In the image shown here, what does system B send to system A at step 2 of the three-way TCP handshake?

Case EX 1-1Nicole has not used Excel before and is getting used to the different pointer shapes that Excel shows, depending on the action you are taking.When Nicole moves the pointer to a button on the Ribbon, the pointer changes to a ____.

A. white arrow B. thick white plus sign C. black arrow D. thick black plus sign

Which of the following is a commonly hidden web page element?

A. nav bar B. main heading C. footer D. all of the above