We can manage proactively, and we can manage reactively. SNMP is a protocol that can help us with both. A management server will use SNMP polling to collect information from devices on our network. This builds charts and dashboards to help us evaluate the health of our network. If a device has a problem, it may even send an SNMP trap to the management server. The server can then take an appropriate action, like alert us. SNMP information is stored in a hierarchical structure called a MIB (Management Information Base). This is a collection of objects called OIDs (Object Identifiers). These describe the information that can be collected from devices, and how to interpret it. When a poll is sent, the server will also specify a community string. This string is a simple form of authentication. Unfortunately, it is stored in plan-text, both in the message and in the configuration. There are three versions of SNMP. v1 came first, and v2 extended this by adding support for 64-bit counters. v3 added real authentication and encryption. v3 is recommended in most cases. Overview of this video: 0:00 Introduction 0:56 Polling and Traps 3:05 MIBs and OIDs 5:06 Community Strings 6:29 Versions 8:12 Configuration Quiz Link: https://networkdirection.net/labsandquizzes/quizzes/snmp-quiz Lab Link: https://networkdirection.net/labsandquizzes/labs/lab-snmp SNMP Tester: https://www.paessler.com/tools/snmptester (Affiliate Link) CCNA 200-301 Official Guide (Volume 1): https://click.linksynergy.com/link?id=RL4E*8CmbSY&offerid=145238.2955226&type=2&murl=http%3A%2F%2Fwww.ciscopress.com%2Ftitle%2F9780135792735 (Affiliate Link) CCNA 200-301 Official Guide (Volume 2): https://click.linksynergy.com/link?id=RL4E*8CmbSY&offerid=145238.2885639&type=2&murl=http%3A%2F%2Fwww.ciscopress.com%2Ftitle%2F9781587147135 Patreon information: https://networkdirection.net/patreon/ LET'S CONNECT 🌏 null 🌏 https://twitter.com/NetwrkDirection 🌏 https://www.patreon.com/NetworkDirection 🌏 https://www.networkdirection.net/ #NetworkDirection #networking #snmp