Novell
TCP is a protocol that uses those.
I believe Skype uses UDP or User Datagram Protocol.
The IMAP (Internet Message Access Protocol) email protocol usually uses port 143.
It uses ICMP.
Facebook uses the HTTP Protocol
address resolution protocol and reverse address resolution protocol
Network Control Protocol is uses to identify the Network layer protocol used in the packet
FTP uses TCP.Usage of Transport Layer protocol (tcp or udp) depends upon various applications.Such as FTP uses TCP, TFTP uses UDP.
SSH uses such port.
UDP - primarily for speed is used to transport voice packets in a VoIP deployment.
RIP uses UDP protocol with port number 520
I believe Skype uses UDP or User Datagram Protocol.