OA Exams

  • California, TX 70240
  • Info@gmail.com
  • Office Hours: 8:00 AM – 7:45 PM
  • web.groovymark@gmail.com
  • November 18, 2024

Question 21

What is the primary function of a proxy server?

a) To assign dynamic IP addresses
b) To filter and cache requests between clients and servers
c) To route data between different networks
d) To amplify wireless network signals

Correct Answer: b) To filter and cache requests between clients and servers

Explanation: A proxy server acts as an intermediary between clients and servers, filtering and caching requests to improve security and performance.

Question 22

What is the purpose of the OSI model in networking?

a) To provide a framework for assigning IP addresses
b) To define a standard for how different networking protocols communicate
c) To manage VLAN traffic across a network
d) To encrypt data for secure transmission

Correct Answer: b) To define a standard for how different networking protocols communicate

Explanation: The OSI model provides a standard framework for how networking protocols interact and communicate, breaking down the communication process into seven distinct layers.

Question 23

What is the function of a DHCP server in a network?

a) To assign dynamic IP addresses to devices
b) To filter incoming and outgoing traffic
c) To provide encrypted communications between devices
d) To route data between different networks

Correct Answer: a) To assign dynamic IP addresses to devices

Explanation: A DHCP server automatically assigns dynamic IP addresses to devices on a network, simplifying the process of network configuration.

Question 24

Which protocol is used to securely transfer files between computers over a network?

a) FTP
b) HTTP
c) SFTP
d) DNS

Correct Answer: c) SFTP

Explanation: SFTP (Secure File Transfer Protocol) provides a secure way to transfer files between computers by encrypting both the command and data.

Question 25

What does a MAC filter do in a wireless network?

a) Encrypts wireless traffic for secure transmission
b) Assigns IP addresses based on the MAC address
c) Restricts or allows access based on the MAC address of a device
d) Amplifies wireless signals for better coverage

Correct Answer: c) Restricts or allows access based on the MAC address of a device

Explanation: A MAC filter controls access to a wireless network by allowing or blocking devices based on their MAC addresses, improving security.

Question 26

What does a RAID 1 configuration provide?

a) Faster read and write speeds
b) Data redundancy through mirroring
c) Dynamic IP assignment
d) VLAN traffic management

Correct Answer: b) Data redundancy through mirroring

Explanation: RAID 1 provides data redundancy by mirroring the same data on two or more hard drives, ensuring that data is protected in the event of a hardware failure.

Question 27

What is the purpose of a DMZ (Demilitarized Zone) in network security?

a) To assign dynamic IP addresses
b) To act as a buffer zone between public and private networks
c) To encrypt all incoming and outgoing network traffic
d) To store backup data for redundancy

Correct Answer: b) To act as a buffer zone between public and private networks

Explanation: A DMZ is a section of a network that contains public-facing resources like web servers, isolating them from the private network to reduce security risks.

Question 28

What is the difference between full-duplex and half-duplex communication?

a) Full-duplex allows communication in both directions simultaneously, while half-duplex only allows communication in one direction at a time
b) Full-duplex amplifies signals, while half-duplex does not
c) Full-duplex is used for wireless communication, while half-duplex is used for wired communication
d) Full-duplex encrypts data, while half-duplex does not

Correct Answer: a) Full-duplex allows communication in both directions simultaneously, while half-duplex only allows communication in one direction at a time

Explanation: Full-duplex communication allows data to be sent and received simultaneously, whereas half-duplex only allows data to be sent in one direction at a time.

Question 29

What is the primary function of a load balancer in a network?

a) To amplify weak network signals
b) To distribute network traffic evenly across multiple servers
c) To encrypt data transmissions for security
d) To resolve hostnames to IP addresses

Correct Answer: b) To distribute network traffic evenly across multiple servers

Explanation: A load balancer distributes incoming network traffic across multiple servers, ensuring efficient use of resources and preventing server overloads.

Question 30

What does a VLAN (Virtual Local Area Network) allow you to do?

a) Encrypt data for secure transmission
b) Segment a network logically without physical separation
c) Assign dynamic IP addresses to devices
d) Amplify network signals over long distances

Correct Answer: b) Segment a network logically without physical separation

Explanation: A VLAN allows network administrators to logically segment a network, improving traffic management and security without needing separate physical networks.

Question 31

What is the function of the presentation layer in the OSI model?

a) To route data between networks
b) To format and encrypt data for application-level communication
c) To assign IP addresses to devices
d) To manage physical connections between devices

Correct Answer: b) To format and encrypt data for application-level communication

Explanation: The presentation layer (Layer 6) is responsible for data formatting, encryption, and compression, ensuring data is properly prepared for transmission between applications.

Question 32

Which type of cable is typically used for long-distance communication in a network?

a) Twisted-pair cable
b) Coaxial cable
c) Fiber-optic cable
d) USB cable

Correct Answer: c) Fiber-optic cable

Explanation: Fiber-optic cables are commonly used for long-distance communication due to their high bandwidth capacity and resistance to electromagnetic interference.

Question 33

What does the acronym FTP stand for?

a) File Transfer Protocol
b) Fast Transmission Process
c) Fiber Transmission Protocol
d) Frame Transfer Protocol

Correct Answer: a) File Transfer Protocol

Explanation: FTP (File Transfer Protocol) is a standard network protocol used for transferring files between computers over a network.

Question 34

What is the purpose of a subnet mask in IP addressing?

a) To encrypt data transmissions
b) To divide an IP address into network and host portions
c) To filter traffic based on MAC addresses
d) To manage VLAN traffic

Correct Answer: b) To divide an IP address into network and host portions

Explanation: A subnet mask helps identify which part of an IP address belongs to the network and which part identifies the host, aiding in network segmentation.

Question 35

What is a “honey pot” in network security?

a) A backup system for storing data
b) A network device used to amplify signals
c) A decoy system designed to attract and monitor attackers
d) A method of encrypting sensitive data

Correct Answer: c) A decoy system designed to attract and monitor attackers

Explanation: A honey pot is a security mechanism that acts as a decoy system, attracting attackers to observe their methods without risking actual network assets.

Question 36

What is the purpose of a VPN (Virtual Private Network)?

a) To route data between different networks
b) To create a secure, encrypted connection over a public network
c) To assign dynamic IP addresses to devices
d) To resolve domain names to IP addresses

Correct Answer: b) To create a secure, encrypted connection over a public network

Explanation: A VPN allows users to establish secure, encrypted connections over public networks like the internet, ensuring that sensitive data is protected during transmission.

Question 37

What is the main function of the transport layer in the OSI model?

a) To manage physical network connections
b) To ensure reliable data transmission and error correction
c) To encrypt data for secure communication
d) To route data packets between different networks

Correct Answer: b) To ensure reliable data transmission and error correction

Explanation: The transport layer (Layer 4) is responsible for ensuring that data is transmitted reliably, handling error correction, flow control, and packet sequencing.

Question 38

What is a multicast address used for in networking?

a) To send data to multiple recipients simultaneously
b) To send data to a single recipient
c) To encrypt network traffic for secure transmission
d) To route data between different networks

Correct Answer: a) To send data to multiple recipients simultaneously

Explanation: A multicast address is used to deliver data to multiple devices simultaneously, commonly used for video streaming and other real-time applications.

Question 39

What does the acronym IMAP stand for?

a) Internet Messaging and Access Protocol
b) Integrated Mail Application Protocol
c) Internet Mail Access Protocol
d) Intranet Messaging Application Protocol

Correct Answer: c) Internet Mail Access Protocol

Explanation: IMAP (Internet Mail Access Protocol) is used to retrieve and manage email messages from a mail server, allowing synchronization across devices.

Question 40

What is the purpose of a network switch?

a) To route data between different networks
b) To filter and forward data based on MAC addresses
c) To assign dynamic IP addresses to devices
d) To amplify weak network signals

Correct Answer: b) To filter and forward data based on MAC addresses

Explanation: A switch operates at Layer 2 of the OSI model, using MAC addresses to filter and forward data to the appropriate destination within a local network.

Complete the Captcha to view next question set.

Prev Post
WGU D413 Practice Exam Questions – Set 4 – Part 1
Next Post
WGU D413 Practice Exam Questions – Set 4 – Part 3