Which protocol is used to manage complex networks?

• A. SSH
• B. Simple Network Management Protocol (SNMP)
• C. HTTP
• D. NTP

Answer: (B)

Managing large, complex networks requires a protocol that can collect data from many devices, standardize what’s reported, and support alerts and remote configuration. SNMP does exactly that by using a central manager that talks to agents running on each device. The data a device shares is organized in a management information base, a structured collection of objects identified by identifiers. The manager can poll these objects to gather status and performance data, or the device can send traps to notify the manager when something notable happens. This setup provides a scalable, vendor-neutral way to monitor, configure, and troubleshoot a whole network from a single point.

Versions of SNMP have evolved to address security and privacy concerns, with SNMPv3 introducing authentication and encryption, making it suitable for enterprise environments. In contrast, SSH is primarily for secure interactive access to individual devices, not for broad, centralized monitoring; HTTP is for web communication and does not offer built-in network management data collection; NTP handles time synchronization, not management. So SNMP is the best-fit protocol for managing complex networks.