What are some of the challenges associated with session management in distributed systems, and how does the session layer address them?

Some challenges in distributed systems include ensuring data consistency, managing session state across multiple nodes, and handling network failures gracefully. The session layer addresses these challenges by providing mechanisms for session checkpointing, recovery, and synchronization. It enables distributed applications to maintain consistent session state across multiple nodes and recover from network failures or interruptions without losing data integrity. Additionally, session-layer protocols support features like distributed transactions and fault tolerance to ensure reliable communication in distributed environments.