Firewalls and PortsĪ firewall is a security program that allows or blocks network traffic based on a specified set of rules. However, the web page files, emails, and files transferred from Mike flow to David's computer over the same WiFi connection. Meanwhile, at the same time, David's computer can load HTTP webpages using port 80 and emails using port 25. Because Mike's file transfer uses port 21, designated for FTP, David's computer can receive and store the file if it lands on port 21. The email application will not recognize it and will not process it because it is not built to serve that function. Suppose David's computer passes that file to its email application. In that way, more than one connection can be constructed using a single network.įor example, Mike transfers a file to David using FTP protocol. Ports provide a diverse functionality for communicating multiple requests on the same network address over the same WiFi connection.
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Ports are the helping hands that tell computers how to treat those data. Various data types are transferred from one computer to another. Can ports make network connections more efficient?
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However, ports 49152 and higher are free to use. The TCP ports from 1024 – 49151 are available for services or applications. The first 0 to 1023 TCP ports are well-known and reserved for applications, and IANA keeps them standardized. Port 3389 for Remote Desktop Protocol (RDP).Port 500 for Internet Security Association and Key Management Protocol (ISAKMP).Port 445 for Server Message Block (SMB).Port 161 for Simple Network Management Protocol (SNMP).
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We can recognize it as a logical construct used to specify a network service or a particular function at the software level. Each port is associated with a specific service or process. Ports are software-based and managed by the computer's operating system. It is the virtual point where the network connection starts and ends. Port is a term used in computer networking.
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