What is sarm?

sarm is to set the asynchronous balanced mode. The asynchronous balanced mode is a bit-oriented data link layer protocol for transmitting data on a synchronous network. It was formulated by the International Organization for Standardization [ISO].

sarm is:

SABM is the abbreviation of Set Asynchronous Balanced Mode, which is called Set Asynchronous Balanced Mode in Chinese. Its function is to request the other party to establish the asynchronous balancing mode (ABM). The asynchronous balanced mode is a bit-oriented data link layer protocol that transmits data on a synchronous network and was developed by the International Organization for Standardization (ISO).

1. Process

Any one of the two composite stations on the balanced link can send out a SABM command frame with P = 1, and wait until multiple parties respond with an F After the unnumbered response frame UA = 1, the link establishment is completed. Any station can send a DISC command frame with p = 1 after the data transmission is completed. After the other party responds with an unnumbered acknowledgment frame UA of F = 1, the link disassembly is completed.

2. Mode

HDLC is a superset of IBM's Synchronous Data Link Control Procedure (SDLC). SDLC was successfully developed from the BISYNC communication protocol and was initially introduced through IBM's System Network Architecture (SNA) product. Another name for HDLC is Advanced Data Communications Control Protocol (ADCCP). This name was named by the American National Standards Institute (ANSI), but HDLC is more widely accepted by users. There are incompatibilities between SDLC and HDLC due to different vendors.

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