CCNA is a network technology certification of Cisco, it is Cisco's network equipment manufacturers to launch a kind of intermediate certification, can be enough to help beginners quickly understand the standard configuration and commands of the network equipment, so as to realize the network operation and maintenance, management and security aspects of the work to lay a solid foundation.CCNA certification is a network technology certification exam, which can be enough to help students understand the Computer network parts, security, routing, switching, WAN technology, as well as IPv6 and other basic knowledge and skills of network technology. Having CCNA certification not only provides more opportunities for individuals in the job market, but also helps companies find more professional network engineers to improve the security and stability of the corporate network.