On Tue, Jun 12, 2012 at 11:51 AM, Manokaran K <[email protected]> wrote:
> On Tue, Jun 12, 2012 at 11:23 AM, Suraj Kumar <[email protected]> wrote: > > > On Sat, Jun 9, 2012 at 2:22 PM, Girish Venkatachalam < > > [email protected]> wrote: > > > > > > > > We should learn 3 special network blocks , 10.0.0.0/8, 172.16.0.0/12 > > > and 192.168.0.0/16 which > > > are not globally unique. > > > > > > > This is not technically mandatory anymore. CIDR replaced the class-based > > network addressing scheme a long time ago. > > > > > AFAIK, CIDR only dispenses with the need to have rigid network address > space and make it network admin definable for his/her convenience. The pvt > network blocks still exist and packets meant for it are not allowed to > enter the internet. > > Or am I wrong? > You are right. classful addressing still exists in various parts of the Internet. CIDR is technically backwards compatible and hence allows this to exist. Hence I used the phrase "this is not *technically mandatory* anymore" (ie., the choice is upto you to implement CIDR / classful routing). This can be compared to IPv4 vs IPv6: even if IPv6 becomes widely used, it may still help to learn about "our history" by knowing about IPv4. Yet, if one is expected to setup a network, it would be short-sighted/foolish to setup an IPv4-only network. This is all I wanted to point out. cheers, -Suraj -- Career Gear - Industry Driven Talent Factory http://careergear.in/ _______________________________________________ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
