"Routing Circuit Name for Data Link 'type'?" Specify the simple-name that you want to use for the routing circuit or accept the system-supplied default. HP recommends that you take the default name even if you configure multiple lines of the same type. If you decide not to accept the default response, keep in mind that the name you specify for the data link should reflect the type of routing circuit you are configuring. The following types may be configured: o CSMACD Carrier Sense, Multiple Access with Collision Detect (CSMA/CD) protocol is the data link protocol used by Ethernet and ISO 8802-3 local area networks (LANs). o DDCMP Digital Data Communications Message Protocol (DDCMP) is the data link protocol use by wide area networks (WANs). It supports synchronous point-to-point connections and asynchronous static or dynamic point-to-point connections. DECnet software can use this protocol to make connections over WANs. o HDLC High-level Data Link Control (HDLC) is an ISO, bit-oriented, Data Link layer (OSI layer 2) protocol that operates over synchronous, switched or unswitched communications links. DECnet software can use this protocol to make connections over WANs.