Question

Which address identifies a process on a host?

a. Physical address
b. Specific address
c. Port address
d. Logical address

Answer 1

A port address identifies a process on a host, with each process or service using a unique port number as a communication endpoint.

Step-by-step explanation:

The address that identifies a process on a host is a port address. Within the context of computer networks, when a message is sent over to a host (like a computer), the physical address is used to identify the device within the local network, while the logical address (usually an IP address) is used to identify the host across a broader network like the internet. However, neither of these addresses specifies the process or service within the host that needs to handle the received data. For this purpose, a port number is used, which serves as a communication endpoint for each specific process or service. For example, web servers usually listen on port 80 for HTTP or port 443 for HTTPS.