FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Firewalls scan packets for malicious code or attack vectors that have already been identified as established threats. Should a data packet be flagged and determined to be a security risk, the firewall prevents it from entering the network or reaching your computer.

Detailed explanation-2: -How do firewalls work? A firewall decides which network traffic is allowed to pass through and which traffic is deemed dangerous. Essentially, it works by filtering out the good from the bad, or the trusted from the untrusted.

Detailed explanation-3: -A firewall safeguards your PC against harmful data by filtering them out of the system. It protects against backdoors, denial-of-service attacks, macros, remote logins, spam, and viruses. A backdoor is a way to gain access to an application with a vulnerability that attackers exploit to gain access.

Detailed explanation-4: -A network firewall is a security device that monitors all incoming and outgoing traffic on a private network. Network firewalls work like device-specific firewalls, but they protect an entire network by blocking unauthorized access, which protects all the devices connected to that network.

Detailed explanation-5: -Firewalls carefully analyze incoming traffic based on pre-established rules and filter traffic coming from unsecured or suspicious sources to prevent attacks. Firewalls guard traffic at a computer’s entry point, called ports, which is where information is exchanged with external devices.