Computer networking MCQ

951. Which of the following requires that all channels in a message transmission path be of the same speed?

Correct Answer: Correct answer is: (B) Circuit-switched networks.

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Moderate

Concept notes: In circuit-switched networks, a dedicated path is established between the sender and receiver for the duration of the communication. This path must have consistent bandwidth and speed to ensure reliable transmission.

Common Mistakes: Students may confuse circuit-switched networks with packet-switched networks, where packets can travel through different paths with varying speeds.

Explanations: Circuit-switched networks require a dedicated path for communication, which means all channels in the path must be of the same speed to maintain consistent data transmission. This is because the path is reserved for the duration of the communication, and any variation in speed could disrupt the flow of data.

Option Analysis:

Option A: Packet-switched networks do not require all channels to be of the same speed as packets can travel through different paths with varying speeds.
Option B: Circuit-switched networks require all channels in the path to be of the same speed to ensure consistent data transmission.
Option C: Message-switched networks do not require all channels to be of the same speed as messages can be stored and forwarded at different speeds.
Option D: This option is incorrect as circuit-switched networks do have the requirement for consistent channel speed.

Mnemonic: Circuit-switched: Consistent Speed

952. In computer, FDDI is a

Correct Answer: Correct answer is: (A) Ring network.

Exam Relevance: Computer Networks, Data Communication, Network Fundamentals

Difficulty: Easy

Concept notes: FDDI stands for Fiber Distributed Data Interface, which is a standard for data transmission in a local area network (LAN) that uses optical fiber as a transmission medium. FDDI is designed to form a ring network topology.

Common Mistakes: Students may confuse FDDI with other network topologies such as star or bus networks, which are not the primary design of FDDI.

Explanations: FDDI is specifically designed to operate in a ring network topology. In a ring network, each node is connected to two other nodes, forming a closed loop. Data travels in one direction around the ring, and each node can transmit data to the next node in the sequence. This design ensures that data can be transmitted efficiently and reliably, making it suitable for high-speed data transmission in LANs.

Option Analysis:

Option A: Correct. FDDI is a ring network.
Option B: Incorrect. FDDI is not a star network.
Option C: Incorrect. FDDI is not a mesh network.
Option D: Incorrect. FDDI is not a bus network.

Mnemonic: Ring Around the FDDI

953. A hardware device used to create a connection between two separate computer networks or to divide one network into two.

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

Exam Relevance: CCNA, Network+, CIW

Difficulty: Easy

Concept notes: A bridge is a hardware device that connects two separate computer networks or segments of a network at the data link layer (Layer 2) of the OSI model.

Common Mistakes: Students may confuse a bridge with a router, which operates at the network layer (Layer 3) and can connect different types of networks.

Explanations: A bridge is used to connect two separate computer networks or to divide one network into two segments. It operates at the data link layer (Layer 2) of the OSI model, examining the MAC addresses of the frames it receives to determine whether to forward the data to the other network segment. This makes it suitable for the described function.

Option Analysis:

Option A: Correct. A bridge connects two separate computer networks or segments of a network at the data link layer.
Option B: Incorrect. A router operates at the network layer (Layer 3) and is used to connect different types of networks.
Option C: Incorrect. A switch operates at the data link layer but is used to connect multiple devices within a single network segment, not to connect separate networks.
Option D: Incorrect. An access point is used to connect wireless devices to a network, not to connect separate networks.

Mnemonic: Bridge the gap between two networks.

954. ..... is created by joining several LANs together

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: A WAN (Wide Area Network) is a network that spans a large geographical area, often connecting multiple LANs (Local Area Networks) together.

Common Mistakes: Students may confuse WAN with LAN, thinking that a LAN can span large areas, which is incorrect.

Explanations: A WAN is created by joining several LANs together, which allows for communication and data transfer over large geographical distances. This is in contrast to a LAN, which is typically confined to a single location.

Option Analysis:

Option A: A PAN (Personal Area Network) is a network for interconnecting devices centered around an individual's workspace and is not created by joining several LANs together.
Option B: A WAN (Wide Area Network) is created by joining several LANs together, allowing for communication over large geographical areas.
Option C: A WLAN (Wireless Local Area Network) is a wireless version of a LAN and does not involve joining multiple LANs together.
Option D: This option is incorrect as the correct answer is B.

Mnemonic: WAN: Wide Area Network, "W" for "Worldwide" connections.

955. In....., a table associating a logical address with a physical address is updated manually.

Correct Answer: Correct answer is: (A) Static mapping.

Exam Relevance: Operating Systems, Computer Architecture, Memory Management

Difficulty: Easy

Concept notes: Static mapping involves manually updating a table that associates logical addresses with physical addresses.

Common Mistakes: Students may confuse static mapping with dynamic mapping, where the table is updated automatically by the operating system.

Explanations: In static mapping, the table associating logical addresses with physical addresses is updated manually. This means that the mapping between logical and physical addresses is fixed and does not change during the execution of a program. This contrasts with dynamic mapping, where the operating system automatically updates the mapping table as needed.

Option Analysis:

Option A: Correct. Static mapping involves manual updates to the address mapping table.
Option B: Incorrect. Dynamic mapping involves automatic updates to the address mapping table by the operating system.
Option C: Incorrect. Physical mapping is not a standard term in this context and does not describe the manual updating of address mappings.
Option D: Incorrect. The correct answer is explicitly provided as static mapping.

956. SONET/SDH is a synchronous network using synchronous

Correct Answer: Correct answer is: (A) TDM multiplexing.

Exam Relevance: Networking exams, Telecommunications exams, Computer Science exams

Difficulty: Moderate

Concept notes: SONET/SDH networks use synchronous TDM (Time Division Multiplexing) to combine multiple lower-rate signals into a higher-rate signal.

Common Mistakes: Students may confuse SONET/SDH with other multiplexing techniques like CDMA (Code Division Multiple Access), which is not used in SONET/SDH.

Explanations: SONET/SDH is a synchronous network that relies on TDM multiplexing to synchronize and combine multiple data streams into a single, higher-rate stream. This ensures that all data streams are aligned and can be transmitted efficiently over the network. TDM is the correct choice because it is the multiplexing technique specifically used in SONET/SDH networks.

Option Analysis:

Option A: Correct. SONET/SDH uses TDM multiplexing to synchronize and combine data streams.
Option B: Incorrect. CDMA is not used in SONET/SDH networks.
Option C: Incorrect. TDM demultiplexing is the reverse process of combining signals, not the method used in SONET/SDH.
Option D: Incorrect. CDMA demultiplexing is not relevant to SONET/SDH networks.

Mnemonic: SONET/SDH = Sync TDM

957. Three modes of TELNET implementations are default mode, character mode and

Correct Answer: Correct answer is: (B) Line Mode.

Exam Relevance: CCNA, Network+, CompTIA Network+

Difficulty: Moderate

Concept notes: TELNET, a protocol used for remote terminal connection, operates in different modes to handle data transmission. The three primary modes are default mode, character mode, and line mode.

Common Mistakes: Students may confuse the different modes of TELNET with other protocols or network configurations, leading to incorrect selection.

Explanations: TELNET operates in three main modes: default mode, character mode, and line mode. Default mode sends each keystroke immediately to the server. Character mode sends data after a specific character is typed, such as a carriage return. Line mode sends the entire line of text after the user presses the enter key. Therefore, the correct answer is Line Mode.

Option Analysis:

Option A: Server Mode is not a recognized TELNET mode.
Option B: Line Mode is one of the three recognized TELNET modes.
Option C: Log Mode is not a recognized TELNET mode.
Option D: IP Mode is not a recognized TELNET mode.

958. To distinguish between different data chunks belonging to same strea, M SCTP uses

Correct Answer: Correct answer is: (A) Stream Sequence Number.

Exam Relevance: Computer Networks, Network Protocols, SCTP

Difficulty: Moderate

Concept notes: In SCTP (Stream Control Transmission Protocol), Stream Sequence Numbers are used to distinguish between different data chunks belonging to the same stream.

Common Mistakes: Students often confuse Stream Sequence Number with other sequence numbers used in SCTP, such as the Transmission Sequence Number or the Stream Identifier.

Explanations: SCTP uses Stream Sequence Numbers to ensure that data chunks within the same stream are correctly ordered and identified. Each stream has its own sequence number, which helps in distinguishing between different data chunks within the same stream. This is crucial for maintaining the integrity and order of data transmission.

Option Analysis:

Option A: Stream Sequence Number is the correct term used in SCTP to distinguish between different data chunks within the same stream.
Option B: Stream Serial Number is not a term used in SCTP for this purpose.
Option C: Stream Segment Number is not a term used in SCTP for this purpose.
Option D: Stream Slot Number is not a term used in SCTP for this purpose.

Mnemonic: SSN for Stream Sequence Number.

959. 11i provides what?

Correct Answer: Correct answer is: (C) Additional security.

Exam Relevance: Oracle Certification Exams, IT Security Exams

Difficulty: Moderate

Concept notes: 11i provides additional security features compared to its predecessor.

Common Mistakes: Students may confuse 11i with other versions that focus on speed or quality of service.

Explanations: 11i, often associated with Oracle's E-Business Suite, includes enhanced security features such as improved authentication mechanisms, encryption, and access control. These features are designed to protect against a wide range of security threats, making it a significant upgrade in terms of security over previous versions.

Option Analysis:

Option A: Quality of service is not the primary focus of 11i.
Option B: Doubling the speed is not a feature of 11i.
Option C: 11i provides additional security features.
Option D: While 11i does offer security improvements, it does not provide all the features listed in the other options.

960. A network point that provides entrance into another network is called as.....

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: A gateway is a network point that serves as an entrance into another network.

Common Mistakes: Students may confuse a gateway with a router or switch, which also handle network traffic but do not specifically provide entrance into another network.

Explanations: A gateway is a device or software application that serves as an entrance point from one network to another. It is used to connect networks that use different protocols, making it a crucial component for inter-network communication. This function distinguishes it from other network devices like nodes, switches, and routers, which primarily manage traffic within a single network or between similar networks.

Option Analysis:

Option A: A node is any device connected to a network, but it does not specifically provide entrance into another network.
Option B: A gateway is the correct term for a network point that provides entrance into another network.
Option C: A switch is a device that connects multiple devices on a single network, but it does not provide entrance into another network.
Option D: A router is a device that directs data between networks, but it is not specifically defined as providing entrance into another network.

Mnemonic: GATE - Gateway Acts as a Transition Entrance

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Computer networking MCQ - Set 96

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