Takahisa Takebuchi

Cisco Certified Network Associate Routing and Switching (CCNA Routing and Switching)

Cisco Certified Network Professional Routing and Switching (CCNP Routing and Switching)

Cisco Certified Design Associate (CCDA)

Cisco Certified Network Professional Collaboration (CCNP Collaboration)

Cisco Certified Network Associate Collaboration (CCNA Collaboration)

Citrix Certified Professional - Networking (CCP - N)