Final answer:
Reducing session TTL can enhance security by expiring sessions faster and decrease memory usage, which can boost performance.
Step-by-step explanation:
Reducing the session Time to Live (TTL) in a network configuration is done for several reasons, one of them being to enhance security. A lower TTL means that the session will expire more quickly, which can help in reducing the risk of unauthorized access as any compromised session will be cut short. Another reason to reduce session TTL is to decrease memory usage. Each session occupies a certain amount of memory, and by ensuring that sessions do not linger unnecessarily, system resources can be conserved, thereby potentially improving overall system performance.