MCQOPTIONS
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MCQOPTIONS
This section includes 415 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
The transmission signal coding method of TI carrier is called |
| A. | Bipolar |
| B. | NRZ |
| C. | Manchester |
| D. | Binary |
| Answer» B. NRZ | |
| 352. |
Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What is the maximum number of repeaters that can be used? |
| A. | Five |
| B. | Two |
| C. | Four |
| D. | Six |
| Answer» D. Six | |
| 353. |
Which of the following program is used to copy files to or from another UNIX timesharing system over a single link? |
| A. | VMTP |
| B. | TFTP |
| C. | UUCP |
| D. | UART |
| Answer» D. UART | |
| 354. |
In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and |
| A. | PC |
| B. | synchronous port |
| C. | crossover cable |
| D. | asynchronous port |
| Answer» E. | |
| 355. |
A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate? |
| A. | 3 Kbps |
| B. | 6 Kbps |
| C. | 12 Kbps |
| D. | 24 Kbps. |
| Answer» C. 12 Kbps | |
| 356. |
Internet-like networks within an enterprise. |
| A. | Intranets |
| B. | Switching alternating |
| C. | Inter organizational networks |
| D. | Extranets |
| Answer» B. Switching alternating | |
| 357. |
MAC is |
| A. | a method of determining which device has access to the transmission medium at any time |
| B. | a method access control technique or multiple-access transmission media |
| C. | a very common bit-oriented data link protocol issued to ISO. |
| D. | network access standard for connecting stations to a circuit-switched network |
| Answer» B. a method access control technique or multiple-access transmission media | |
| 358. |
The _____ houses the switches in token ring. |
| A. | transceiver |
| B. | nine-pin connector |
| C. | MAU |
| D. | NIC |
| Answer» D. NIC | |
| 359. |
How many pairs of stations can simultaneously communicate on Ethernet LAN? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | multiple |
| Answer» B. 2 | |
| 360. |
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 which permits digital to analog conversion at the start of a long distance transmission? |
| A. | Interface |
| B. | Modem |
| C. | Attenuation |
| D. | Teleprocessor |
| Answer» C. Attenuation | |
| 361. |
In geosynchronous orbit, satellite |
| A. | remains in a fixed position so that as earth rotates, it can fully cover the earth |
| B. | remains in a fixed position related to points on earth |
| C. | moves faster than the earth's rotation so that it can cover larger portion of earth. |
| D. | moves simultaneously |
| Answer» B. remains in a fixed position related to points on earth | |
| 362. |
Which of the following digits are known as the sub-address digits (for use by the user) of the Network User Address (NUA)? |
| A. | 43651 |
| B. | 43556 |
| C. | 43807 |
| D. | 13-14 |
| Answer» E. | |
| 363. |
A batch processing terminal would not include a |
| A. | CPU |
| B. | card reader |
| C. | card punch |
| D. | line printer |
| Answer» B. card reader | |
| 364. |
The cheapest modems can transmit |
| A. | 300 bits per second |
| B. | 1,200 bits per second |
| C. | 2,400 bits per second |
| D. | 4,800 bits per second |
| Answer» B. 1,200 bits per second | |
| 365. |
You are working with a network that is 172.16.0.0 and would like to support 600 hosts per subnet. What subnet mask should you use? |
| A. | 255.255.192.0 |
| B. | 255.255.224.0 |
| C. | 255.255.240.0 |
| D. | 255.255.248.0 |
| Answer» E. | |
| 366. |
We can receive data either through our television aerial or down our telephone lines and display this data on our television screen. What is the general name given to this process? |
| A. | Viewdata |
| B. | Teletext |
| C. | Telesoftware |
| D. | Videotex |
| Answer» E. | |
| 367. |
The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband. |
| A. | Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel |
| B. | Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable |
| C. | Baseband refers to local area networks, and broadband refers to wide area networks. |
| D. | Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed |
| Answer» C. Baseband refers to local area networks, and broadband refers to wide area networks. | |
| 368. |
The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer |
| A. | An additional token is added for every 1,000 nodes |
| B. | The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500 |
| C. | The network becomes less efficient |
| D. | After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device |
| Answer» E. | |
| 369. |
FDDI is a |
| A. | ring network |
| B. | star network |
| C. | mesh network |
| D. | bus based network |
| Answer» B. star network | |
| 370. |
Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS? |
| A. | 10 |
| B. | 12 |
| C. | 120 |
| D. | 1200 |
| Answer» D. 1200 | |
| 371. |
ARP (Address Resolution Protocol) is |
| A. | a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address |
| B. | a TCP/IP high level protocol for transferring files from one machine to another |
| C. | a protocol used to monitor computers |
| D. | a protocol that handles error and control messages |
| Answer» B. a TCP/IP high level protocol for transferring files from one machine to another | |
| 372. |
Which of the following is not a standard synchronous communication protocol? |
| A. | SDLC |
| B. | SMTP |
| C. | SLIP |
| D. | PAS |
| Answer» E. | |
| 373. |
Which of the following best describes the scopes on each DHCP server, in the absence of configuration problems with DHCP addresses, if you use multiple DHCP servers in your environment? |
| A. | Unique to that subnet only |
| B. | For different subnets |
| C. | For no more than two subnets |
| D. | For no subnets |
| Answer» C. For no more than two subnets | |
| 374. |
In OSI network architecture, the dialogue control and token management are responsibilities of |
| A. | session layer |
| B. | network layer |
| C. | transport layer |
| D. | data link layer |
| Answer» B. network layer | |
| 375. |
Avalanche photodiode receivers can detect hits of transmitted data by receiving |
| A. | 100 photons |
| B. | 200 photons |
| C. | 300 photons |
| D. | 400 photons |
| Answer» C. 300 photons | |
| 376. |
Which utility is useful for finding the local host name? |
| A. | NBTSTAT |
| B. | Netstat |
| C. | PING |
| D. | Hostname |
| Answer» E. | |
| 377. |
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 |
| Answer» C. nonzero | |
| 378. |
Which of the following is an advantage to using fiber optics data transmission? |
| A. | resistance to data theft |
| B. | fast data transmission rate |
| C. | low noise level |
| D. | few transmission errors |
| Answer» E. | |
| 379. |
Which of the following is an example of a client-server model? |
| A. | TELNET |
| B. | FTP |
| C. | DNS |
| D. | All of the above |
| Answer» E. | |
| 380. |
The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver |
| A. | cannot talk at once |
| B. | can receive and send data simultaneously |
| C. | can send or receive data one at a time |
| D. | can do one way data transmission only |
| Answer» C. can send or receive data one at a time | |
| 381. |
A modem is connected in between a telephone line and a |
| A. | network |
| B. | computer |
| C. | communication adapter |
| D. | serial port |
| Answer» D. serial port | |
| 382. |
What is the default subnet mask for a class C network? |
| A. | 127.0.0.1 |
| B. | 255.0.0.0 |
| C. | 255.255.0.0 |
| D. | 255.255.255.0 |
| Answer» E. | |
| 383. |
The encoding method specified in the EIA-232 standard is _____. |
| A. | NRZ-I |
| B. | NRZ-L |
| C. | Manchester |
| D. | Differential Manchester |
| Answer» C. Manchester | |
| 384. |
Which of the following is an important characteristic of LAN? |
| A. | application independent interfaces |
| B. | unlimited expansion |
| C. | low cost access for low bandwidth channels |
| D. | parallel transmission |
| Answer» B. unlimited expansion | |
| 385. |
Bus is |
| A. | one or more conductors that some as a common connection for a related group of devices |
| B. | a continuous frequency capable of being modulated or impressed with a second signal |
| C. | the condition when two or more stations attempt to use the same channel at the same time |
| D. | a collection of interconnected functional units that provides a data communications service among stations attached to the network |
| Answer» B. a continuous frequency capable of being modulated or impressed with a second signal | |
| 386. |
Communication network is |
| A. | one or more conductors that serve as a common connection for a related group of devices |
| B. | a continuous frequency capable of being modulated or impressed with a second signal |
| C. | the condition with two or more stations attempt to use the same channel at the same time |
| D. | a collection of interconnected functional units that provides a data communications service among stations attached to the network |
| Answer» E. | |
| 387. |
The synchronous modems are more costly than the asynchronous modems because |
| A. | they produce large volume of data |
| B. | they contain clock recovery circuits |
| C. | they transmit the data with stop and start bits. |
| D. | they operate with a larger bandwidth |
| Answer» C. they transmit the data with stop and start bits. | |
| 388. |
What is the default subnet mask for a class A network? |
| A. | 127.0.0.1 |
| B. | 255.0.0.0 |
| C. | 255.255.255.0.0 |
| D. | 255.255.255.0 |
| Answer» C. 255.255.255.0.0 | |
| 389. |
An error-detecting code inserted as a field in a block of data to be transmitted is known as |
| A. | Frame check sequence |
| B. | Error detecting code |
| C. | Checksum |
| D. | flow control |
| Answer» B. Error detecting code | |
| 390. |
What is the term used to describe addresses available on a DHCP server? |
| A. | Pools |
| B. | Scopes |
| C. | Ranges |
| D. | Notes |
| Answer» C. Ranges | |
| 391. |
What is the minimum number of wires required for sending data over a serial communications links? |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 392. |
Which of the following does not allow multiple users or devices to share one communications line? |
| A. | doubleplexer |
| B. | multipplexer |
| C. | concentrator |
| D. | controller |
| Answer» B. multipplexer | |
| 393. |
To connect a computer with a device in the same room, you might be likely to use |
| A. | a coaxial cable |
| B. | a dedicated line |
| C. | a ground station |
| D. | All of the above |
| Answer» B. a dedicated line | |
| 394. |
Telecommunications networks come in a wide range of speed and capacity capabilities. Select the best fit for answer: |
| A. | Bandwidth alternatives |
| B. | Switching alternating |
| C. | Inter organizational networks |
| D. | Extranets |
| Answer» B. Switching alternating | |
| 395. |
What protocol is used between E-Mail servers? |
| A. | FTP |
| B. | SMTP |
| C. | SNMP |
| D. | POP3 |
| Answer» C. SNMP | |
| 396. |
You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign? |
| A. | 255.240.0.0 |
| B. | 255.248.0.0 |
| C. | 255.252.0.0 |
| D. | 255.254.0.0 |
| Answer» E. | |
| 397. |
ICMP (Internet Control Message Protocol) is |
| A. | a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address |
| B. | a TCP/IP high level protocol for transferring files from one machine to another |
| C. | a protocol used to monitor computers |
| D. | a protocol that handles error and control messages |
| Answer» E. | |
| 398. |
The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to |
| A. | 0.003 |
| B. | 0.009 |
| C. | 0.991 |
| D. | 0.999 |
| Answer» C. 0.991 | |
| 399. |
RS-449/442-A/423-A is |
| A. | a set of physical layer standards developed by EIA and intended to replace RS-232-C. |
| B. | a check bit appended to an array of binary digits to make the sum of the all the binary digits |
| C. | 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 |
| D. | the ratio of the number of data units in error to the total number of data units |
| Answer» B. a check bit appended to an array of binary digits to make the sum of the all the binary digits | |
| 400. |
Frames from one LAN can be transmitted to another LAN via the device |
| A. | Router |
| B. | Bridge |
| C. | Repeater |
| D. | Modem |
| Answer» C. Repeater | |