Q2: List the TCP/IP (DOD/Internet) reference model layers and their PDU

In windows explorer, select the file, folder, or groups of files and folders you'd like to copy. you can select multiple files or folders in several ways: click the first file or folder you want to select, hold down the ctrl key, and then click each additional file or folder you want.

Iwould try the first option, first then if that didn't work i would try the last option.