Computer Networks and Internet Basics

What is a computer network?

• A computer network is a collection of random devices that do not communicate.

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

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

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

Which protocol is used to send web pages over the internet?

• FTP

• SMTP

• HTTP

• POP3

How many bits are in an IPv4 address?

• 32 bits

• 128 bits

• 64 bits

• 16 bits

What device connects multiple computer networks over a wider area?

• Switch

• Hub

• Modem

• Router

What is one purpose of the Domain Name System (DNS)?

• To store user passwords securely.

• To translate domain names into IP addresses.

• To provide web hosting services.

• To manage network traffic efficiently.

What does LAN stand for in networking?

• Large Area Network

• Longitudinal Area Network

• Local Access Network

• Local Area Network

Which layer of the OSI model is responsible for data encryption?

• Network layer (Layer 3)

• Transport layer (Layer 4)

• Application layer (Layer 7)

• Presentation layer (Layer 6)

What is the main function of a firewall in a network?

• To enhance internet speed and performance.

• To store user data securely.

• To control network traffic and protect against unauthorized access.

• To provide wireless connectivity to devices.

What does VPN stand for?

• Virtual Protected Network

• Virtual Public Network

• Virtual Private Network

• Variable Private Network

Which topology connects all devices to a single central hub?

• Ring topology

• Bus topology

• Star topology

• Mesh topology