Computer networking MCQ – Change your future

131. Original Ethernet has gone through

Correct Answer: Correct answer is: (D) Four generations.

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

Difficulty: Moderate

Concept notes: Ethernet has evolved through multiple generations, each offering improvements in speed and technology.

Common Mistakes: Students may confuse the number of generations with the number of standards or protocols within each generation.

Explanations: Ethernet has gone through four generations of development. The first generation was the original 10BASE5 and 10BASE2 standards, followed by the second generation with 10BASE-T and 100BASE-TX. The third generation introduced Gigabit Ethernet (1000BASE-T), and the fourth generation includes 10 Gigabit Ethernet and beyond. Each generation represents a significant leap in data transmission speeds and technological advancements.

Option Analysis:

Option A: Incorrect, as Ethernet has evolved beyond a single generation.
Option B: Incorrect, as there are more than two generations of Ethernet.
Option C: Incorrect, as there are more than three generations of Ethernet.
Option D: Correct, as Ethernet has gone through four generations of development.

132. A device operation at the physical layer is called a

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

Exam Relevance: Networking Fundamentals, CCNA, CISSP

Difficulty: Easy

Concept notes: A repeater is a device that operates at the physical layer of the OSI model. It amplifies or regenerates the signal to extend the distance over which data can be transmitted.

Common Mistakes: Students may confuse repeaters with other devices like bridges or routers, which operate at higher layers of the OSI model.

Explanations: A repeater operates at the physical layer, which is the lowest layer of the OSI model. It is responsible for amplifying or regenerating the signal to maintain its integrity over long distances. This function is specific to the physical layer, making the repeater the correct answer.

Option Analysis:

Option A: A bridge operates at the data link layer, not the physical layer.
Option B: A router operates at the network layer, not the physical layer.
Option C: A repeater operates at the physical layer, which is correct.
Option D: This option is incorrect as a repeater is the correct device operating at the physical layer.

133. A datagram is a variable-length packet consisting of two parts those are

Correct Answer: Correct answer is: (D) Header and data.

Exam Relevance: Computer Networks, Data Communications, Network Fundamentals

Difficulty: Easy

Concept notes: A datagram is a self-contained, independent entity of variable length that includes sufficient addressing information and no connection state information to allow it to be transmitted over a network.

Common Mistakes: Students may confuse the components of a datagram with other network protocols or packet structures, such as TCP segments or frames.

Explanations: A datagram consists of two main parts: the header and the data. The header contains control information, such as source and destination addresses, while the data section carries the actual payload or message. This structure allows datagrams to be transmitted independently over a network without requiring a pre-established connection.

Option Analysis:

Option A: Data and socket address is incorrect because a datagram does not specifically include a socket address. Socket addresses are used in connection-oriented protocols like TCP.
Option B: IP address and data is incorrect because while IP addresses are part of the header, the datagram is not defined solely by these two components.
Option C: Data and destination is incorrect because the destination address is part of the header, not a separate component.
Option D: Header and data is correct because these are the two main components of a datagram.

134. To set up a bulletin board system you need

Correct Answer: Correct answer is: (D) All of the above.

Exam Relevance: IT Essentials, CompTIA A+, Network+

Difficulty: Easy

Concept notes: A bulletin board system (BBS) requires a smart modem with auto-answer capabilities, a telephone line, and a personal computer to function properly.

Common Mistakes: Students might overlook the necessity of a smart modem with auto-answer capabilities, thinking a regular modem would suffice.

Explanations: A bulletin board system (BBS) is a computer system that allows users to connect over a telephone line using a modem. The smart modem with auto-answer capabilities is necessary to automatically respond to incoming calls. A telephone line is required to establish the connection between the BBS and the user's computer. A personal computer is needed to run the BBS software and manage the system. Therefore, all of the above components are essential for setting up a BBS.

Option Analysis:

Option A: A smart modem with auto-answer capabilities is necessary for the BBS to automatically respond to incoming calls.
Option B: A telephone line is required to establish the connection between the BBS and the user's computer.
Option C: A personal computer is needed to run the BBS software and manage the system.
Option D: All of the above components are essential for setting up a BBS.

Mnemonic: SMART: Smart Modem, Auto-Answer, Required Telephone, Computer

135. IPv6 has a larger address space of

Correct Answer: Correct answer is: (B) 2*128.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: IPv6 addresses are 128 bits long, providing a significantly larger address space compared to IPv4.

Common Mistakes: Students often confuse the address space of IPv6 with IPv4, which is 2*32.

Explanations: IPv6 addresses are 128 bits in length, which means the total number of unique addresses is 2 raised to the power of 128. This large address space is represented as 2*128.

Option Analysis:

Option A: 2*16 is incorrect because it represents a much smaller address space than IPv6.
Option B: 2*128 is correct as it accurately represents the address space of IPv6.
Option C: 2*32 is incorrect because it represents the address space of IPv4, not IPv6.
Option D: 2*8 is incorrect because it represents an even smaller address space than IPv4.

136. TCP is a.....protocol.

Correct Answer: Correct answer is: (A) Stream-oriented.

Exam Relevance: Computer Networks, CCNA, CISSP

Difficulty: Easy

Concept notes: TCP (Transmission Control Protocol) is designed to handle data as a continuous stream of bytes, rather than as discrete messages or blocks.

Common Mistakes: Students may confuse TCP with UDP (User Datagram Protocol), which is message-oriented.

Explanations: TCP is stream-oriented because it ensures that data is transmitted in a reliable, ordered, and error-checked manner. It does not preserve message boundaries, meaning that data is treated as a continuous stream of bytes. This stream-oriented nature allows TCP to handle data efficiently and reliably over a network.

Option Analysis:

Option A: Correct. TCP is stream-oriented, treating data as a continuous stream of bytes.
Option B: Incorrect. TCP does not preserve message boundaries, so it is not message-oriented.
Option C: Incorrect. TCP does not handle data in discrete blocks, so it is not block-oriented.
Option D: Incorrect. The correct answer is provided in option A.

Mnemonic: Stream-Oriented: Think "Stream" for "TCP" - Continuous flow.

137. Which protocol will be used to automate the IP configuration mechanism which includes IP address, subnet mask, default gateway, and DNS information?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: DHCP (Dynamic Host Configuration Protocol) is used to automate the configuration of IP addresses and related network settings.

Common Mistakes: Students may confuse DHCP with other protocols like SMTP, which is used for email, or ARP, which is used for mapping IP addresses to MAC addresses.

Explanations: DHCP is the protocol designed to automate the IP configuration mechanism, including the assignment of IP addresses, subnet masks, default gateways, and DNS information. This protocol simplifies network administration by automatically configuring these settings on devices as they connect to the network.

Option Analysis:

Option A: SMTP is used for sending and receiving emails, not for IP configuration.
Option B: DHCP is the correct protocol for automating IP configuration.
Option C: ARP is used to map IP addresses to MAC addresses, not for IP configuration.
Option D: TCP/IP is a suite of protocols for communication over the internet, not a specific protocol for IP configuration.

138. ..... is an example for public key algorithm.

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

Exam Relevance: CISSP, CompTIA Security+, CCNA Security

Difficulty: Easy

Concept notes: RSA is a public key algorithm used for secure data transmission.

Common Mistakes: Students may confuse RSA with symmetric key algorithms like DES or RC5, which are not public key algorithms.

Explanations: RSA is a public key algorithm, which means it uses a pair of keys: a public key for encryption and a private key for decryption. This is in contrast to symmetric key algorithms like DES and RC5, which use the same key for both encryption and decryption. Therefore, RSA is the correct example of a public key algorithm.

Option Analysis:

Option A: RSA is a public key algorithm.
Option B: DES is a symmetric key algorithm.
Option C: IREA is not a recognized cryptographic algorithm.
Option D: RC5 is a symmetric key algorithm.

Mnemonic: RSA: Reliable Secure Algorithm

139. MIME stands for

Correct Answer: Correct answer is: (A) Multipurpose Internet Mail Extensions.

Exam Relevance: AP Computer Science Principles, SAT Subject Test in Computer Science, CompTIA Network+

Difficulty: Easy

Concept notes: MIME stands for Multipurpose Internet Mail Extensions. It is a standard that extends the capabilities of email by enabling the transmission of various types of data, such as text, images, and audio, over the internet.

Common Mistakes: Students may confuse MIME with other acronyms that start with "M" and relate to internet communication, such as MIMIC or MIME types.

Explanations: MIME is a standard that allows for the transmission of different types of data over the internet, particularly in email. The acronym stands for Multipurpose Internet Mail Extensions, which accurately describes its function in extending the capabilities of email to handle various data types.

Option Analysis:

Option A: Correct. MIME stands for Multipurpose Internet Mail Extensions.
Option B: Incorrect. "Multipurpose Internet Mail Email" is not a valid term.
Option C: Incorrect. "Multipurpose International Mail Entity" is not a valid term.
Option D: Incorrect. "Multipurpose International Mail End" is not a valid term.

Mnemonic: MIME: Mail, Images, Music, Everything

140. What term refers to the cords that are used to make network connections to a rack in a wiring closet?

Correct Answer: Correct answer is: (A) Patch cables.

Exam Relevance: CompTIA Network+, Cisco CCNA, ITIL Foundation

Difficulty: Easy

Concept notes: Patch cables are used to connect devices within a local area network (LAN), such as connecting a computer to a switch or router in a wiring closet.

Common Mistakes: Students may confuse patch cables with other types of cables, such as power cables or fiber optic cables, which serve different purposes.

Explanations: Patch cables are specifically designed for short-distance connections within a network, such as connecting devices in a wiring closet. They are commonly used to establish connections between network devices like switches, routers, and computers. Power cables are used for electrical power supply, fiber optic cables are used for high-speed data transmission over long distances, and RJ-11 cables are used for telephone connections.

Option Analysis:

Option A: Correct. Patch cables are used for network connections within a wiring closet.
Option B: Incorrect. Power cables are used for electrical power supply, not network connections.
Option C: Incorrect. Fiber optic cables are used for high-speed data transmission over long distances, not for short-distance connections in a wiring closet.
Option D: Incorrect. RJ-11 cables are used for telephone connections, not network connections.

Mnemonic: Patch for Patch, Power for Power, Fiber for Far, RJ-11 for Phone.

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Computer networking MCQ - Set 14

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