1. the other day my ISP while providing me my IP told that i m into IP Block 30. what does that mean?
2. i have seen my administrator type the following:

192.168.0.0/24, is this related to my 1st question? if so, pls someone clear my doubts. i would be really thankful.

thanks

Ratnakar

"IP block 30" could mean anything. Carriers get IPs in block from ARIN, and then ISPs get the IPs from a carrier (usually, if they're small ISPs any way). Companies usually buy IPs from ISPs, unless the company is very large...

So the ISP might have 45 IP blocks from ARIN and maybe they just exhausted the first 29 blocks already and they just started the 30th. Who knows?

What you saw was your admin typing a bitmask notation of a group of IP addresses. The netblock 192.168.0.0/16 is reserved for private use, only inside a network (not on the Internet) so those IPs would be local, not from your ISP.

chort, CISSP,

thanx for the reply. it was really quick.

but if i m on pool 30 or 192.168.0.0/16, does that mean i would not be able to ping any1else other than ppl on the same pool?

>Carriers get IPs in block from ARIN
or if they are outside north america, from ripe, apnic or their delagates.

>does that mean i would not be able to ping any1else other than ppl on the same pool?

you should be able to ping any machine on the internet that is set to respond and not firewalled.

thanx a lot guyz...

i think i got my doubts cleared for this...

ratnakar