The following are download links to my videos,these are educational videos explaining different subjects:

CCNA Security Principles

Explanation for the most important principles for network security and class of  attacks and how to mitigate them and a fast overview for the latest programs used in attacks.

WAN1

WAN 2

Explanation for the WAN technology concepts and definition for WAN connection types and details about for WAN incapsulation protocols which will be used with these connection types including PPP, HDLC, frame relay.

IP v 6.

Explanation for the concept and the structure of IP v 6,different types and the difference between it and IP v 4

Route summarization

Explanation for how the router summarizes different routes and send them as one route.

VLSM

Explanation for the variable length subnet mask, how to subnet network with VLSM techniques.

Please visit www.cbtme.com to see and download the rest of my educational videos.