Dear all! Why I use telnet command to connect the remote host, in same LAN, with the IP address (telnet 192.168.110.X) , the prompt "login" is to slow appears!If the telnet daemon need to resolve the host name no matter with using the IP address! If I add the host name & IP in /etc/hosts, then the telnet prompt appears quickly, Why ?

You answered you own question. Telnet is trying to do a reverse DNS lookup.

Jerry is correct... telnet is trying to do a reverse DNS lookup. At my former place of employment, we had a similar problem with AIX (after upgrading from 4.2 to 4.3) where I ended up modifying the inetd.conf (if I remember correctly). Basically, you need to modify the line which contains info regarding the telnetd by adding a switch such as "-a". I would tell you exactly but unfortunately I no longer have access to the machines I changed this on. Note: you will still have issues with all other inetd services such as ftp unless those are changed as well. Although this isn't a Linux issue, the following doc provides a better explanation of the issue. http://www.linuxgazette.com/issue38/tag/32.html Hope this helps, Dallas.