Tööstuslik andmeside kontrolltöö 2 abimaterjal - vastused
Ymodem, Zmodem, Zmodem: Newer protocol than Xmodem Incorporates features of several an ack of a frame. it may in fact be more than one information frame. LLC for responding to polls) NCP component will negotiate the network layer protocol
protocols Uses CRC-32 with continuous ARQ (sliding window) Dynamically adjusts packet size once the last frame is transmitted by the secondarystation, it must wait once again Unacknowledged connectionless ("Type 1") is similar to UDP. that PPP actually encapsulates and transports.
according to communication circuit conditions Usually Zmodem is preferred to Xmodem. for explicit permissionfrom the primary station, to transfer anything. Acknowledged connectionless ("Type 3") provides acks, but For example, if the PPP link is configured to connect with IP,
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