Fundamentals of Computer Networking

What is a computer network?

• A computer network is a type of software application.

• A computer network is a collection of unrelated devices without communication capabilities.

• A computer network is a single computer that operates independently.

• A computer network is a system of interconnected computers and devices that can communicate and share resources.

Define the term 'IP address'.

• A method for encrypting data on a network.

• An IP address is a unique numerical label assigned to each device on a network, used for identifying and locating the device.

• A physical device that connects multiple networks.

• A type of software used for managing network traffic.

What is the purpose of a router?

• To provide antivirus protection for devices.

• To amplify Wi-Fi signals in a home network.

• The purpose of a router is to connect different networks and direct data traffic between them.

• To store data for backup purposes.

Explain the difference between TCP and UDP.

• TCP is reliable and connection-oriented, while UDP is faster and connectionless.

• UDP is reliable and connection-oriented, while TCP is faster and connectionless.

• TCP and UDP are both connection-oriented protocols with the same reliability.

• TCP is faster and connectionless, while UDP is slower and connection-oriented.

What does DNS stand for and what is its function?

• Domain Naming System

• Domain Name Service

• Domain Name System

• Data Network System

What is a subnet mask?

• A subnet mask is a physical device that connects networks.

• A subnet mask is used to encrypt data.

• A subnet mask is a type of firewall.

• A subnet mask is used to define the network and host portions of an IP address.

Describe the OSI model and its layers.

• Application, Transport, Network, Data Link, and Physical

• The OSI model has seven layers: Application, Presentation, Session, Transport, Network, Data Link, and Physical.

• Application, Presentation, Session, Transport, Network, and Internet

• Application, Session, Transport, Network, and Data Link

What is the role of a switch in a network?

• To store data for future retrieval.

• The role of a switch in a network is to connect devices and manage data traffic efficiently.

• To provide wireless connectivity to devices.

• To amplify signals in a network.

What is the difference between a LAN and a WAN?

• A LAN is used for international connections, while a WAN is for local connections.

• A LAN connects multiple cities, while a WAN connects devices within a single building.

• A LAN is a wide area network, while a WAN is a local area network.

• A LAN is a local network, while a WAN connects multiple LANs over larger distances.

What is network security and why is it important?

• Network security focuses solely on hardware protection.

• Network security is unnecessary for small businesses.

• Network security is only about physical security measures.

• Network security is crucial because it safeguards sensitive information, ensures business continuity, protects against cyber threats, and maintains user trust.