Networking 141 — Introduction to Networking Fundamentals + 4 more topics

Photo by Brett Sayles on Pexels

Photo by Alex Aparicio on Pexels

An IP address actually has two parts: the network portion and the host portion. The network portion identifies which network a device belongs to, and the host portion identifies the specific device within that network.

The subnet mask tells a device which part of an IP address is the network portion and which is the host portion. It's also a 32-bit number, usually written in the same dotted-decimal format (e.g., 255.255.255.0). Where there's a '1' in the subnet mask's binary form, that bit in the IP address belongs to the network portion. Where there's a '0', it belongs to the host portion.

Photo by Image Hunter on Pexels

Network security is all about protecting your network infrastructure, data, and users from unauthorized access, misuse, disclosure, disruption, modification, or destruction. It involves multiple layers of defense.

Photo by Nathan Thomas on Pexels