Dear Muhammad, TTL means Time-To-Live, it indicates the age of a packets. For logical analogy, it's like our age, each birthday we had will count less to our longevity :( So normally packets are given TTL to prevent packects from circulating endlessly in internetworks. TTL decremented from its default 64 by one each time it visited a hop. So a packet should die if it has reached 64 hops. Hope it helps. Regards, Leonard Ong, CCNP R/S, CCDP R/S, CSE, LCP Leonard Advanced Research,Inc Leonard Ong | A Wise Man said : " Life is Full of Sufferings, (Íõ¶°ºÀ) | Therefor Living as a Human is a Suffering " Cisco | [EMAIL PROTECTED] - Share Knowledge together! FreeBSD/Linux| UIN : 1041402 == http://www.poboxes.com/Leonard_Ong Powered | 68FB C87E 8A0D EC9F EC82 A6FC C547 B4E4 CA46 94DB ------------------------------------------------------------------ ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]