RFC 3700:Internet Official Protocol Standards
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PASS

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3. Current Technical Specifications
... SMTP Service Extension for Command Pipelining 2920 60 ONE-PASS A One-Time Password System 2289 61 ARCH-SNMP ...
... OSPF2 OSPF Version 2 54 2328 ONE-PASS A One-Time Password System 61 2289 POP3 ...

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