The Management Information Base (MIB) is a collection of object groups that is managed by which service?

The Management Information Base (MIB) is a structured database defining manageable objects (e.g.,

CPU usage, interface status) in a network device. It’s part of the SNMP (Simple Network

Management Protocol) framework, per RFC 1157, used for monitoring and managing network

devices (e.g., routers, switches).

SNMP Mechanics:

MIB Structure: Hierarchical, with Object Identifiers (OIDs) like 1.3.6.1.2.1.1.1.0 (sysDescr).

Versions: SNMPv1, v2c (community strings), v3 (encrypted).

Ports: UDP 161 (agent), 162 (traps).

Operation: Agents expose MIB data; managers (e.g., Nagios) query it via GET/SET commands.

MIB files (e.g., IF-MIB, HOST-RESOURCES-MIB) are vendor-specific or standardized, parsed by SNMP

tools (e.g., snmpwalk). CNSP likely covers SNMP for network monitoring and securing it against

enumeration (e.g., weak community strings like "public").

Why other options are incorrect:

A . SMTP (Simple Mail Transfer Protocol): Email delivery (TCP 25), unrelated to MIB or device

management.

C . NTP (Network Time Protocol): Time synchronization (UDP 123), not MIB-related.

D . TACACS (Terminal Access Controller Access-Control System): Authentication/authorization (TCP

49), not MIB management.

Real-World Context: SNMP misconfiguration led to the 2018 Cisco switch exploits via exposed MIB

data.

Reference: CNSP Official Study Guide (Network Monitoring Protocols); RFC 1157 (SNMP).