Symantec certifications are the most popular and reputed certification all over the world and have set a standard in the IT industry when it comes to the job selections. The 251-510 exam is intended for IT professionals and IT Specialist who work is typical complex network environment of medium to large companies. The 251-510 student should have at least of six months experience in networking administration and operating systems environment that have more than thousand users, more than two physical locations, more than two domain controllers, network resources and services, e.g. remote access, firewall, intranet etc and virtual private networking between two physical locations.