I cannot ping a site (lucent.com) but i can ping www.lucent.com. Why?
If i can't ping the domain name, does it mean that lucent.com is not
exist. But why i can ping www.lucent.com. Is domain lucent.com exist?
Can anybody explain to me why?
Can linux support Pentium Pro Dual-Processor? I know linux kernel can
support pentium pro but how about dual processor. Is linux using both
processor? If yes, how can i check wheater it is utilizing the dual
processor or not? Any tool to check that?
For sendmail question, if i set up a primary mail server as ServerA
and secondary mail server ServerB and under the MX record ServerA has
preference 5 and ServerB has preference 10. So if the mail to
user1@ServerA arrive, of cource it will send to ServerA first. If
ServerA down it will send to ServerB. So the question, will the mail
send back to ServerA if ServerA is up back?How long the mail will
queue on serverB? If , for instance it queue 5 day, what happen if
after 5 days the serverA is still down?
Thank a lot
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