Displaying the public IP address If you want to know the public IP address of a Linux server, you can send an HTTP request to one of the following web [ … ]

In Total of 65,536 TCP and UDP ports Some of them are classified as “privileged”, those ports are below 1024, and “unprivileged”, ports are  1024 and above. Most servers use [ … ]

To know Allocation of Total Lan ips AngryIpScanner is the best tool apt-get install gdebi wget http://github.com/angryziber/ipscan/releases/download/3.3.3/ipscan_3.3.3_amd64.deb gdebi ipscan_3.3.3_amd64.deb you can open with GUI and with terminal after Installtion In [ … ]

Shortcut to remember the flow of OSI model (APSTNDP) ApplicationLayer a PresentationLayer p SessionLayer s TransportLayer t NetworkLayer n DatalinkLayer d PhysicalLayer p