Patterns and Technical Problem Doing Subnetting

by Romi Satria Wahono 

By the time the hang of teaching and classroom materials in networking subnetting or CCNA, I usually use the method as I wrote in two previous articles: 
1. Understanding the concept of Subnetting2. Subnetting calculationSo far, only smooth-smooth and level of understanding students' good enough. Incidentally yesterday (May 6, 2007) I had the opportunity to try the same method to teach younger kids SMKN Rangkasbitung 1. Understanding can be signed, there were few problems when do the problems for a diverse variety of problems. To be more sharply again, I need to serve a specific topic working techniques subnetting problems with the existing pattern. Let's just say this is the next material from the two previous material. Examples of complete problems can be downloaded from here.1. ASK ABOUT QUANTITY Subnetmask HOST WITH THE TERMS OR SUBNETSubnetmask asking about what should be used to limit the number of host or subnet specified in the problem. To
answer this question we use the formula to calculate the number of hosts per subnet, ie 2y - 2, where y is the number of binary 0 in the last octet Subnetmask. And if that is determined is the number of subnets, we use the formula 2x (way after 2005) or 2x - 2 (way before 2005), where x is the number of binary 1 in the last octet Subnetmask.http://gutheng.blogspot.com/2010/01/pola-soal-subnetting-dan-teknik.html