Bryan J Smith wrote: > On Wed, Jul 16, 2014 at 3:27 AM, Alessandro Selli > <alessandrose...@linux.com <mailto:alessandrose...@linux.com>>wrote: > > G. Matthew Rice wrote: > > [...] > > > So, final vote guys: - explicitly mention CIDR notation? (I've > always > > considered it a given) - explicitly mention VLSM? (also always > > considered it a given) - include Class A, B, C networks? (we used to > > have it but dropped it; I always considered it a little bit of an > > archaic way of referring to subnets; plus internal networks > don't care > > and most people have their public IPs assigned/subnetted for them) > > TTYL, --matt > > My vote is in favour of CIDR and VLSM notation, and against mention of > A, B and C network classes. > > I understand that IANA assignes IPv4 blocks as classes and the way in > -arpa > .add > r zones work, but this is knowledge of sysadmin level, not of LPIC-1 > (plain user) level. > > > Again, the in-arpa.addr is only _one_ "real world" case where it's > _important_ to know the Classful A, B and C. LPIC-1 is supposed to be > "foundational,"
It's foundational to what end? System administration? Network administration? Security? LPIC-1 is not foundational to everything Linux. It's foundational to an end user perspective and to basic Linux-box setup and troubleshooting. IMHO these users need not know about RFCs, classless IN-ADDR.ARPA delegation zones, libc/POSIX APIs or AES-CBC vs. AES-XTS ciphers. > so why are we doing our best to skip such an elementary concept? Reverse DNS delegation zones are elementary to a higher level of professional competence that LPIC-1 is designed to certify (how many LPIC-1 certified people are going to deal with IANA block assignment policies?). And network classes are outdated. > Introduce the common IPv4 /8, /16 and /24 CIDRs as examples, noting > they are the Classful A, B and C subnets. What really matters is not how difficult is is to explain, but whether there are going to be questions asked in the exam. Then, like Anselm just pointed out, each one will be free to beef up his/her own courseware the way they like (and can). > After all, one is also going to have to introduce the IPv4 Reserve > Private Subnets as well. It's all intertwined and should not be > ignored -- especially not when a junior admin is going to still run > "ip addr" and should know -- Blooms Knowledge and Understanding level > -- what address block he/she is looking at. To this end, CIDR is enough. [...] > P.S. If you haven't noticed, I'm at odds with how IPv6 (and even IPv4) > is often taught. We teach people so much cruft and ignore the most > important, practical things. I know, the world just *suks* :-) Bye, Alessandro _______________________________________________ lpi-examdev mailing list lpi-examdev@lpi.org http://list.lpi.org/cgi-bin/mailman/listinfo/lpi-examdev
