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HDLC
| Sloj | Protokol |
|---|---|
| Aplikacijski | DNS, DHCP, TLS/SSL, TFTP, FTP, HTTP, IMAP, IRC, NNTP, POP3, SIP, SMTP, SNMP, SSH, Telnet, BitTorrent, RTP, rlogin, … |
| Transportni | TCP, UDP, DCCP, SCTP, IL, RUDP, |
| Mrežni | IP (IPv4, IPv6), ICMP, IGMP, ARP, RARP, … |
| Podatkovni | Ethernet, Wi-Fi, Token ring, PPP, SLIP, FDDI, ATM, DTM, Frame Relay, SMDS, … |
HDLC je skraćenica od engleske složenice High-Level Data Link Protocol (vezni podatkovni slojni protokol vosoke razine) odnosno standard za bit-orijentirani sinkroni podatkovni protokol kojeg je razvila Internacionalna organizacija za standarde (International Organisation for Standardisation (ISO)). I prvotnoj inačici ovaj standard je imao sljedeća poglavlja:
- ISO 3309 - Frame Structure (struktura okvira)
- ISO 4335 - Elements of Procedure (elementi procedure)
- ISO 6159 - Unbalanced Classes of Procedure (nebalansirani razredi procedure)
- ISO 6256 - Balanced Classes of Procedure (balansirani razredi procedure)
Trenutni stadnard za HDLC nosi broj ISO 13239, koji objedinjuje sve gornje spomenute standarde.
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