3Com broad 3Com claim 3Com close 3Com close 3Com conn 3Com conn 3Com conn 3Com Corp 3Com Corp 3Com Corp 3Com Corp 3Com Corp 3Com Corp 3COM Corp 3COM Corp 3COM Corp 3COM Corp 3Com data 3Com delete 3Com rem r 3Com rem r 3Com reset 3Com sys 3Comloopdetect 3ComTCP IPSys 3ComXNSSysMgmt Aeonic Systems Apollo Computer Apollo Computers AppleTalk AARP AppleTalk Applitek Corporation ARP ATT Autophon Banyan Systems Banyan VINES BBN Simnet BBNVITAL LanBridgecache Berkeley Trailernego Cabletron CHAOSNET ComDesign Computgraphic Corp Counterpoint Computers Cronus Direct Cronus VLN Dansk DataElektronik DEC Amber_unassigned DEC CustomerProtocol DEC DECNETPhaseIVRoute DEC DiagnosticProtocol DEC EthernetEncryption DEC LANBridge DEC LANTrafficMonitor DEC LAT DEC LAVC SCA DEC MOPDump Load DEC MOPRemoteConsole DEC Unassigned EXP DEC Unassigned ECMA Internet Evans Sutherland Excelan ExperData Experimental General Dynamics HP Extended HP Probe IBM SNAServiceonEther IEEE 802.3 Length Field IP trailer 1 IP trailer 10 IP trailer 11 IP trailer 12 IP trailer 13 IP trailer 14 IP trailer 15 IP trailer 2 IP trailer 3 IP trailer 4 IP trailer 5 IP trailer 6 IP trailer 7 IP trailer 8 IP trailer 9 ISO Net ISO Net LAN Management g LAN Management i Little Machines LLC Group LLC Management Loopback MAP Management Matra Merit Internodal NBS Internet Nestar NetBEUI NetBIOS NetWare Nixdorf Computers OS/2 Micro Pacer Software PAP PCS BasicBlockProtocol Planning ResearchCorp PPP_AppleTalk Control Protocol PPP_Ascend's Multilink Protocol Plus PPP_Bandwidth Allocation Control Protocol PPP_Bandwidth Allocation Protocol PPP_Banyan Vines Control Protocol PPP_Bridging Control Protocol PPP_Challenge Handshake Autication Protocol PPP_Compression Control Protocol PPP_DECnet Phase IV Control Protocol PPP_Encryption Control Protocol PPP_Extensible Autication Protocol PPP_Internet Protocol Control Protocol PPP_IPv6 Control Protocol PPP_IPX Control Protocol PPP_LAN Extension Protocol PPP_Link Control Protocol PPP_Link Quality Report Protocol PPP_Multi-link Protocol PPP_NetBIOS Frames Control Protocol PPP_OSI Network Layer Control Protocol PPP_Serial Data Control Protocol PPP_Serial Data Transport Protocol PPP_SNA Control Protocol PPP_XNS IDP Control Protocol PPP PPP2 PPP3 Proteon Proway LAN Proway LAN PUP AddrTrans Retix Reverse ARP RPL IBM RS-511 SGI bounceserver SGI diagnostics SGI networkgames SGI reserved SNA path-g SNA path-i SNMP Spanning Tree Spider SystemsLtd Stanford VKernelexp Stanford VKernelprod Symbolics Private Tymshare Ungermann Bassdia loop Ungermann Bassdownload Ungermann Bassnetdebugr Valid Systems Varian Associates Veeco IntegratedAuto VGLaboratorySystems Vitalink TransLANIII Waterloo Microsystems X25 Xerox IEEE802 3PUP Xerox PUP Address Translation Xerox PUP Xerox XNS IDP XNS Compatability Xyplex X75

0 Reserved1 ICMP2 IGMP3 GGP4 Unassigned5 ST6 TCP7 UCL8 EGP9 IGP10 BBN -RCC - MON11 NVP -II12 PUP13 ARGUS14 EMCON15 XNET16 CHAOS17 UDP18 MUX19 DCN -MEAS20 HMP21 PRM22 XNS -IDP23 TRUNK -124 TRUNK -225 LEAF -126 LEAF -227 RDP28 IRTP29 ISO -TP430 NETBLT31 MFE -NSP32 MERIT -INP33 SEP34 3PC35 Unassigned36 Unassigned37 Unassigned38 Unassigned39 Unassigned40 Unassigned41 Unassigned42 Unassigned43 Unassigned44 Unassigned45 Unassigned46 Unassigned47 Unassigned48 Unassigned49 Unassigned50 Unassigned51 Unassigned52 Unassigned53 Unassigned54 Unassigned55 Unassigned56 Unassigned57 Unassigned58 Unassigned59 Unassigned60 Unassigned61 any host internal protocol62 CFTP63 any local network64 SAT -EXPAK65 Unassigned66 RVD67 IPPC68 any distributed file system69 SAT -MON70 VISA71 IPCV72 Unassigned73 Unassigned74 Unassigned75 Unassigned76 BR -SAT - MON77 SUN -ND78 WB -MON79 WB -EXPAK80 ISO -IP81 VMTP82 SECURE -VMTP83 VINES84 TTP85 NSFNET -IGP86 DGP87 TCF88 IGRP89 OSPFIGP90 Sprite -RPC91 LARP92 to 254 Unassigned255 Reserved