COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Information has right password to access the firewall
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The port received is opened
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Permission is granted to the information if it is in the white list
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Packets
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Detailed explanation-1: -Ports in your computer’s firewall control whether or not a program can access or be accessed by your computer. Network ports exist on your network firewall, and have the same function-except that opening or closing ports on the network firewall controls access for ALL devices on that network.
Detailed explanation-2: -In a TCP/IP network, a port is a number that identifies the type of network traffic. If an incoming or outgoing port is “open, ” packets with that port number are allowed into or out of the local network (LAN). Ports are opened and closed in the firewall.
Detailed explanation-3: -Attackers use open ports to find potential exploits. To run an exploit, the attacker needs to find a vulnerability. To find a vulnerability, the attacker needs to fingerprint all services that run on a machine, including what protocols it uses, which programs implement them, and ideally the versions of those programs.
Detailed explanation-4: -An open port refers to a TCP or UDP port number that is actively accepting packets. In other words, behind it is a system that is receiving communication. A closed port, on the other hand, rejects or ignores packets. Some ports are reserved for specific protocols and are therefore required to be open.