TTLbased
TTLbased refers to systems, components, or policies that rely on a Time-To-Live (TTL) value to govern the validity or duration of data, sessions, or messages. TTL is a countdown after which the item is considered expired and typically discarded or refreshed. TTLbased designs apply across networking, caching, and distributed systems.
In networking, TTL concepts appear in the IP layer as a field that is decremented by each
TTL-based caches store items with a defined expiry time. When the current time passes the expiration, the
Designers choose TTL values based on update frequency, traffic patterns, and acceptable data staleness. Short TTLs
TTL-based approaches have security and reliability implications. DNS TTLs interact with cache-poisoning risks and DNSSEC for