Computer networking MCQ – Change your future

701. If the bit rate for an ASK signal is 1200 bps, the baud rate is.....

Correct Answer: Correct answer is: (D) 1200.

Exam Relevance: GATE, ECE, EE

Difficulty: Easy

Concept notes: In Amplitude Shift Keying (ASK), the baud rate is equal to the bit rate because each symbol represents one bit.

Common Mistakes: Students may confuse baud rate with bit rate in other modulation schemes where they are not equal.

Explanations: In ASK, each symbol represents one bit. Therefore, the baud rate, which is the number of symbols transmitted per second, is equal to the bit rate, which is the number of bits transmitted per second. Since the bit rate is given as 1200 bps, the baud rate is also 1200 baud.

Option Analysis:

Option A: Incorrect, as the baud rate is not 300 in ASK when the bit rate is 1200 bps.
Option B: Incorrect, as the baud rate is not 400 in ASK when the bit rate is 1200 bps.
Option C: Incorrect, as the baud rate is not 600 in ASK when the bit rate is 1200 bps.
Option D: Correct, as the baud rate is 1200 in ASK when the bit rate is 1200 bps.

702. The correct syntax to be written in the web browser to Telnet to www.gatecseit.in is

Correct Answer: Correct answer is: (C) Telnet://localhost:10005.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Moderate

Concept notes: The correct syntax for Telnet involves specifying the protocol, the host, and the port number.

Common Mistakes: Students often confuse the syntax for Telnet with other protocols or omit the port number.

Explanations: The correct syntax for Telnet includes the protocol (Telnet), followed by the host (localhost), and the port number (10005). The double slashes (//) are used to separate the protocol from the host and port. The claimed correct answer, Telnet://localhost:10005, adheres to this syntax.

Option Analysis:

Option A: Incorrect because it uses a single slash instead of double slashes.
Option B: Incorrect because it lacks the double slashes and the port number.
Option C: Correct because it uses the correct syntax with double slashes and includes the port number.
Option D: Incorrect because it lacks the double slashes and the port number.

703. A device that amplifies a signal as it passes through it to counteract the effects of attenuation.

Correct Answer: Correct answer is: (D) Repeater.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Easy

Concept notes: A repeater is a device that amplifies a signal to counteract the effects of attenuation, allowing the signal to travel further without degradation.

Common Mistakes: Students may confuse a repeater with other network devices like servers or clients, which do not have the function of signal amplification.

Explanations: A repeater is designed to amplify signals as they pass through it, which directly addresses the issue of signal attenuation. This makes it the correct choice for a device that counteracts signal degradation.

Option Analysis:

Option A: A server is a computer system that provides services to other computers over a network, not a device for signal amplification.
Option B: A client is a computer or device that accesses services provided by a server, not a device for signal amplification.
Option C: A cable is a physical medium for transmitting signals, but it does not amplify the signal itself.
Option D: A repeater is a device that amplifies signals to counteract attenuation, making it the correct choice.

Mnemonic: R for Repeater, R for Repeat and Reinforce.

704. What is the logical or physical layout of a local area network called?

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

Exam Relevance: CCNA, Network+, CompTIA A+

Difficulty: Easy

Concept notes: The logical or physical layout of a local area network (LAN) is referred to as its topology. This describes how the devices in the network are connected and the paths that data can take.

Common Mistakes: Students may confuse the term "topology" with "setup" or "configuration," which are more general terms and do not specifically refer to the layout of network connections.

Explanations: Topology is the correct term for the layout of a local area network. It defines the arrangement of network devices and the physical or logical structure of the network. This term is specific to network design and is not interchangeable with other terms like "setup" or "configuration."

Option Analysis:

Option A: "Setup" is a general term and does not specifically refer to the layout of network connections.
Option B: "Topology" is the correct term for the layout of a local area network.
Option C: "Configuration" refers to the settings and parameters of a network, not its layout.
Option D: "Channels" refer to the communication paths within a network, not the overall layout.

705. In cellular telephony, Interim Standard 95 (IS-95), produces data at a basic rate of

Correct Answer: Correct answer is: (A) 9.6 Kbps.

Exam Relevance: IEEE, ECE, Telecommunications Engineering Exams

Difficulty: Easy

Concept notes: Interim Standard 95 (IS-95) is a digital cellular technology standard used in CDMA networks. It specifies the basic data rate for voice and data transmission.

Common Mistakes: Students may confuse the data rate with other standards or technologies, such as GSM or CDMA2000, which have different data rates.

Explanations: IS-95 specifies a basic data rate of 9.6 Kbps for voice and data transmission. This is a well-established standard in the field of cellular telephony and is widely recognized in the industry.

Option Analysis:

Option A: Correct, as IS-95 specifies a basic data rate of 9.6 Kbps.
Option B: Incorrect, as 9.7 Kbps is not the specified rate for IS-95.
Option C: Incorrect, as 9.8 Kbps is not the specified rate for IS-95.
Option D: Incorrect, as 9.9 Kbps is not the specified rate for IS-95.

706. The wireless LAN specification is defined by IEEE, called, .....which covers the data link and physical layer

Correct Answer: Correct answer is: (B) IEEE 802.11.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Easy

Concept notes: IEEE 802.11 is the standard that defines the specifications for wireless local area networks (WLANs), covering the data link and physical layers.

Common Mistakes: Students may confuse IEEE 802.11 with other IEEE standards, such as IEEE 802.3 for Ethernet or IEEE 802.2 for the Logical Link Control (LLC) sublayer.

Explanations: IEEE 802.11 is the correct answer because it is the standard that defines the specifications for wireless local area networks (WLANs). It covers the data link layer and physical layer, which are essential for wireless communication protocols.

Option Analysis:

Option A: IEEE 802.2 is incorrect because it pertains to the Logical Link Control (LLC) sublayer, not wireless LANs.
Option B: IEEE 802.11 is correct as it defines the specifications for wireless LANs.
Option C: IEEE 802.3 is incorrect because it pertains to Ethernet, not wireless LANs.
Option D: IEEE 802.5 is incorrect because it pertains to Token Ring networks, not wireless LANs.

707. A simple session using SIP consists of three modules: establishing, communicating and

Correct Answer: Correct answer is: (D) Termination.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: A simple session using SIP (Session Initiation Protocol) involves three main stages: establishing the session, communicating during the session, and terminating the session.

Common Mistakes: Students may confuse the stages of a SIP session with other network protocols or processes, leading to incorrect identification of the final stage.

Explanations: The correct answer is termination because after establishing and communicating, the final step in a SIP session is to properly end the session. This ensures resources are released and the session is cleanly closed.

Option Analysis:

Option A: Translation is not a stage in a SIP session. It refers to converting data from one format to another, which is not relevant here.
Option B: Conversion is not a stage in a SIP session. It refers to changing data from one form to another, which is not part of the session process.
Option C: Streaming is not a stage in a SIP session. It refers to the continuous flow of data, which is a part of the communication phase but not a separate stage.
Option D: Termination is the correct stage as it involves ending the session properly after communication is complete.

708. MLT-3 schemes uses three levels

Correct Answer: Correct answer is: (A) 0, V, -V.

Exam Relevance: Computer Networks, Digital Communications, Telecommunications

Difficulty: Easy

Concept notes: MLT-3 schemes use three distinct voltage levels for data transmission.

Common Mistakes: Students may confuse MLT-3 with other multi-level schemes that use different voltage levels.

Explanations: MLT-3 (Modified Level Ternary) is a line coding scheme that uses three voltage levels: 0, V, and -V. This scheme is designed to minimize the number of transitions and reduce the bandwidth required for transmission. The levels 0, V, and -V represent the three possible states in the scheme, which are used to encode binary data.

Option Analysis:

Option A: Correct. MLT-3 uses the voltage levels 0, V, and -V.
Option B: Incorrect. The levels 0, 1, 2 do not represent the voltage levels used in MLT-3.
Option C: Incorrect. The letters M, L, T do not represent voltage levels in MLT-3.
Option D: Incorrect. The levels 0, -1, -2 do not represent the voltage levels used in MLT-3.

709. Network that cover a Wide Area is known as .....

Correct Answer: Correct answer is: (B) Wide Area Network.

Exam Relevance: CCNA, CompTIA Network+, ITIL Foundation

Difficulty: Very Easy

Concept notes: A Wide Area Network (WAN) is a network that covers a broad area, such as a city, country, or even globally.

Common Mistakes: Students may confuse WAN with LAN (Local Area Network) or MAN (Metropolitan Area Network).

Explanations: The term "Wide Area Network" (WAN) is the standard and widely accepted term for a network that spans a large geographical area. It is used to connect computers and other network devices over long distances, often using telecommunications networks.

Option Analysis:

Option A: "Large Area Network" is not a standard term used in networking.
Option B: "Wide Area Network" is the correct term for a network that covers a wide geographical area.
Option C: "Big Area Network" is not a standard term used in networking.
Option D: "None of the above" is incorrect as "Wide Area Network" is the correct term.

Mnemonic: WAN - Wide Area Network

710. SCTP protocol combines best features of

Correct Answer: Correct answer is: (D) Both a and c.

Exam Relevance: Computer Networks, Network Security, Data Communication

Difficulty: Moderate

Concept notes: SCTP (Stream Control Transmission Protocol) combines the best features of both UDP and TCP.

Common Mistakes: Students may mistakenly believe SCTP only combines features from one of the protocols, rather than both.

Explanations: SCTP is designed to provide reliable, ordered, and sequenced delivery of user data, similar to TCP. However, it also supports multiple streams and multihoming, which are features more akin to UDP. Therefore, SCTP combines the reliable delivery and error correction of TCP with the flexibility and efficiency of UDP.

Option Analysis:

Option A: UDP is a part of the features combined in SCTP, but it is not the only protocol.
Option B: SMTP is not related to the features combined in SCTP.
Option C: TCP is a part of the features combined in SCTP, but it is not the only protocol.
Option D: SCTP combines the best features of both UDP and TCP, making this the correct answer.

Mnemonic: SCTP: Stream Control Transmission Protocol, Think UDP and TCP

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Computer networking MCQ - Set 71

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