Can two applications listen to the same port?

Question

Can two applications on the same machine bind to the same port and IP address? Taking it a step further, can one app listen to requests coming from a certain IP and the othe

Answer 1

Just to share what @jnewton mentioned. I started an nginx and an embedded tomcat process on my mac. I can see both process runninng at 8080.

LT-MAC:~ b0$ sudo netstat -anp tcp | grep LISTEN
tcp46      0      0  *.8080                 *.*                    LISTEN     
tcp4       0      0  *.8080                 *.*                    LISTEN