-VIP ONLINE COACHING CENTER ( Test-4) *Computer Networks*

Computer Networking--4

Quiz

 

1. On a class B network, how many hosts are available at each site with a subnet mask of 248?
   1.   2,046
   2.   4,094
   3.   8,190
   4.   16,382
2. What are the data transmission channels available for carrying data from one location to another?
   1.   Voiceband
   2.   Broadband
   3.   Narrowband
   4.   All of the above
3. Devices interconnected by the LAN should include
   1.   mass storage device, printers and plotters
   2.   computers and terminals
   3.   bridges and gateways
   4.   all of the above
4. A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?
   1.   8,000 B frame
   2.   10,000 B frame
   3.   50,000 B frame
   4.   80,000 B frame
5. Data are sent over pin _____ of the EIA-232 interface.
   1.   1
   2.   2
   3.   3
   4.   4
6. To connect a computer with a device in the same room, you might be likely to use
   1.   a coaxial cable
   2.   a dedicated line
   3.   a ground station
   4.   all of the above
7. Demodulation is a process of
   1.   performing data description
   2.   converting analog to digital signals
   3.   converting digital to analog signals
   4.   multiplexing various signals into one high speed line signals
8. Internet-like networks between a company and its business partners. Select the best fit for answer:
   1.   Extranets
   2.   Switching alternating
   3.   Bandwidth alternatives
   4.   Inter organizational networks
9. Modulation is the process of
   1.   performing data encryption
   2.   converting digital signals to analog signals
   3.   converting analog signals to digital signals
   4.   multiplexing various signals into high speed line signals
10. Which of the following best illustrates the default subnet mask for a class A,B, and C Network?
    1.   0.0.0.0, 0.0.0.1, 0.0.1.1
    2.   255.255.255.0, 255.255.0.0, 255.0.0.0
    3.   255.0.0.0, 255.255.0.0, 255.255.255.0
    4.   255.255.0.0, 255.255.255.0, 255.255.255.255
11. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?
    1.   255.255.255.192
    2.   255.255.255.200
    3.   255.255.255.240
    4.   255.255.255.252
12. Which of the following statement is incorrect?
    1.   The sender's IP - to- physical address binding is included in every ARP broadcast; receivers update the IP-to-Physical address binding information in their cache before processing an ARP packet.
    2.   The Addresses Resolution Protocol, ARP, allows a host to find the physical address of a target host on the same physical network, given only the target IP address.
    3.   ARP is a low-level protocol that hides the underlying network physical addressing, permitting us to assign IP-addresses of our choice to every machine.
    4.   All of the above
13. Demodulation is the process of
    1.   converting digital signals to analog signals
    2.   converting analog signals to digital signals
    3.   dividing the high-speed signals into frequency bands
    4.   combining many low speed channels into one high speed channel
14. An example of an analog communication method is
    1.   voice grade telephone line
    2.   laser beam
    3.   microwave
    4.   all of the above
15. Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing, file transfer and network management?
    1.   Layer 2 protocols
    2.   Layer 5 protocols
    3.   Layer 7 protocols
    4.   Layer 10 protocols
16. What frequency range is used for FM radio transmission?
    1.   Very Low Frequency : 3 kHz to 30. kHz
    2.   Low Frequency : 30 kHz to 300 kHz
    3.   High Frequency : 3 MHz to 30 MHz
    4.   Very High Frequency : 30 MHz to 300 MHz
17. Transmission of computerised data from one location to another is called
    1.   data flow
    2.   data transfer
    3.   data management
    4.   data communication
18. Compared to analog signals, digital signals
    1.   are more accurate
    2.   allow faster transmission
    3.   both (a) and (b)
    4.   all of the above
19. HOSTS file entries are limited to how many characters?
    1.   32
    2.   255
    3.   926
    4.   Unlimited
20. If delays are recorded as 10 bit numbers in a 50 router network, and delay vectors are exchanged twice a second, how much bandwidth per fill duplex line is occupied by the distributed routing algorith
    1.   5 bps
    2.   500 bps
    3.   1000 bps
    4.   1500 bps
21. A central computer surrounded by one or more satellite computers is called a
    1.   bus network
    2.   star network
    3.   ring network
    4.   all of the above
22. An anticipated result from multi programming operations is:
    1.   better scheduling of work
    2.   the handling of more jobs
    3.   reduced computer idle time
    4.   all of the above
23. FDDI is a
    1.   ring network
    2.   mesh network
    3.   bus based network
    4.   none of the above
24. Modem is used in data transmission. When was it invented and in which country?
    1.   1950, USA
    2.   1963, USA
    3.   1950, Japan
    4.   1965, Germany
25. Which of the following technique is used for Time-To-Line (TTL)?
    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 system to avoid endlessly looping packets.
    4.   all of the above