# TTL

The operating system sets the initial TTL value or application creating the IP packet. Here are some common default TTL values:

<table border="1" id="bkmrk-operating-system-ttl" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 50.0596%;"></col><col style="width: 50.0596%;"></col></colgroup><thead><tr><td>**Operating System**</td><td>**TTL Value**</td></tr></thead><tbody><tr><td>**Linux/MAC OS, Android, Juniper**</td><td>64</td></tr><tr><td>**Windows 95, 98, NT**</td><td>32</td></tr><tr><td>**Windows**</td><td>128</td></tr><tr><td>**Cisco Routers**</td><td>254</td></tr><tr><td>DNS</td><td>Depends on resolver (can range from 128 to 86400)</td></tr></tbody></table>