Keep your message simple. Provide enough background to help your audience understand the topic without overwhelming them. Avoid technical jargon. Eliminate as many acronyms and buzzwords as possible when explaining a complex issue. Use analogies to simplify technical details.
Diagrams can also help to clarify concepts.
Try not to make anyone feel incompetent. If you don't have an answer to a problem, admit it. It's better to tell someone that you'll get back to him or her later with the solution. It's important to seize every opportunity to enhance your skills because new technologies are introduced constantly. Committing to lifelong learning to improve your technical abilities will play a major role in your future marketability and success on the job.