To prevent intrusions, companies install combinations of hardware and software systems called firewalls. Firewalls help keep unauthorized web users from tapping into private corporate data.
Explanation
Firewalls have been used so much in the corporate world, they have become part and parcel in our lives. They can be defined as hardware or software system components designed to solely limit or prevent access deemed malicious and illegal from internal or external devices. Hackers have honed their skills and can often gain access to corporate systems and servers quickly. Without firewalls, these hackers may infiltrate your entire network and launch an attack.
All traffic coming in and leaving the network is monitored by a firewall and permits what it thinks is clean and blocks what it thinks is malicious. It acts as a barrier between you and the external network (usually the internet).
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