Computer networking MCQ – Change your future

261. What do the letters HTTP stand for?

Correct Answer: Correct answer is: (A) Hyper Text Transfer Protocol.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Very Easy

Concept notes: HTTP stands for Hyper Text Transfer Protocol, which is a protocol used for transferring data over the internet.

Common Mistakes: Students may confuse HTTP with other acronyms or protocols, such as HTTPS (Hyper Text Transfer Protocol Secure).

Explanations: HTTP is the standard protocol used for transmitting web pages and other data over the internet. It is a request-response protocol in which a client (such as a web browser) sends a request to a server, and the server responds with the requested data. The acronym stands for Hyper Text Transfer Protocol, where "Hyper Text" refers to the structured text format used in web pages, and "Transfer Protocol" refers to the method of transferring this data.

Option Analysis:

Option A: Correct. HTTP stands for Hyper Text Transfer Protocol.
Option B: Incorrect. This is not a valid acronym for HTTP.
Option C: Incorrect. While "Hyper Text" is correct, "Protocol" alone does not fully describe HTTP.
Option D: Incorrect. This is not a valid acronym for HTTP.

262. Twisted pair wires, coaxial cable, optical fiber cables are the examples of:

Correct Answer: Correct answer is: (A) Wired Media.

Exam Relevance: Computer Networks, Data Communication, Information Technology

Difficulty: Easy

Concept notes: Wired media refers to physical cables used for data transmission.

Common Mistakes: Students may confuse wired media with wireless media, which uses radio waves or infrared signals for data transmission.

Explanations: Twisted pair wires, coaxial cable, and optical fiber cables are all examples of physical cables used for data transmission. These cables are classified as wired media because they require a physical connection to transmit data. Wireless media, on the other hand, does not use physical cables and instead relies on electromagnetic waves for data transmission.

Option Analysis:

Option A: Correct. Twisted pair wires, coaxial cable, and optical fiber cables are examples of wired media.
Option B: Incorrect. Wireless media does not include physical cables.
Option C: Incorrect. The examples provided are exclusively wired media.
Option D: Incorrect. The correct answer is provided in option A.

263. Arge computer network that spans a metropolitan area and falls between a LAN and a WAN

Correct Answer: Correct answer is: (B) MAN.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: A Metropolitan Area Network (MAN) is a computer network that spans a metropolitan area, such as a city or large campus. It is larger than a Local Area Network (LAN) but smaller than a Wide Area Network (WAN).

Common Mistakes: Students may confuse MAN with LAN or WAN due to the similar naming conventions and overlapping functionalities.

Explanations: A MAN is designed to cover a larger geographical area than a LAN but is not as extensive as a WAN. It is typically used to connect multiple LANs within a city or a large campus. The correct answer is MAN because it fits the description of a network that spans a metropolitan area and falls between a LAN and a WAN.

Option Analysis:

Option A: LAN is a Local Area Network, which is typically confined to a small area like a home, office, or school. It does not span a metropolitan area.
Option B: MAN is a Metropolitan Area Network, which spans a metropolitan area and fits the description given in the question.
Option C: WAN is a Wide Area Network, which covers a large geographical area, such as different cities or countries. It is larger than a MAN.
Option D: NET is not a standard term for a type of network and does not fit the description given in the question.

Mnemonic: MAN: Metropolitan Area Network

264. SCTP allows..... service in each association.

Correct Answer: Correct answer is: (B) Multistream.

Exam Relevance: Computer Networks, Data Communication, Network Protocols

Difficulty: Moderate

Concept notes: SCTP (Stream Control Transmission Protocol) supports multiple streams within a single association, allowing for parallel data transmission.

Common Mistakes: Students may mistakenly believe that SCTP only supports a single stream, similar to TCP.

Explanations: SCTP allows multiple streams within each association, enabling parallel data transmission. This feature distinguishes SCTP from TCP, which only supports a single stream. The multistream capability in SCTP enhances performance and efficiency in data transmission.

Option Analysis:

Option A: Incorrect, as SCTP supports multiple streams, not just a single stream.
Option B: Correct, SCTP supports multistream within each association.
Option C: Incorrect, as SCTP supports more than just double streams.
Option D: Incorrect, as SCTP does support multistream.

Mnemonic: SCTP: Stream Control Transmission Protocol, Multistream Magic

265. Which organization has authority over interstate and international commerce in the communications field?

Correct Answer: Correct answer is: (C) FCC.

Exam Relevance: FCC exams, Telecommunications Regulatory Exams, Communications Law Exams

Difficulty: Easy

Concept notes: The Federal Communications Commission (FCC) is the U.S. government agency responsible for regulating interstate and international communications by radio, television, wire, satellite, and cable in all 50 states, the District of Columbia, and U.S. territories.

Common Mistakes: Students may confuse the FCC with other organizations like the ITU-T, which focuses on international telecommunications standards, or the IEEE, which is more involved in electrical and electronic engineering standards.

Explanations: The FCC has the authority over interstate and international commerce in the communications field. This includes regulating radio, television, wire, satellite, and cable communications. The other options, such as ITU-T, IEEE, and ISOC, do not have the same regulatory authority over communications commerce.

Option Analysis:

Option A: ITU-T is the International Telecommunication Union's Telecommunication Standardization Sector, which focuses on developing international standards for telecommunications, not regulatory authority over commerce.
Option B: IEEE is the Institute of Electrical and Electronics Engineers, which is involved in the development of standards and technical documents, but not in regulatory authority over communications commerce.
Option C: FCC is the Federal Communications Commission, which has the authority over interstate and international commerce in the communications field.
Option D: ISOC is the Internet Society, which promotes the open development, evolution, and use of the Internet, but does not have regulatory authority over communications commerce.

Mnemonic: FCC: Federal Communications Control

266. Which type of cable is very expensive?

Correct Answer: Correct answer is: (C) Optical Fibre Cable.

Exam Relevance: Computer Networks, Telecommunications, Data Communication

Difficulty: Moderate

Concept notes: Optical fibre cables are known for their high cost due to the advanced technology and materials used in their construction.

Common Mistakes: Students may confuse the cost of optical fibre cables with other types of cables, such as twisted pair or coaxial cables, which are generally less expensive.

Explanations: Optical fibre cables are very expensive because they use specialized materials and manufacturing processes. These cables transmit data using light, which requires precise alignment and high-quality materials to ensure minimal signal loss. The cost of these materials and the complexity of the manufacturing process contribute to the high price of optical fibre cables.

Option Analysis:

Option A: Twisted pair cables are relatively inexpensive and commonly used for short-distance data transmission.
Option B: Coaxial cables are more expensive than twisted pair cables but are still less expensive than optical fibre cables.
Option C: Optical fibre cables are the most expensive due to the advanced technology and materials used in their construction.
Option D: This option is incorrect as optical fibre cables are indeed very expensive.

267. When we represent data in CDMA, if a station is idle then it sends

Correct Answer: Correct answer is: (A) 0.

Exam Relevance: IEEE, ECE, GATE

Difficulty: Easy

Concept notes: In CDMA (Code Division Multiple Access), idle stations typically send a signal representing 0 to maintain synchronization and avoid interference.

Common Mistakes: Students may confuse the idle state with active states, where -1 or 1 might be used for data transmission.

Explanations: In CDMA, idle stations send a signal representing 0 to maintain synchronization with the network. This ensures that the idle station does not interfere with active data transmissions and helps in maintaining the integrity of the communication system.

Option Analysis:

Option A: Correct. Idle stations send 0 to maintain synchronization.
Option B: Incorrect. -1 is not used for idle states in CDMA.
Option C: Incorrect. 1 is used for active data transmission, not idle states.
Option D: Incorrect. Infinity is not a valid signal in CDMA.

268. ..... satellites provide time and location information for vehicles and ships.

Correct Answer: Correct answer is: (A) GPS.

Exam Relevance: GATE, GRE, GMAT, Civil Services

Difficulty: Easy

Concept notes: GPS (Global Positioning System) satellites provide precise time and location information for vehicles and ships.

Common Mistakes: Students may confuse GPS with other satellite systems like Iridium or Teledesic, which are primarily for communication rather than navigation.

Explanations: GPS satellites orbit the Earth and transmit signals that can be received by GPS receivers. These signals allow the receivers to calculate their precise location, speed, and time. This makes GPS ideal for navigation and tracking purposes for vehicles and ships.

Option Analysis:

Option A: Correct. GPS satellites provide time and location information for vehicles and ships.
Option B: Incorrect. Iridium satellites are primarily used for global satellite communication, not for providing precise location and time information.
Option C: Incorrect. Teledesic was a proposed satellite constellation for broadband internet services, not for navigation or location services.
Option D: Incorrect. Since GPS is the correct answer, this option is not applicable.

269. Layer 2 lies between the physical layer and the..... layer.

Correct Answer: Correct answer is: (A) Network.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: Layer 2 in the OSI model is the Data Link Layer, which is directly above the Physical Layer and below the Network Layer.

Common Mistakes: Students may confuse the Data Link Layer with the Network Layer, as both deal with addressing and routing.

Explanations: Layer 2, the Data Link Layer, is responsible for the reliable transfer of data between nodes on the same network segment. It lies directly above the Physical Layer, which deals with the physical transmission of data, and below the Network Layer, which handles the routing of data across different networks.

Option Analysis:

Option A: Correct. The Network Layer is Layer 3 in the OSI model, directly above the Data Link Layer (Layer 2).
Option B: Incorrect. The Data Link Layer is Layer 2 itself, not the layer above it.
Option C: Incorrect. The Transport Layer is Layer 4, which is above the Network Layer.
Option D: Incorrect. The correct answer is provided in the options.

270. There is (are)..... orbit(s) for a GEO satellite.

Correct Answer: Correct answer is: (A) One.

Exam Relevance: GATE, GRE, FE Exam

Difficulty: Easy

Concept notes: A GEO (Geostationary Earth Orbit) satellite is positioned at a specific altitude above the Earth's equator, where its orbital period matches the Earth's rotation period. This ensures the satellite remains stationary relative to a point on the Earth's surface.

Common Mistakes: Students may mistakenly believe there are multiple GEO orbits, possibly due to confusion with other types of orbits or the idea that satellites can be placed at various points along the equator.

Explanations: A GEO satellite must be placed at a specific altitude of approximately 35,786 kilometers above the Earth's equator. This unique orbit ensures that the satellite's orbital period is exactly 24 hours, matching the Earth's rotation period. Therefore, there is only one such orbit for a GEO satellite.

Option Analysis:

Option A: Correct. There is only one specific orbit for a GEO satellite.
Option B: Incorrect. There is not more than one GEO orbit.
Option C: Incorrect. There are not multiple GEO orbits.
Option D: Incorrect. There is indeed a specific GEO orbit.

Mnemonic: One Orbit, One Spot, GEO.

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Computer networking MCQ - Set 27

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