Networking and Internet
A computer network is a group of two or more computers connected together. They connect to share data and hardware like printers or scanners. The Internet is the largest network in the entire world. It connects millions of computers across every country. Think of it as a global web of information. When you send an email, it travels through this web. Computers use special sets of rules called protocols to talk to each other. Without these rules, computers would not understand the data being sent.
Concepts (3)
This is a unique identification number for every device on the internet. IPv4 is the older version and uses four sets of numbers like 192.168.1.1. IPv6 is the newer version because we ran out of IPv4 addresses.
This is a unique identification number for every device on the internet. IPv4 is the older version and uses four sets of numbers like 192.168.1.1. IPv6 is the newer version because we ran out of IPv4 addresses. IPv6 uses a mix of numbers and letters to allow billions of more devices. Example: Your smartphone has a unique IP address when you connect to Wi-Fi.
The OSI model has seven layers that describe how data moves through a network. Each layer has a specific job. For example, the Physical Layer deals with cables and electricity.
The OSI model has seven layers that describe how data moves through a network. Each layer has a specific job. For example, the Physical Layer deals with cables and electricity. The Application Layer is what users interact with directly, like a web browser or email app. Example: When you click 'Send' on an email, it starts at the top layer and moves down to the cables.
Topology is the physical or logical layout of a network. In a Star Topology, all devices connect to one central hub. If the hub fails, the whole network stops. In a Bus Topology, all devices connect to one single main cable.
Topology is the physical or logical layout of a network. In a Star Topology, all devices connect to one central hub. If the hub fails, the whole network stops. In a Bus Topology, all devices connect to one single main cable. In a Mesh Topology, every device is connected to every other device for high reliability. Example: Most office Wi-Fi networks use a Star layout.
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