The difference between antivirus and firewall security measures. Why is it more effective to combine the two, rather than relying on one safeguard alone?
In computing, a firewall is a software or firmware that enforces a set of rules about what data packets will be allowed to enter or leave a network. Firewalls are incorporated into a wide variety of networked devices to filter traffic and lower the risk that malicious packets travelling over the public internet can impact the security of a private network.
The term firewall is a metaphor that compares a type of physical barrier that's put in place to limit the damage a fire can cause, with a virtual barrier that's put in place to limit damage from an external or internal cyberattack. When located at the perimeter of a network, firewalls provide low-level network protection, as well as important logging and auditing functions.
While the two main types of firewalls are host-based and network-based, there are many different types that can be found in different places and controlling different activities. A host-based firewall is installed on individual servers and monitors incoming and outgoing signals. A network-based firewall can be built into the cloud's infrastructure, or it can be a virtual firewall service.
Antivirus software is a class of program designed to prevent, detect and remove malware infections on individual computing devices, networks and IT systems.
Antivirus software, originally designed to detect and remove viruses from computers, can also protect against a wide variety of threats, including other types of malicious software, such as keyloggers, browser hijackers, Trojan horses, worms, rootkits, spyware, adware, botnets and ransomware.
A firewall will not protect you from viruses and other malware. A firewall just limits outside network access to a computer or local network by blocking or restricting ports. Firewalls help prevent your computer from communicating with other computers on the network and the Internet.
If you want to truly protect your computer from potential threats, having both a firewall to prevent your network from internal and external packets that cause a potential threat to your information and antivirus program for preventing mostly external attacks which could be malicious programs like viruses, keyloggers etc... To prevent your data stolen or damaged and become immune to all attacks you need both security systems. Even if you have both systems you still need the common sense to prevent things which threaten you.