Explanatory book or resource on snmp?

Question

System administration

Please advise. In snmp full zero. Generally. I only know what is.

Answer 1

Where to start:
theory - read www.net-snmp.org/wiki/index.php
practice - take a device that supports snmp if there is none, then install snmp on linux or windows, set up a community (allow polling from a specific ip) and use snmpwalk trying to get data.
snmp is actively used in practice to monitor devices from servers to a network
server, for example, a linux server - these are CPU and memory statistics, free space on partitions, utilization of network interfaces. on network equipment, this is the utilization of ports, number of sessions, and so on.
it is also possible to control the equipment (if this functionality is supported) via snmp. - for example, enable or disable ports on the switch.
Free monitoring systems that use snmp - Cacti, Zabbix, Observium.... etc.

Answer 2

Here it is well described in Russian. For understanding the basics - that's it.