What is an SNMP GetBulk Request?

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SNMP is a very common communication protocol for remote monitoring systems. That's because it allows the real-time exchange of information between network devices - and it also allows notifications of events to be sent to technicians.
Every version of this protocol (SNMPv1, SNMPv2c, and SNMPv3) supports three request types - Get, GetNext and Set. However, the newer versions of SNMP also support an additional request message called GetBulk
In this video, Andrew explains what GetBulk is and how it works.
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Hi! I have a question. In my experiments, I made a getBulkRequest to a MIB, with 9 var binds (9 columns of a table) meaning I wanted the response to have those 9 attributes. But in the getresponse a total of 108 var binds came, and some of them weren't even columns that I asked for. Why are the columns that I didn't ask for, in the response PDU? Does the getBulk ONLY respond to the request varbinds, or does it read all varbinds in between the ones requested? Btw loved the video, thanks

pedroafonsorodrigues