The most frequently used certification exams cover the areas of CompTIA Network+. These certifications are highly sought after by employers for entry-level positions.
The CCNA certification is intended for people who want to learn to configure networks devices such as switches, routers, firewalls and switches. It covers topics such IP address, VLANs network protocols, wireless LANs, and IP addressing.
The MCSE exam focuses primarily upon software engineering concepts. These include Active Directory management, Windows Server 2008 and 2012 administration, and remote desktop troubleshooting.
Finally, the CompTIA Network+ certification tests candidates' knowledge of networking technologies used in both wired and wireless environments. Candidates must know how to set up, manage, and secure networks. This certification will include questions that cover topics such TCP/IP basics as VPN implementation, optimization, wireless LAN deployment, troubleshooting, and VPN configuration.
You might find training programs offered by companies for these certifications. This will allow you to practice your skills before taking the exam.