Computer Networks Exam Practice Questions | Generated by AI

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Here are 30 multiple-choice exam questions for Computer Networks Technology (02141) tailored for the National Higher Education Self-study Examination (Guangdong). The questions cover foundational and applied concepts in computer networking.

Section 1: Network Basics

  1. Which of the following best describes the primary function of a router in a network?
    • Connects multiple networks and forwards data packets between them
    • Provides wireless connectivity to end devices
    • Stores and manages network configuration files
    • Encrypts data for secure transmission
  2. The OSI model consists of how many layers?
    • 5
    • 7
    • 9
    • 11
  3. Which layer of the OSI model is responsible for end-to-end communication and error recovery?
    • Physical Layer
    • Data Link Layer
    • Transport Layer
    • Application Layer
  4. What is the purpose of the MAC address in a network?
    • Identifies the physical location of a device
    • Uniquely identifies a network interface card (NIC)
    • Encrypts data packets for secure transmission
    • Assigns IP addresses to devices

Section 2: Network Protocols

  1. Which protocol is used for sending email messages between servers?
    • HTTP
    • SMTP
    • FTP
    • DNS
  2. What does the acronym TCP stand for?
    • Transmission Control Protocol
    • Transfer Control Process
    • Transport Control Protocol
    • Technical Communication Protocol
  3. Which protocol is responsible for translating domain names into IP addresses?
    • ARP
    • DNS
    • ICMP
    • DHCP
  4. What is the primary function of the HTTP protocol?
    • Transfers files between a client and a server
    • Enables secure communication over a computer network
    • Facilitates the transfer of web pages from a server to a client
    • Manages network traffic and congestion

Section 3: Network Topologies and Devices

  1. Which network topology connects all devices to a central hub?
    • Bus
    • Star
    • Ring
    • Mesh
  2. What is the main advantage of a mesh network topology?
    • Low cost of implementation
    • High fault tolerance and redundancy
    • Easy to install and manage
    • Limited to small-scale networks
  3. Which device is used to amplify or regenerate signals in a network?
    • Switch
    • Router
    • Repeater
    • Gateway
  4. What is the primary function of a switch in a local area network (LAN)?
    • Connects multiple networks and routes data between them
    • Filters and forwards data packets based on MAC addresses
    • Converts digital signals to analog signals for transmission
    • Assigns IP addresses to devices on the network

Section 4: IP Addressing and Subnetting

  1. What is the purpose of subnetting in a network?
    • Increases the number of available IP addresses
    • Reduces network congestion by dividing a network into smaller segments
    • Encrypts data for secure transmission
    • Assigns unique MAC addresses to devices
  2. Which class of IP address is reserved for multicast groups?
    • Class A
    • Class B
    • Class C
    • Class D
  3. What is the default subnet mask for a Class C IP address?
    • 255.0.0.0
    • 255.255.0.0
    • 255.255.255.0
    • 255.255.255.255
  4. What does the term “NAT” stand for in networking?
    • Network Address Translation
    • Network Access Terminal
    • Node Address Table
    • Network Authentication Token

Section 5: Network Security

  1. What is the primary purpose of a firewall in a network?
    • Encrypts data for secure transmission
    • Monitors and controls incoming and outgoing network traffic
    • Assigns IP addresses to devices
    • Manages network bandwidth and congestion
  2. Which of the following is a common method for securing data transmitted over a network?
    • MAC filtering
    • Data compression
    • Encryption
    • Packet fragmentation
  3. What is a “VPN” used for in a network?
    • Increases the speed of data transmission
    • Provides a secure connection over a public network
    • Assigns IP addresses to devices
    • Manages network traffic and congestion
  4. Which of the following is an example of a symmetric encryption algorithm?
    • RSA
    • AES
    • Diffie-Hellman
    • ECC

Section 6: Wireless Networking

  1. Which wireless networking standard operates at 2.4 GHz and 5 GHz frequencies?
    • Bluetooth
    • WiMAX
    • Wi-Fi (802.11)
    • Zigbee
  2. What is the primary function of a wireless access point (WAP)?
    • Connects wireless devices to a wired network
    • Encrypts data for secure transmission
    • Assigns IP addresses to devices
    • Manages network traffic and congestion
  3. Which security protocol is commonly used to secure wireless networks?
    • WPA2
    • HTTP
    • FTP
    • SMTP

Section 7: Network Troubleshooting

  1. Which command is used to test the connectivity between two devices on a network?
    • ipconfig
    • ping
    • traceroute
    • netstat
  2. What does the “traceroute” command do?
    • Displays the route packets take to reach a destination
    • Assigns IP addresses to devices
    • Encrypts data for secure transmission
    • Monitors network bandwidth and congestion
  3. Which tool is used to display the routing table on a Windows system?
    • ipconfig
    • route print
    • netstat
    • ping

Section 8: Emerging Technologies

  1. What is the primary advantage of Software-Defined Networking (SDN)?
    • Increases the cost of network management
    • Centralizes network control and management
    • Reduces network security
    • Limits network scalability
  2. Which technology enables devices to connect and communicate over the internet without human intervention?
    • Cloud Computing
    • Internet of Things (IoT)
    • Virtual Reality
    • Blockchain
  3. What is the purpose of a Content Delivery Network (CDN)?
    • Encrypts data for secure transmission
    • Distributes content to users based on their geographic location
    • Assigns IP addresses to devices
    • Manages network traffic and congestion
  4. Which of the following is a characteristic of 5G networks?
    • Lower data transmission speeds compared to 4G
    • Higher latency for real-time applications
    • Increased capacity and reduced latency
    • Limited to wired connections only
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