It's probably no surprise by now that the first byte is the extension introducer which is 21 . The next byte is always FE which is the comment label . Then we jump right to data sub-blocks containing ASCII character codes for your comment. As you can see from the example we have one data sub-block that is 9 bytes long. If you translate the character codes you see that the comment is "blueberry." The final byte, 00 , indicates a sub-block with zero bytes that follow which let's us know we have reached the end of the block.
In summary, we've learned that data can be recovered from a disk even if it has been formatted. R-Studio provides two primary tools for recovering data from formatted disks and partitions, both of which are very powerful. In most cases, R-Studio can simply "unformat" a disk by detecting and restoring the partition that existed prior to formatting. Alternately, R-Studio can recover files by performing an Extra Search for Known File Types. This locates recoverable data even if the partition where the files were previously located cannot be detected. Using one or both of these technologies, R-Studio lets you salvage your important data from a purposefully or inadvertently formatted disk.
Logical Network topology is also called signal topology. Every LAN has a topology, or the way that the devices on a network are arranged and how they communicate with each other. The way that the workstations are connected to the network through the actual cables that transmit data -- the physical structure of the network -- is called the physical topology. The logical topology, in contrast, is the way that the signals act on the network media, or the way that the data passes through the network from one device to the next without regarding to the physical interconnection of the devices.