Ling Yang

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

Cisco Certified Specialist - Enterprise Core

Juniper Networks Certified Associate, Junos (JNCIA-Junos)

Cisco Certified Specialist - Security Core

Cisco Certified Internetwork Expert Enterprise Infrastructure (CCIE Enterprise Infrastructure)

CX Baseline Training

ONEx Agile Fundamentals

Cisco Certified Network Professional Security (CCNP Security)

Cisco Certified Specialist - Security Identity Management Implementation

Webex Insider User Group

Cisco Certified Specialist - Service Provider Core

Cisco Certified Internetwork Expert Security (CCIE Security)

Cisco Certified Internetwork Expert Service Provider (CCIE Service Provider)

Cisco Certified Internetwork Expert Storage Networking (CCIE Storage Networking)