17. (5 pts) A (server) process invokes the accept() system call and passes as a parameter a socket descriptor, call it ski. The accept() call returns the descriptor for a new socket, enabling the server process to communicate with the connecting client process using a dedicated socket, and not the same one used to accept connection requests. However, the port number p associated with the new socket is the same as for the original socket. When a packet arrives containing port number p, how does the operating system know to which socket the packet should be delivered? 7 18. (4 pts) In DNS, iterated queries are more common than recursive queries. What is the advantage of the former