Entries in the ARP cache typically have a default timeout period, after which they are removed if not refreshed. The duration can vary based on the operating system and its configuration, but common default values are:
- Linux: Usually around 60 seconds for dynamic entries.
- Windows: Typically around 2 minutes (120 seconds) for dynamic entries.
- macOS: Generally around 20 minutes for dynamic entries.
These values can often be adjusted through system settings. Static ARP entries, on the other hand, do not expire unless manually removed.
