---
type: SNMP Concept
title: "Standard MIBs: MIB-II (RFC 1213) and the Essentials"
description: "MIB-II, HOST-RESOURCES-MIB, IF-MIB and other standard SNMP MIBs with RFCs and root OIDs."
resource: "https://snmp-monitoring.info/what-is-snmp/mib/standard/"
tags: [what-is-snmp]
timestamp: 2026-07-10T00:00:00Z
---

# Standard MIBs: MIB-II (RFC 1213) and the Essentials

MIB-II, HOST-RESOURCES-MIB, IF-MIB and other standard SNMP MIBs with RFCs and root OIDs.

## Related concepts

- Up: [What Is a MIB in SNMP? Files, Structure & Usage](/what-is-snmp/mib/index.md)

## Frequently asked questions

### What is MIB-II?

MIB-II (RFC 1213) is the classic standard management information base under 1.3.6.1.2.1, with groups like system, interfaces, ip, tcp, udp, and snmp.

### Which MIB has CPU and memory?

HOST-RESOURCES-MIB (RFC 2790) under 1.3.6.1.2.1.25 is the usual standard place for host CPU/storage/memory/process style objects—when the agent implements it.

### Which MIB has interface counters?

IF-MIB (RFC 2863) — roots 1.3.6.1.2.1.2 / 1.3.6.1.2.1.31. Also related historical interface objects under MIB-II.

### What is the OID for MIB-2?

The mib-2 tree is 1.3.6.1.2.1.

## Source

Concept generated from https://snmp-monitoring.info/what-is-snmp/mib/standard/ — the SNMP Monitoring vendor-neutral knowledge base. Content is limited to what that page states (no external claims added here).