| 单词 | Token Ring (TR) |
| 释义 | Token Ring (TR) station, the nearest active upstream neighbor, and everything in between.This triggers a process of autoreconfiguration, in which nodes within the failure domain automatically initiate diagnostic measures in an attempt to identify, isolate, and bypass the point of failure. A Token Ring moves a small frame, known as a token, around the network.The token, as illustrated in Figure T-4, comprises three fields, as follows: • Start Delimiter (SD): A field of one octet that denotes the beginning of the token.The bit pattern JK0JK000 intentionally violates the Manchester coding scheme used elsewhere in the frame, thereby firmly establishing its identity. (Note: J indicates the intentional violation of a 1 bit, and K indicates the intentional violation of a 0 bit.) • Access Control (AC): A field of one octet in the bit sequence PPPTMRRR.The P bits are Priority bits.The T bit is a Token bit that, when set at a 1 value, indicates that the frame is a token frame rather than a data or command frame.The M bit is a Monitor bit set by the active monitor (AM) station when it sees the frame and subsequently can be used by the AM to identify a frame that is endlessly circling the ring.The R bits are Reservation bits used by a station to reserve the token for a future transmission. • End Delimiter (ED): A field of one octet that variously denotes the ending of the token.The bit pattern JK1JK1IE intentionally violates the Manchester coding scheme used elsewhere in the frame, thereby firmly establishing its identity. ( Note: J indicates the intentional violation of a 1 bit, and K indicates the intentional violation of a 0 bit.The I bit is an Intermediate frame bit, and the E bit is an Error detection bit.) Token SD AC ED Octets 1 1 1 Frame SD AC FC DA SA DATA FCS ED FS Octets 1 1 1 2/6 2/6 < 4048 4 1 1 |
| 随便看 |
|
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。