List the layers in the TCP/IP model, and give a brief explanation of each.
What will be an ideal response?
The TCP/IP consists of 5 layers. The layers and their short explanation are as follows:
? Layer 1: Physical: Protocols in the Physical layer specify details about the underlying
transmission medium and the associated hardware.
? Layer 2: Network Interface Protocols in the Network Interface layer specify details
about communication between higher layers of protocols and the underlying network.
? Layer 3: Internet: Protocols in the Internet layer form the fundamental basis for the
Internet. Layer 3 protocols specify communication between two computers across the
Internet.
? Layer 4: Transport: Protocols in the Transport layer provide for communication from
an application program on one computer to an application program on another.
? Layer 5: Application: Protocols in the top layer of the TCP/IP stack specify how a pair of
applications interact when they communicate.
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In the Windows operating systems, deleting a file from the Recyle Bin performs which of the following actions on the data stored on the surface of the medium?
a. Nothing happens to the data at this point. It is simply moved from the original folder to a hidden folder in the Recycle Bin. b. Nothing happens to the data at this point. The allocation marker for the file is simply reset. c. A random deluge of zeroes and ones is copied over the original data. d. The entry for the file is purged from the $MFT metadata file in the file system.