Tööstuslik andmeside kontrolltöö 2 abimaterjal - vastused
HDLC is code accessed by higher layers built to use PPP!: Serial ISPs use PPP over modem communications.
unscramble at receiver using inverse operation. DPLL circuit: · used to maintain bit synchronism · transparent: uses bit stuffing (zero insertion) if flag sequence would PPP over AAL5 (ATM Adaption Layer) [RFC 2364] DSL providers on the other hand use Ethernet, not serial
DPLL clock frequency 32 · bit rate · must hold frequency sufficiently constant require only small appear within frame PPP over Ethernet (PPPoE) [RFC 2516]: discussed later communications.
adjustments at irregular intervals
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