APPLICATION LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In-Band
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Off-Band
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Out-of-Band
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Under-Band
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Detailed explanation-1: -Because FTP uses a separate control connection, FTP is said to send its control information out-of-band. In Chapter 6 we shall see that the RTSP protocol, which is used for controlling the transfer of continuous media such as audio and video, also sends its control information out-of-band.
Detailed explanation-2: -In-band means sending commands in an operating system through a standard NVMe driver and commands, while out-of-band means outside of the operating system knowledge, most commonly done with a host BMC through the SMBUS protocol, but now can be done over PCIe vendor defined messages as well.
Detailed explanation-3: -Out-of-band channels include local, non-network accesses to systems; network paths physically separate from network paths used for operational traffic; or non-electronic paths, such as the U.S. Postal Service.