9. If a port number is 16 bits ( 2 bytes), what is the minimum header size at transport layer of the TCP/IP protocol suite? 10. If a logical address is 32 bits ( 4 bytes), what is the minimum header size at network layer of the TCP/IP protocol suite? 11. If a physical address is 48 bits ( 6 bytes) what is the minimum header size at the data link layer of the TCP/IP protocol suite