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web.groovymark@gmail.com
- November 18, 2024
Question 41
What does a Trojan horse do in network security?
a) It encrypts data to prevent unauthorized access
b) It disguises itself as a legitimate program to gain access to a system
c) It floods a network with excessive traffic to cause disruption
d) It intercepts network traffic to steal data
Correct Answer: b) It disguises itself as a legitimate program to gain access to a system
Explanation: A Trojan horse is malware that appears to be a legitimate program but contains malicious code that can harm or compromise a system.
Question 42
Which of the following protocols is designed for streaming audio and video in real-time?
a) FTP
b) RTP
c) IMAP
d) SMTP
Correct Answer: b) RTP
Explanation: Real-Time Transport Protocol (RTP) is designed to deliver audio and video data in real-time over IP networks.
Question 43
What is the primary function of NAT (Network Address Translation)?
a) To resolve domain names to IP addresses
b) To allow devices with private IP addresses to access public networks
c) To assign IP addresses dynamically to devices
d) To encrypt network traffic for secure communication
Correct Answer: b) To allow devices with private IP addresses to access public networks
Explanation: NAT allows devices on a private network to access public networks like the internet by translating private IP addresses into public ones.
Question 44
What does the acronym VPN stand for in networking?
a) Virtual Port Number
b) Virtual Packet Node
c) Virtual Private Network
d) Virtual Protocol Network
Correct Answer: c) Virtual Private Network
Explanation: A Virtual Private Network (VPN) creates a secure, encrypted connection over a public network, allowing users to access private resources remotely.
Question 45
What is the purpose of Kerberos in network security?
a) To filter network traffic based on MAC addresses
b) To encrypt data transmissions for secure communication
c) To authenticate users and devices on a network
d) To assign dynamic IP addresses to devices
Correct Answer: c) To authenticate users and devices on a network
Explanation: Kerberos is a network authentication protocol that securely verifies the identity of users and devices on a network.
Question 46
What is the primary function of the physical layer in the OSI model?
a) To handle logical addressing and routing
b) To manage encryption and data formatting
c) To transmit raw data over a physical medium
d) To ensure reliable data transfer between devices
Correct Answer: c) To transmit raw data over a physical medium
Explanation: The physical layer (Layer 1) is responsible for transmitting raw data bits over a physical medium, such as cables or wireless signals.
Question 47
Which device is commonly used to connect multiple networks together?
a) Switch
b) Hub
c) Router
d) Repeater
Correct Answer: c) Router
Explanation: A router connects multiple networks together and directs data traffic between them based on IP addresses, ensuring efficient communication.
Question 48
What is the purpose of a “hot spare” in network hardware?
a) A backup device that automatically replaces a failed component without human intervention
b) A backup device that is stored and used only when needed
c) A device used to amplify network signals
d) A switch that is used to connect wireless devices to a network
Correct Answer: a) A backup device that automatically replaces a failed component without human intervention
Explanation: A hot spare is a backup device that is always powered on and can automatically replace a failed system component without requiring manual intervention.
Question 49
Which protocol is used for downloading email messages to a client?
a) IMAP
b) SMTP
c) FTP
d) HTTP
Correct Answer: a) IMAP
Explanation: IMAP (Internet Message Access Protocol) allows email clients to download and synchronize messages from a mail server.
Question 50
What does the term “jitter” refer to in network performance?
a) A delay in the transmission of data packets
b) Variability in the timing of packet delivery
c) Loss of signal strength over a network
d) The encryption of data packets for security
Correct Answer: b) Variability in the timing of packet delivery
Explanation: Jitter refers to small variations in the timing of data packet delivery, which can cause disruptions in the quality of real-time communications like voice and video.
