The CCNA (Cisco Certified Network Associate) certification is the first in Cisco’s line of certifications that an aspiring networking professional must acquire in order to add value to their IT career. The CCNA certification validates a firm foundation of networking skills that include fundamentals like the OSI Reference Model, Networking Protocols, Layer 2 Switching Concepts and Protocols, Routing Concepts and Protocols, and Wide-Area Networking (WAN) Connectivity. Thus a person who is aiming to qualify for the CCNA certification should be proficient in their abilities to provide basic network installations and troubleshooting. CCNA Composite Exam: The 200-125 CCNAX is the composite exam associated with the Cisco CCNA Routing and Switching certification. Candidates can prepare for this exam by taking the Interconnecting Cisco Networking Devices: Accelerated (CCNAX) course. This exam tests a candidate’s knowledge and skills required to install, operate, and troubleshoot a small to medium size enterprise branch network.