70-222 exams of Microsoft certification are assistive in computing Windows NT 4.0 to windows 2000 with the complete understanding of DNS, WINS, TCP/IP and DHCP etc. 70-210 exams of Microsoft certification are supportive in installing, administering and configuring Microsoft windows 2000 professional for MSCE and MCSA candidates so that they maintain the designation and operation of windows server 2000. 70-229 exams are the main source of designation and implementation of MS SQL server 2000 which are necessary for IT database administrator to establish IT business successfully. 70-216 exams are very helpful in implementing and administering MS windows 2000 network infrastructure which are very recommendable for IT professionals who want to work in the competitive environment. 70-225 exams are very important in evaluating business requirements, reviewing existing and planned resources, designing and deploying exchange 2000 server messaging solution, etc.