Dear Shinder-san, I started to read/study/enjoy your book carefully in these days. Though I have not yet finishing it up throughly for the 1st run, I would like to confirm the supposed mistyping I have found before I forget: 1) P-256 Figure 4.7 & P 258 Table 4.4: following the naming rule, it shall be "ISAREMOTE" I/O "REMOTEISA", in rest part of your book, "ISAREMOTE" is refered. 2) P-257 Table 4.3: Wins IP for Exchange 2003BE is 10.0.0.2 I/O 10.0.1.2 3) P-295: The line "There are three route relationships availabe when create a Network Rule" shall be read as "...two route relationships..." In addition to that I think it is better to inidicate disksize allocation for each of VM machine in your Table 4.3 & 4.4 on page 257-258. With regards, Roy Tsao