Question

Elaborate the architecture of NOX and POX controllers of SDN with their comparison.

Answer 1

Feature	NOX Controller	POX Controller
Language	C++	Python
Architecture	Modular and Event-Driven	Modular and Event-Driven
Modules	Allows the implementation of various modules for specific functionalities. Each module can handle different aspects of network control.	Follows a modular architecture with separate components for different tasks.
Event Handling	Responds to events generated by the network, such as link changes or new hosts joining.	Event-driven architecture to handle network events efficiently.
Packet Processing	Processes packets in an event-driven way, making decisions based on the current state of the network.	Packet processing is a fundamental aspect, and decisions are made based on the network state.
Topology Discovery	Includes modules for discovering and maintaining the network topology, identifying the locations of switches and hosts.	Capable of discovering and managing network topology, ensuring an updated view of the network.
Flow Management	Manages flows in the network, determining how traffic should be forwarded based on network policies.	Handles flow management, deciding how data packets should traverse the network based on the established policies.
Programming Language Support	Primarily C++	Primarily Python
Community Support	NOX development has slowed down, and it may have less active community support.	POX is a more recent development and may have a more active community.