In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.
Network security is anything you do to protect your network, both hardware and software. Network administrators (or system administrators) are responsible for making sure the usability, reliability, and integrity of your network remains intact. A hacker is capable of getting into a network and blocking your access, for example by holding a system hostage for a bitcoin ransom. You need an excellent defense in place to ensure you’re protected.
It’s said that users are often the weakest link in the security chain, whether it’s because they’re not properly educated about phishing campaigns, mistakenly give credentials to unauthorized users, download malware (malicious software), or use weak passwords. That’s why endpoint security is so crucial—it protects you from the outside in.
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