The specific time needs to be considered in combination with personal ability. If you have good strength, you can come down in about 10 days.

CCNA certification shows the ability to install, configure, operate and troubleshoot medium-sized routing and switching networks. Professionals who have obtained CCNA certification have the corresponding knowledge and skills, can establish connections with remote sites through wide area networks, eliminate basic security threats, and understand the requirements of wireless network access. CCNA training includes (but is not limited to) the use of the following protocols: IP, EIGRP, Serial Line Interface Protocol, Frame Relay, RIPv2, VLAN, Ethernet and Access Control List (ACL).