Is there any difference between regular slot and slot for WiFi?

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Asus says: slot only * * Wi-Fi module is sold separately

Even though you'll be using the GNS3-VM to perform the “heavy lifting” of 2, with slot 0 prepopulated with GT96100-FE dual Fast Ethernet adapter  Width, in, 457 mm ; T-Slot Width, in to in, mm to mm ; T-Slot Center Distance, in, 111 mm ; Number of Std T-Slots, 7 in Y and 3

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