TCP/IP Connections Introduction User Modes Connect Via... Addressing Subnet Masks Config Router Address DNS Search Paths Hosts File 802.3 Saving Configs Troubleshooting Tools For More Info Glossary updated: 08/11/97

Frame Types You may have noticed that when "Ethernet" is selected under "Connect Via", there's a checkbox available for "802.3." 802.3 is a specification for a frametype, which regulates how the header portion of the ethernet packet is arranged. For example, the frametype specification requires that the first 6 bytes of the datapacket be the destination address, the 2nd 6 bytes to be the source address, and so on. The more common frametype for TCP/IP communications over Ethernet, however , is the Ethernet II specification. The two specifications share some similarities, and a single ethernet network could support both frametypes (and often do; in fact, Macs will use 802.3 for Ethertalk packets, and Ethernet II for TCP/IP packets). But a machine using 802.3 for TCP/IP cannot communicate with a machine using the Ethernet II frametype for TCP/IP. There's more to know about ethernet frametypes, but in short, this option should only be checked when a knowledgeable network administrator tells you that 802.3 is being used for TCP/IP on the network. [Intro |UserModes |ConnectVia |Addressing |Subnet Masks |Routers ]DNS |Search Paths |Hosts File ]802.3 ]Saving Configs ]Troubleshooting ]Tools ]More Info ]Glossary ]