Fundamentals of Computer Networks

What is a computer network?

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

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

• A computer network is a type of software used for programming.

• A computer network is a collection of random devices without any connection.

What are the main types of computer networks?

• VPN, VLAN, WLAN, SAN

• Internet, Intranet, Extranet, Cloud

• Bluetooth, Ethernet, Fiber, DSL

• LAN, WAN, MAN, PAN

What does LAN stand for?

• Local Area Network

• Limited Area Network

• Large Area Network

• Local Access Network

What is the purpose of a router?

• To provide power to devices on a network

• To store data for backup purposes

• To amplify signals in a network

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

What is the difference between a switch and a hub?

• A switch can only connect devices wirelessly, whereas a hub can connect both wired and wireless devices.

• A hub is faster than a switch because it can handle more data at once.

• A switch is more efficient and intelligent than a hub, as it directs data to specific devices rather than broadcasting to all.

• A hub connects devices using IP addresses while a switch uses MAC addresses.

What is an IP address?

• A physical device that connects to the internet.

• A type of software used for network security.

• A protocol for transferring files over the internet.

• An IP address is a unique numerical label assigned to each device on a network.

What is the function of a firewall in a network?

• To increase the speed of network connections.

• To encrypt all data transmitted over the network.

• To provide internet access to all devices in the network.

• The function of a firewall in a network is to monitor and control incoming and outgoing traffic based on security rules.

What does WAN stand for?

• Wired Access Network

• Wireless Area Network

• Wide Area Network

• Wide Area Node

What is the OSI model?

• A method for hardware troubleshooting.

• The OSI model is a seven-layer framework for understanding network communication.

• A five-layer model for data encryption.

• A protocol for secure file transfer.

What layer of the OSI model does TCP operate on?

• Data link layer

• Network layer

• Transport layer

• Application layer