SNMP Enumeration & Exploitation

SNMP lets admins read a switch, router, printer or server's entire internal state over the network — and on countless devices the password guarding it is still the word "public". This covers how the MIB tree is laid out, what one snmpwalk drags out (hostnames, interfaces, routing tables, the ARP cache, processes, installed software), why v1 and v2c send everything in cleartext while v3 adds real auth, and the changes that turn SNMP back into a monitoring tool instead of a map for an attacker.