The figure is an interactive media element that allows the user to select one of the many TCP/IP protocols and receive a brief description about it.  The protocols include DNS, DHCP, SMTP, FTP, UDP, TCP, IP, and ARP. Figure one is an interactive media element that allows the user to select one of the many T.C.P.I.P protocols and receive a brief description about it.  The protocols include D.N.S., D.H.C.P., S.M.T.P., F.T.P., U.D.P., T.C.P., I.P., and A.R.P.