Back to notes
Explain the importance of network protocols and give an example of one.
Press to flip
Network protocols define rules for data transmission, ensuring data integrity, flow control, and error-free communication; TCP/IP is an example used for internet communication.
Explain the difference between the Internet and the World Wide Web.
The Internet is a large network using the TCP/IP protocol and physical infrastructure, while the World Wide Web is the collection of information (websites) accessed through the Internet.
How does a switch differ from a hub in a network?
A switch sends data from one specific computer to another, while a hub sends data to all devices connected to it, making it less efficient.
Describe two-factor authentication and its benefits.
Two-factor authentication (2FA) requires two forms of identification, such as a password and an SMS code, enhancing security by making unauthorized access more difficult.
Compare and contrast Wi-Fi and Ethernet as transmission media.
Wi-Fi uses radio waves for wireless connectivity and is easy to set up but can be less secure and reliable. Ethernet uses cables for wired connections, offering higher security and reliability but requiring more installation effort.
How do routers facilitate connectivity in a network?
Routers connect multiple networks, such as local home networks to the internet, directing data packets between different networks effectively.
How do Virtual LANs (VLANs) enhance network management and security?
VLANs use software to mimic physical LANs, allowing for flexible network segmentation, improved security, and easier configuration.
What are the key characteristics of a Local Area Network (LAN)?
LANs cover a single building or site with high transfer rates and lower costs/setup compared to wider networks.
Describe the concept of packet switching used in data transmission.
Packet switching divides data into packets, each with a payload, header, and footer; packets are sent independently over the network and reassembled at the destination.
What is the significance of firewalls in network security?
Firewalls control incoming and outgoing network traffic by analyzing data packets and enforcing security rules, preventing unauthorized access and threats.
What role do Internet Service Providers (ISPs) play in internet connectivity?
ISPs provide internet access to users and businesses, connecting them to the larger internet infrastructure and Internet Exchanges.
List the seven layers of the OSI model.
The seven layers of the OSI model are: Physical, Data Link, Network, Transport, Session, Presentation, Application.
What are lossy and lossless compression, and when are they typically used?
Lossy compression removes data that cannot be recovered and is used for multimedia files to reduce size. Lossless compression uses algorithms to compress data without loss, suitable for text and important data.
What are the main roles of clients and servers in a network?
Servers hold data and send/receive instructions, while clients request services or connect to servers to access services.
What is the primary function of a Virtual Private Network (VPN)?
A VPN provides a secure connection to a server by using tunneling and encryption, ensuring data privacy over public networks.
Previous
Next