CCNA certification means that individuals have the ability to install, configure, operate and troubleshoot medium-sized routing and switching networks. Professionals who have obtained CCNA certification can establish connections with remote sites through WAN, and be familiar with and use IP, EIGRP, RIPv2, VLAN, Ethernet and access control lists. Generally, it is widely recognized in the field of computer network, and it has certain competitiveness and career development advantages for people engaged in network engineers, system administrators, network technical support and other related occupations.