Computer Knowledge

Computer Networks

2,461 Questions

Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.

OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands

Computer Networks Questions

Multiple choice

What is the purpose of the DNS protocol in mobile device connectivity?

  1. To translate domain names into IP addresses

  2. To establish a connection between two devices

  3. To ensure reliable data transmission

  4. To encrypt data
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The DNS (Domain Name System) protocol is responsible for translating domain names into IP addresses. This allows users to access websites and online services by using easy-to-remember domain names instead of complex IP addresses.

Multiple choice

What is the purpose of the DHCP protocol in mobile device connectivity?

  1. To assign IP addresses to devices

  2. To establish a connection between two devices

  3. To ensure reliable data transmission

  4. To encrypt data
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The DHCP (Dynamic Host Configuration Protocol) protocol is responsible for assigning IP addresses to devices on a network. This allows devices to communicate with each other and access the internet.

Multiple choice

What is the purpose of the HTTP protocol in mobile device connectivity?

  1. To transfer data between a web server and a web browser

  2. To establish a connection between two devices

  3. To ensure reliable data transmission

  4. To encrypt data
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The HTTP (Hypertext Transfer Protocol) protocol is responsible for transferring data between a web server and a web browser. This allows users to access websites and online services.

Multiple choice

Which network protocol is responsible for establishing and maintaining connections between devices on a network?

  1. TCP

  2. UDP

  3. HTTP

  4. FTP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

TCP (Transmission Control Protocol) is a connection-oriented protocol that establishes a reliable connection between two devices on a network, ensuring the reliable delivery of data packets.

Multiple choice

What is the primary function of a network address translation (NAT) device?

  1. Data Transmission

  2. Data Encryption

  3. Data Routing

  4. Address Translation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A NAT device's primary function is to translate private IP addresses used within a network to public IP addresses used on the internet, enabling devices on the network to access the internet.

Multiple choice

What is the primary function of a proxy server in a network?

  1. Data Transmission

  2. Data Encryption

  3. Data Routing

  4. Data Filtering
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A proxy server's primary function is to act as an intermediary between a client and a server, filtering and controlling the flow of data between them, providing security and improved performance.

Multiple choice

Which network design principle aims to optimize network performance by reducing the number of hops a data packet takes to reach its destination?

  1. Load Balancing

  2. Fault Tolerance

  3. Hop Count Minimization

  4. Traffic Shaping
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hop Count Minimization is a network design principle that aims to optimize network performance by reducing the number of hops a data packet takes to reach its destination, improving latency and overall network efficiency.

Multiple choice

Which of the following is NOT a type of routing protocol?

  1. RIP

  2. OSPF

  3. BGP

  4. STP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

STP is a spanning tree protocol. It is not a routing protocol.

Multiple choice

Which of the following is NOT a type of tunneling protocol?

  1. GRE

  2. IPsec

  3. PPTP

  4. L2TP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

IPsec is a security protocol. It is not a tunneling protocol.

Multiple choice

Which of the following is a key characteristic of the Sigfox protocol?

  1. High data rates

  2. Low power consumption

  3. Long range

  4. Real-time data transmission
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A key characteristic of the Sigfox protocol is its long range. Sigfox is a low-power, wide-area network (LPWAN) protocol that is designed for IoT devices that need to transmit small amounts of data over long distances.

Multiple choice

Which of the following is a key characteristic of the OPC UA protocol?

  1. High data rates

  2. Low power consumption

  3. Publish/subscribe messaging

  4. Real-time data transmission
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A key characteristic of the OPC UA protocol is publish/subscribe messaging. OPC UA is a publish/subscribe protocol that allows devices to send and receive messages over a network. This makes it ideal for IoT applications where devices need to communicate with each other and with the cloud.

Multiple choice

Which protocol is commonly used for communication between SDN controllers and network devices?

  1. HTTP

  2. TCP

  3. OpenFlow

  4. BGP
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

OpenFlow is a widely used protocol for communication between SDN controllers and network devices, enabling the controller to program the forwarding behavior of the devices.

Multiple choice

What is the term for a DDoS attack that targets a specific application or service?

  1. Application-layer DDoS attack

  2. Protocol-layer DDoS attack

  3. Network-layer DDoS attack

  4. Transport-layer DDoS attack
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An application-layer DDoS attack targets a specific application or service by flooding it with requests, causing it to become unavailable to legitimate users.

Multiple choice

What is the term for a DDoS attack that targets a specific network protocol?

  1. Protocol-layer DDoS attack

  2. Application-layer DDoS attack

  3. Network-layer DDoS attack

  4. Transport-layer DDoS attack
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A protocol-layer DDoS attack targets a specific network protocol by sending malformed packets or exploiting vulnerabilities in the protocol.

Multiple choice

Which of the following is NOT a common type of DDoS attack that targets the network layer?

  1. ICMP flood attack

  2. SYN flood attack

  3. UDP flood attack

  4. HTTP flood attack
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

HTTP flood attacks target the application layer, not the network layer. ICMP flood attacks, SYN flood attacks, and UDP flood attacks are all common types of DDoS attacks that target the network layer.