Final answer:
SNMP (Simple Network Management Protocol) is the protocol designed for managing complex networks. It allows network administrators to monitor and manage network devices. Other options like TCP, UDP, and ICMP serve different purposes, such as data transmission and error reporting.
correct option is A) SNMP
Step-by-step explanation:
The protocol designed for managing complex networks among the given options is SNMP (Simple Network Management Protocol). SNMP is used to monitor and manage network devices such as routers, switches, and servers. It operates at the application layer of the Internet Protocol Suite and allows administrators to modify device settings to influence network behavior.
Comparatively, the other protocols serve different purposes. TCP (Transmission Control Protocol) ensures reliable, ordered, and error-checked delivery of a stream of data between applications. UDP (User Datagram Protocol) is used for time-sensitive transmission where speed is preferred over reliability. Lastly, ICMP (Internet Control Message Protocol) is used for diagnostic or control purposes, typically for error reporting.