Answer : Port No
Physical Address : A media access control address (MAC address), also called a physical address, MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and WiFi
It is used to identify the network.
Logical Address : The logical address is a 32-bit IP address that is not embedded in the network card but it is assigned to it for the purpose of routing between networks.
It is used to identify the Host
With in a network on a particular Host A port number is a way to identify a specific process