On Sunday 24 Aug 2008, Girish Venkatachalam wrote: > On 10:20:52 Aug 24, Arun Khan wrote: > ^^^^^^^^^^^^ > > > For Class C address space c1.c2.c3.0 and c1.c2.c3.255 are reserved > > for the network number and broadcast number respectively. They are > > not supposed to be used as host ip numbers. > > Classes are passe. Gone forever from the face of Internet.
So are the RFCs on network classes obseleted? > Today it is CIDR. True, but still you cannot randomly pick IP blocks for assignments within your network. Contiguous blocks are split or consolidated with sub/super netting. > You could have an IP 192.168.0.1 but not an IP that ends in .0 like > 192.168.1.0 since both 192.168.1.255 and 192.168.1.0 are used for > broadcast. Even in CIDR, all 0s in "host bits" identifies the network (e.g. .0 for /24) and all 1s in "host bits" is the broadcast (e.g. .255 for /24). For routing table entries I (and have seen others) use .0 for network and not .255. Maybe for ping purpose .0 and .255 tantamount to broadcast? -- Arun Khan _______________________________________________ To unsubscribe, email [EMAIL PROTECTED] with "unsubscribe <password> <address>" in the subject or body of the message. http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
