You have to use both. ARP and RARP cannot be used for the same purpose one gives IP from the MAC address another one MAC address from IP.
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
tradional TCP is a transmission control protocol which uses fixed end system for transmission of packets.
address resolution protocol and reverse address resolution protocol
VoIP Voice Over Internet Protocol, it is a phone system that uses internet networks.
Network Control Protocol is uses to identify the Network layer protocol used in the packet
The internet is a system of connected computer network. The internet uses TCP/IP protocol to link all the connected computers.
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.