Case $2-2$: Defining the IP Address and Ports Used by Destination Servers

A coworker$$s computer seems to be connecting to various computers on the Internet on its own. The computer gets pop$-$up advertisements and other pop$-$ups out of the blue. Which command syntax is used to analyze which IP addresses and ports the computer is connecting to$?$ And which layers of the OSI model do the IP addresses and ports correspond to$?$