Authors and Network Test Experts

Pearson is the world's learning company, with expertise in educational courseware and assessment, and a range of teaching and learning services powered by technology.

Wendell first entered the world of TCP/IP back in 1990, when TCP/IP began to replace proprietary protocols in corporate networks, supporting IBM's new TCP/IP products, routers, and LAN products while still at IBM.

Kevin a Cisco Certified Systems Instructor (CCSI No. 20061) with two CCIEs (#7945), one in Route/Switch and one in Collaboration. He also holds multiple Cisco professional and associate-level certifications.

Keith Barker began as a network technician for Electronic Data Systems (EDS) in 1985, and has had experience in IT and networking for over 25 years

CCIE No. 4594, is a network engineer for a large university healthcare network based on Cisco wireless products. David has bachelor's and master's degrees in electrical engineering from the University of Kentucky.

Is a Cisco Certified Systems Instructor (CCSI) who has dedicated his IT career to teaching others

David has more than 20 years of technology experience spanning a variety of roles, and tries to share as much of this experience with his readers (and watchers) as possible.

Throughout his 30 years in IT he has worked as an employee, contractor, and consultant for several companies including Platinum Technologies, Fujitsu, IBM, State Farm, and MindSharp, among others.

I am a Network Engineer with many years in the field and an eternal student. This gives me a unique understanding of what a student requires to succeed.

Mark has worked with computers and related technologies since 1983, and specializes in technology education through training, writing, and public speaking

Sari Greene is an information security practitioner, author, and entrepreneur. In 2003, Sari founded one of the first dedicated cybersecurity consultancies.

Bio to come...

Omar Santos is an active member of the cyber security community, where he leads several industry-wide initiatives and standards bodies.

John Stuppi, CCIE No. 11154, is a technical leader in the Security Intelligence Operations (SIO) organization at Cisco where he helps customers leverage their Cisco infrastructure to overcome emerging security challenges.

Aaron Woland, CCIE No. 20113, is a principal engineer in Cisco’s Advanced Threat Security group and works with Cisco’s largest customers all over the world.

Mason Harris, CCIE No. 5916, is a solutions architect for Cisco, focusing on cloud architectures with Cisco's largest global customers.