What is the difference between a software engineer and a system analyst?

Look at the far left lane in the picture. explain what the red car is doing and what it needs to do to travel safely.

David is in week 3 of his current ashford course and has a paper due by monday night at midnight. he has finished everything but the concluding paragraph. as he boots up his computer to work on it, he sees a flash across the screen and then the screen goes black. he begins to panic as he tries desperately to turn the laptop back on. david should have saved his work on what kind of portable device?

This device directs network traffic. bridge hub nic repeater router switch