Computer networking MCQ – Change your future

851. In which network will cable failure cause more disruption to service?

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

Exam Relevance: Computer Networks, Data Communication, Network Fundamentals

Difficulty: Moderate

Concept notes: In a bus network, all devices are connected to a single cable, and a failure in this cable can disrupt communication for all devices. In contrast, a star network has a central hub, and a cable failure typically only affects the device connected to that cable.

Common Mistakes: Students may mistakenly believe that a star network is more susceptible to cable failures because it has more cables. However, in a star network, a single cable failure only affects one device.

Explanations: In a bus network, all devices share a single communication line. If this line fails, communication is disrupted for all devices on the network. In a star network, each device is connected to a central hub via its own cable. If one of these cables fails, only the device connected to that cable is affected, while the rest of the network continues to function.

Option Analysis:

Option A: Correct. A bus network's single cable failure can disrupt service for all devices.
Option B: Incorrect. A star network's cable failure typically only affects one device.
Option C: Incorrect. The impact of cable failure is not the same for both network types.
Option D: Incorrect. Cable failure can indeed cause disruption in both network types, but the extent varies.

Mnemonic: Bus = Big Single Wire, Star = Separate Wires

852. SMTP stands for.....

Correct Answer: Correct answer is: (C) Simple Mail Transfer Protocol.

Exam Relevance: AP Computer Science, CompTIA A+, CCNA

Difficulty: Easy

Concept notes: SMTP is a protocol used for sending email messages between servers.

Common Mistakes: Students may confuse SMTP with other protocols like POP3 or IMAP, which are used for receiving emails.

Explanations: SMTP stands for Simple Mail Transfer Protocol. It is a standard protocol for sending email messages between servers. The term "Simple" in SMTP refers to the straightforward nature of the protocol, which is designed to be easy to implement and use for transferring email messages over the internet.

Option Analysis:

Option A: Incorrect, as there is no such term as "Service Message Transmission Permission" in the context of email protocols.
Option B: Incorrect, as "Secure Message Transfer Protocol" is not a recognized term for email protocols. The term "secure" is often associated with SSL/TLS encryption, but not as a standalone protocol name.
Option C: Correct, as SMTP stands for Simple Mail Transfer Protocol, which is the standard protocol for sending email messages between servers.
Option D: Incorrect, as "Simple Message Transfer Protocol" is close but not the correct term. The correct term is "Simple Mail Transfer Protocol."

853. ARP (Address Resolution Protocol) is

Correct Answer: Correct answer is: (A) A TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: ARP (Address Resolution Protocol) is a fundamental protocol in TCP/IP networks that maps IP addresses to physical hardware addresses (MAC addresses).

Common Mistakes: Students often confuse ARP with other protocols like FTP or ICMP, which have different functions.

Explanations: ARP is a protocol that operates at the data link layer of the OSI model. It is used to resolve IP addresses to MAC addresses, which are necessary for communication on a local network. When a device needs to send data to another device on the same network, it uses ARP to find the MAC address associated with the destination IP address. This process is essential for the proper functioning of TCP/IP networks.

Option Analysis:

Option A: Correct. ARP is indeed a TCP/IP protocol that dynamically binds IP addresses to MAC addresses.
Option B: Incorrect. FTP (File Transfer Protocol) is used for transferring files, not for address resolution.
Option C: Incorrect. ARP is not used for monitoring computers; it is used for address resolution.
Option D: Incorrect. ICMP (Internet Control Message Protocol) handles error and control messages, not address resolution.

Mnemonic: ARP: Address Resolution Protocol

854. Communication in traditional cable TV network is

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

Exam Relevance: Networking exams, Telecommunications exams, Information Technology exams

Difficulty: Easy

Concept notes: Traditional cable TV networks transmit signals from a central source to multiple subscribers, allowing for one-way communication.

Common Mistakes: Students may confuse cable TV networks with modern interactive services that support bidirectional communication.

Explanations: In traditional cable TV networks, communication is unidirectional because the signal flows from the cable provider to the subscribers. There is no mechanism for the subscribers to send information back to the provider through the same channel.

Option Analysis:

Option A: Incorrect, as cable TV networks do not support bidirectional communication in traditional setups.
Option B: Correct, as traditional cable TV networks only allow signals to flow from the provider to the subscribers.
Option C: Incorrect, as omnidirectional communication implies signals can be sent in all directions, which is not applicable to cable TV networks.
Option D: Incorrect, as the correct answer is explicitly provided.

855. What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?

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

Exam Relevance: AP Computer Science Principles, A+ Certification, CompTIA Network+

Difficulty: Easy

Concept notes: Handshaking is the process of establishing a connection between two devices, such as modems, by exchanging control signals.

Common Mistakes: Students may confuse handshaking with other communication protocols or think it refers to the physical connection itself.

Explanations: Handshaking is the correct term for the exchange of control signals necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end. This process ensures that both devices are ready to communicate and can synchronize their operations.

Option Analysis:

Option A: Correct. Handshaking is the process of exchanging control signals to establish a connection.
Option B: Incorrect. Modem options refer to the settings and configurations of a modem, not the process of establishing a connection.
Option C: Incorrect. Protocol refers to a set of rules governing communication, not the initial exchange of control signals.
Option D: Incorrect. Duplexing refers to the ability of a communication channel to carry signals in both directions simultaneously, not the process of establishing a connection.

Mnemonic: Handshake to connect, like a greeting.

856. Protocol that deals with Xerox protocol data packets are called

Correct Answer: Correct answer is: (A) Xerox Control Protocol.

Exam Relevance: Networking exams, Computer Science exams, IT certification exams

Difficulty: Easy

Concept notes: The Xerox Control Protocol is specifically designed to handle Xerox protocol data packets.

Common Mistakes: Students may confuse the Xerox Control Protocol with other network control protocols, such as the Internet Protocol Control Protocol (IPCP) or OSI Network Layer Control Protocol.

Explanations: The Xerox Control Protocol is the correct answer because it is specifically designed to manage and control the transmission of Xerox protocol data packets. This protocol is tailored to the unique requirements of Xerox networking, ensuring proper handling and transmission of data.

Option Analysis:

Option A: Correct, as it is the protocol designed for Xerox protocol data packets.
Option B: Incorrect, as IPCP is related to the Internet Protocol and not Xerox protocol data packets.
Option C: Incorrect, as the OSI Network Layer Control Protocol is not specific to Xerox protocol data packets.
Option D: Incorrect, as AppleTalk is a proprietary networking protocol suite developed by Apple and not related to Xerox protocol data packets.

Mnemonic: XCP for Xerox

857. Communication medium which requires line-of-sight is

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

Exam Relevance: GATE, GRE, ECE Competitive Exams

Difficulty: Easy

Concept notes: Microwaves require a direct line-of-sight path between the transmitter and receiver to function effectively.

Common Mistakes: Students may confuse microwave communication with other wireless technologies that do not require line-of-sight, such as radio waves.

Explanations: Microwaves operate at high frequencies and have a straight-line propagation path. They cannot bend around obstacles, thus requiring a clear line-of-sight between the transmitter and receiver. This is why microwave communication is often used in point-to-point links and satellite communications.

Option Analysis:

Option A: Microwave communication requires line-of-sight for effective transmission.
Option B: Fiber optic cable uses light to transmit data through a glass or plastic fiber, not requiring line-of-sight.
Option C: Twisted pair cable is a type of copper wire used for wired communication and does not require line-of-sight.
Option D: Coaxial cable is also a wired medium and does not require line-of-sight for data transmission.

Mnemonic: Line-of-Sight: M for Microwave

858. What is the size of the IP version 4?

Correct Answer: Correct answer is: (B) 32 bits.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: The size of an IP version 4 address is 32 bits.

Common Mistakes: Students may confuse the size of an IP address with the size of an IP packet or the number of bytes in an IP address.

Explanations: An IP version 4 address is a 32-bit number. This means it consists of 32 binary digits (bits). The 32 bits are often represented in dotted decimal notation, which divides the address into four 8-bit octets, each ranging from 0 to 255. Therefore, the correct size of an IP version 4 address is 32 bits.

Option Analysis:

Option A: 22 bytes is incorrect because an IP version 4 address is not measured in bytes but in bits.
Option B: 32 bits is the correct size of an IP version 4 address.
Option C: 32 bytes is incorrect because an IP version 4 address is 32 bits, not 32 bytes.
Option D: 99 bytes is incorrect and unrelated to the size of an IP version 4 address.

859. Which is not true?

Correct Answer: Correct answer is: (D) DNS used by administrator to manage the internet.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: DNS (Domain Name System) is a hierarchical and distributed naming system for computers, services, or other resources connected to the Internet or a private network. It translates domain names into IP addresses and vice versa.

Common Mistakes: Students often misunderstand the role of DNS, thinking it is used by administrators to manage the entire internet, rather than just translating domain names to IP addresses.

Explanations: DNS is primarily used for translating domain names into IP addresses and vice versa, not for managing the internet. The other options (HTTP, SMTP, FTP) are correctly described in their roles within the internet infrastructure.

Option Analysis:

Option A: HTTP (Hypertext Transfer Protocol) is indeed a vehicle for accessing the World Wide Web, facilitating communication between web browsers and web servers.
Option B: SMTP (Simple Mail Transfer Protocol) is the main protocol used for sending email messages between servers.
Option C: FTP (File Transfer Protocol) is used for transferring files from one host to another over a TCP-based network.
Option D: DNS (Domain Name System) is not used by administrators to manage the internet; it is used for translating domain names into IP addresses.

Mnemonic: DNS: Domain Name System, not Internet Manager

860. In the URL: http://www.britishschool.br/learning/timetable.pdf which part is the domain?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: The domain in a URL is the part that identifies the specific website or server. It is typically the name of the organization or entity that owns the website.

Common Mistakes: Students may confuse the domain with other parts of the URL, such as the protocol (http://) or the file path (timetable.pdf).

Explanations: In the URL http://www.britishschool.br/learning/timetable.pdf, the domain is "britishschool.br". The "www" is a subdomain, and "britishschool" is the main part of the domain. The ".br" is the top-level domain indicating the country (Brazil).

Option Analysis:

Option A: Correct. "Britishschool" is part of the domain.
Option B: Incorrect. "Http://" is the protocol, not the domain.
Option C: Incorrect. "Learning" is a directory or path, not the domain.
Option D: Incorrect. "Timetable.pdf" is the file name, not the domain.

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Computer networking MCQ - Set 86

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