Explore the fundamentals of networking, from IP addresses to the roles of routers and switches. This extensive guide is perfect for gaining a quick grasp on essential networking concepts.
The note you’re about to read is taken from this networking course on youtube
Host
A host is any device which send or receive traffic e.g Laptop, cloud servers, and even IoT devices such as TV, smart watches, and lights
Types of hosts
- Client - They initiate requests
- Servers - They respond to requests
PS: Clients and servers are basically computers communicating with each other. At any point, they can switch roles depending on the setup.
IP Address
An IP address is the identity of each host. And every host must have an IP address. For everything sent on the internet from a host, there’s a source IP and destination IP. IP addresses are 32 bits, and they are made up of 4 instances of a number from 0-255. An example of an IP address - 136.22.17.98.
In a process called subnettting, IP addresses are assigned based on heirachy. For instance, an IP 10.30.55.127 could mean, 10 - Host at ACME, 30 - Based in London, 55 - in an engineering department.
Network
A network is when 2 or more hosts are connected. Networking is a system of automating these connections. A network can contain other networks, called sub-networks or subnets. Therefore, the internet as we know it, is a bunch of networks connected to each other.
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