Network security

Network security is like having a big fence around your house. It's like making sure only people you want to come in can get in, and bad people can't get in without permission. When you have network security, it's like someone is watching your "fence" all the time, and if something bad tries to come in, they can stop it. Network security means that all the data and information that is on your network (like computers, phones and other devices) is safe and secure.