Technology reading

I don't remember where I read this from. Here are the notes:

• SNMP: servers on devices, clients query devices. servers reply to SNMP request if the community string in the request matches the one it expects.
  
• SNMP Management Information Base (MIB) defined using ASN.1 format
• SNMP communication defines a UDP message (get, get-next, set, trap) encoded in PDUs (Protocol Data Units.)
• SNMP defines a start set of values (defined by string or a numeric identifier in dot-notation)
• SNMP defines a standard way of adding objects
• SNMP MIBs are arranged in a tree, with ISO internet on top andour main branches
  

internet -+- mgmt           (standard SNMP object)
     |- private        (vendor SNMP object)
     |- experimental   (not really used)
     `- directory      (not really used)

• Tree leaves are either discrete MIB objects (`.0' extention to their name) or table MIB objects (`.' extention to their name)
• MIBS have specific values, defined in SNMP primitive types (text, counter, gauge, integer, enum, etc...) MIB objects have acces values (ro, rw, wo)

I'm adding more to this SNMP stuff:

• The SNMP FAQ is huge, it's here, it points to a good introduction available as a PDF.