Similarly, most modern computing devices have some form of firewall built-in, as a security protection that keeps your device safe and secure as it performs its typical duties around the web and within its own processing. In civil engineering and architecture, a firewall is a wall that’s designed specifically to be highly resistant to combustion, and it keeps a building from burning down entirely if one part happens to catch on fire. Fear not: a firewall is actually a good thing, a protective tool that keeps your device safe from viruses and some kinds of malicious attacks. If Internet security is not your cup of tea, then the word “firewall” might sound like something very bad, and certainly not something you’d want to install on your Android smartphone or tablet.
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