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How do I find my port number?

Step 1: Send the following text message - PORT followed by your 10-digit mobile number to TRAI's central number for mobile number portability -  1900 . Example: Send 'PORT 98xxxxxx98' to  1900 . You'll receive an SMS back with a Port out code. Then type “netstat -a” and press “Enter.” A list of all your active TCP/IP connections will populate. The  port numbers  appear after the IP address with a colon separating the two. For example, if your IP address is 192.168.1.1 and you see an entry for 192.168.1.1:2869, it means  port  2869 is open. A port number is a way to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.  For the Transmission Control Protocol and the User Datagram Protocol, a port number is a 16-bit integer that is put in the header appended to a message unit.  This port number is passed logically between client and server transport layers and physically between the transport

TCP/IP (Transmission Control Protocol/Internet Protocol)

TCP/IP (Transmission Control Protocol/Internet Protocol) OSI Seven Layer Model This will present TCP/IP communications starting from Layer 2 up to Layer 4 (TCP/IP applications cover Layers 5-7) IP Addresses Data Link Layer Network Frames Address Resolution Protocol Network Layer Internet Protocol IP Routing ICMP Error Reporting Transport Layer User Datagram Protocol Transmission Control Protocol Session through Application Layers Domain Name System Final example tracing DNS transaction through a router Definitions:- Physical network - a collection of computers, communications devices, wiring, etc. that communicate directly with one another (e.g., Ethernet, Token Ring) Host - A computer, connected to a physical network, that exchanges information with another computer via TCP/IP Gateway - A computer that interconnects two or more physical networks and that routes TCP/IP information among those n