What is the difference between ethical hackers, gray hat and black hat ?
The difference between white hat grey hat and black hat hackers is their motives for hacking the system. White hat hackers do it to make sure that systems stay secure and they notify the administrators when they find vulnerability. Grey hats just hack things for the challenge and don’t necessarily tell anyone. Black hat hack things to gain information or money. Only one application can use one port at a time. Depending on the type of application and the protocol. Its very complicated but basically your web browser uses a random outgoing port and connects to the web server on port 80. Your web browser uses a different outgoing port for every concurrent connection it has. Ping is a utility used to measure how long it takes to contact and receive back a message from a remote host. Ping uses the ICMP echo request. Which is separate from tcp/udp ports. It is possible to ping most servers. It is possible to disable ping.
