Control field values

The token-ring control fields include an unnmubered information frame, an exchange identification frame, and a test frame. Their values are described here.

Item Description
x`03' Unnumbered Information (UI) frame. This is the normal, or unsequenced, way in which token-ring adapter data is transmitted through the network. TCP/IP sequences the data.
x`AF' Exchange identification (XID) frame. This frame conveys the characteristics of the sending host.
x`E3' Test frame. This frame supports testing of the transmission path, echoing back the data that is received.