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.
| 251. |
You have a network ID of 134.57.0.0 and you need to divide it into multiple subnets in which at least 600 host IDs for each subnet are available. You desire to have the largest amount of subnets available. Which subnet mask should you assign? |
| A. | 255.255.224.0 |
| B. | 255.255.240.0 |
| C. | 255.255.248.0 |
| D. | 255.255.255.0 |
| Answer» E. | |
| 252. |
Business meeting and conferences can be held by linking distantly located people through a computer network. Not only the participants exchange information but are able to see each other. What is it called? |
| A. | Telemeeting |
| B. | Telemailing |
| C. | Teleconferencing |
| D. | Teletalking |
| Answer» D. Teletalking | |
| 253. |
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 |
| Answer» B. 10 times the fiber radius | |
| 254. |
Distributed Queue Dual Bus is a standard for |
| A. | LAN |
| B. | MAN |
| C. | WAN |
| D. | Wireless LAN. |
| Answer» E. | |
| 255. |
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? |
| A. | Layer 7 protocols |
| B. | Layer 6 protocols |
| C. | Layer 5 protocols |
| D. | Layer 4 protocols |
| Answer» B. Layer 6 protocols | |
| 256. |
A required characteristic of an online real-time system is: |
| A. | more than one CPU |
| B. | offline batch processing |
| C. | no delay in processing |
| D. | All of the above |
| Answer» D. All of the above | |
| 257. |
Which of the following uses network address translation? |
| A. | Routers |
| B. | Network adapter drivers |
| C. | Hubs |
| D. | Windows 95 |
| Answer» C. Hubs | |
| 258. |
Which of the following digits are known as the terminal number of the Network User Address (NUA)? |
| A. | 43651 |
| B. | 43556 |
| C. | 43807 |
| D. | 13-14 |
| Answer» D. 13-14 | |
| 259. |
How can you see the address of the DHCP server from which a client received its IP address? |
| A. | By using Advanced Properties of TCP/IP |
| B. | By using IPCONFIG/ALL |
| C. | By using DHCPINFO |
| D. | By pinging DHCP |
| Answer» C. By using DHCPINFO | |
| 260. |
A network designer wants to connect 5 routers as point-to-point simplex line. Then the total number of lines required would be |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 32 |
| Answer» C. 20 | |
| 261. |
A communication network which is used by large organizations over regional, national or global area is called |
| A. | LAN |
| B. | WAN |
| C. | MAN |
| D. | Intranet |
| Answer» C. MAN | |
| 262. |
A distributed data processing configuration in which all activities must pass through a centrally located computer is called a: |
| A. | ring network |
| B. | spider network |
| C. | hierarchical network |
| D. | data control network |
| Answer» C. hierarchical network | |
| 263. |
A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission rate? |
| A. | 1.5 Mbaud/sec |
| B. | 6 Mband/sec |
| C. | 12 Mbaud/sec |
| D. | 24 Mbaud/sec |
| Answer» D. 24 Mbaud/sec | |
| 264. |
Which of the following technique is used for Time-To-Line (TTL)? |
| A. | a technique used in best-effort delivery system 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 |
| Answer» 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 | |
| 265. |
You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports four subnets and a maximum number of hosts? |
| A. | 255.255.255.192 |
| B. | 255.255.255.224 |
| C. | 255.255.255.240 |
| D. | 255.255.255.248 |
| Answer» C. 255.255.255.240 | |
| 266. |
End-to-end connectivity is provided from host-to-host in: |
| A. | Network layer |
| B. | Session layer |
| C. | Data link layer |
| D. | Transport layer |
| Answer» E. | |
| 267. |
To make possible the efficient on-line servicing of many teleprocessing system users on large computer systems, designers are developing |
| A. | communication systems |
| B. | multiprogramming systems |
| C. | virtual storage systems |
| D. | All of the above |
| Answer» E. | |
| 268. |
The loss in signal power as light travels down the fiber is called |
| A. | attenuation |
| B. | propagation |
| C. | scattering |
| D. | interruption |
| Answer» B. propagation | |
| 269. |
An example of an analog communication method is |
| A. | laser beam |
| B. | microwave |
| C. | voice grade telephone line |
| D. | All of the above |
| Answer» E. | |
| 270. |
Which of the following is required to communicate between two computers? |
| A. | communications software |
| B. | protocol |
| C. | communications hardware |
| D. | access to transmission medium |
| Answer» E. | |
| 271. |
Which of the following summation operation is performed on the bits to check an error-detecting code? |
| A. | Codec |
| B. | Coder-decoder |
| C. | Checksum |
| D. | Attenuation |
| Answer» D. Attenuation | |
| 272. |
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases. |
| A. | Network collisions occur |
| B. | Repeaters cannot increase the signal strength sufficiently |
| C. | Cable terminators do not reflect the signal properly |
| D. | Cable terminators do not absorb the signal properly |
| Answer» B. Repeaters cannot increase the signal strength sufficiently | |
| 273. |
If you configure the TCP/IP address and other TCP/IP parameters manually, you can always verify the configuration through which of the following? Select the best answer. |
| A. | Network Properties dialog box |
| B. | Server Services dialog box |
| C. | DHCPINFO command-line utility |
| D. | Advanced Properties tab of TCP/ IP Info. |
| Answer» B. Server Services dialog box | |
| 274. |
A distributed network configuration in which all data/information pass through a central computer is |
| A. | bus network |
| B. | star network |
| C. | ring network |
| D. | Point-to-point network |
| Answer» C. ring network | |
| 275. |
Which transmission mode is used for data communication along telephone lines? |
| A. | Parallel |
| B. | Serial |
| C. | Synchronous |
| D. | Asynchronous |
| Answer» C. Synchronous | |
| 276. |
Thorough planning must take place when setting up an 802.3 network. A maximum number of segments can separate any two nodes on the network. What is the maximum number of segments allowed between two nodes? |
| A. | Five |
| B. | Two |
| C. | Four |
| D. | Six |
| Answer» B. Two | |
| 277. |
With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site? |
| A. | 192 |
| B. | 224 |
| C. | 240 |
| D. | 248 |
| Answer» E. | |
| 278. |
A remote batch-processing operation in which data is solely input to a central computer would require a: |
| A. | telegraph line |
| B. | simplex lines |
| C. | mixedband channel |
| D. | All the above |
| Answer» C. mixedband channel | |
| 279. |
The slowest transmission speeds are those of |
| A. | twisted-pair wire |
| B. | coaxial cable |
| C. | fiber-optic cable |
| D. | microwaves |
| Answer» B. coaxial cable | |
| 280. |
How many hosts are attached to each of the local area networks at your site? |
| A. | 128 |
| B. | 254 |
| C. | 256 |
| D. | 64 |
| Answer» C. 256 | |
| 281. |
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent? |
| A. | 32 kbps |
| B. | 8 kbps |
| C. | 128 kbps |
| D. | 64 kbps. |
| Answer» C. 128 kbps | |
| 282. |
Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the most correct answer. |
| A. | Modem |
| B. | Cable |
| C. | Hub |
| D. | Router |
| Answer» E. | |
| 283. |
A modem that is attached to the telephone system by jamming the phone's handset into two flexible receptacles in the coupler? |
| A. | gateway |
| B. | bridge |
| C. | acoustic coupler |
| D. | time-division multiplexer |
| Answer» D. time-division multiplexer | |
| 284. |
Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another? |
| A. | FTP |
| B. | SNMP |
| C. | SMTP |
| D. | RPC |
| Answer» D. RPC | |
| 285. |
Which utility is an all-purpose tool for troubleshooting TCP/IP problems? |
| A. | NBTSTAT |
| B. | Netstat |
| C. | PING |
| D. | Hostname |
| Answer» D. Hostname | |
| 286. |
CSMA (Carrier Sense Multiple Access) is |
| A. | a method of determining which device has access to the transmission medium at any time |
| B. | a method access control technique for multiple-access transmission media. |
| C. | a very common bit-oriented data link protocol issued by ISO. |
| D. | network access standard for connecting stations to a circuit-switched network |
| Answer» C. a very common bit-oriented data link protocol issued by ISO. | |
| 287. |
TCP is: |
| A. | Operates at the Data Link layer |
| B. | Connection orientated and unreliable |
| C. | Connection orientated and reliable |
| D. | Connectionless and unreliable |
| Answer» D. Connectionless and unreliable | |
| 288. |
Which of the following summation operations is performed on the bits to check an error-detecting code? |
| A. | Codec |
| B. | Coder-decoder |
| C. | Checksum |
| D. | Attenuation |
| Answer» D. Attenuation | |
| 289. |
A band is always equivalent to |
| A. | a byte |
| B. | a bit |
| C. | 100 bits |
| D. | 16 bits |
| Answer» E. | |
| 290. |
Now-a-days computers all over the world can talk to each other. Which is one of the special accessories essential for this purpose? |
| A. | Keyboard |
| B. | Modem |
| C. | Scanner |
| D. | Fax |
| Answer» C. Scanner | |
| 291. |
Telecommunication networks frequently interconnect an organization with its customers and suppliers. Select the best fit for answer: |
| A. | Bandwidth alternatives |
| B. | Switching alternating |
| C. | Inter organizational networks |
| D. | Extranets |
| Answer» D. Extranets | |
| 292. |
A front-end processor is |
| A. | a user computer system |
| B. | a processor in a large-scale computer that executes operating system instructions |
| C. | a minicomputer that relieves main-frame computers at a computer centre of communications control functions |
| D. | preliminary processor of batch jobs. |
| Answer» D. preliminary processor of batch jobs. | |
| 293. |
How much power (roughly) a light-emitting diode can couple into an optical fiber? |
| A. | 100 microwatts |
| B. | 440 microwatts |
| C. | 100 picowatts |
| D. | 10 milliwatts |
| Answer» B. 440 microwatts | |
| 294. |
A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as |
| A. | Attenuation |
| B. | Amplitude |
| C. | Aloha |
| D. | Carrier |
| Answer» B. Amplitude | |
| 295. |
Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size? |
| A. | 4 |
| B. | 8 |
| C. | 15 |
| D. | 16 |
| Answer» D. 16 | |
| 296. |
With telecommunications and a personal computer you can |
| A. | "download" free public domain programs |
| B. | send letters to be printed and delivered by the post office |
| C. | order goods at a substantial discount |
| D. | All of the above |
| Answer» E. | |
| 297. |
Eight stations are competing for the use of a shared channel using the 'Adaptive tree Walk Protocol'. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention? |
| A. | 7 slots |
| B. | 5 slots |
| C. | 10 slots |
| D. | 14 slots |
| Answer» B. 5 slots | |
| 298. |
Videotex is a combination of |
| A. | television |
| B. | communication |
| C. | computer technology |
| D. | All of the above |
| Answer» E. | |
| 299. |
A computer that handles resource sharing and network management in a local area network. Select the best fit for answer: |
| A. | Network Server |
| B. | Virtual Private Network |
| C. | Network operating system |
| D. | OSI |
| Answer» B. Virtual Private Network | |
| 300. |
Which of the following is not a disadvantage of wireless LAN? |
| A. | Slower data transmission |
| B. | higher error rate |
| C. | interference of transmissions from different computers |
| D. | All of the above |
| Answer» E. | |