CCNA OSPF troubleshooting: Cisco CCNA and ICND2 exam prep

David Bombal (CCIE  #11023 Emeritus) passed his Cisco Certified Internetwork Expert Routing and Switching exam in January 2003 and is one of a small percentage of Cisco Engineers that pass their CCIE labs on their first attempt. 

David qualified as a  Cisco Certified Systems Instructor (CCSI #22787) many years ago! He has been training Cisco  courses for over 15 years and has delivered instructor led courses in various  countries around the world covering a wide range of Cisco topics from CCNA to  CCIE. 

David is very active on social media and has over 500,000 YouTube subscribers and has posted over 1,000 free videos.