Position of Ipin TcP/ip protocol suite pplicationSMTP‖ FTPTFTP‖DNs|SNMP IBOOTP layer Transport TCP UDP IGMP ICMP Network IP ayer ARP RARP Data link laver Underlying LAN or WAN technolog eICSIE, NTUT, TAIWAN 3 Figure 8-1 Position of IP in TCP/IP protocol suite