First, I was due to the very different statements regarding. The volume of the built-up fan a bit skeptical, but as I quickly and cost needed a new 24port switch, I still dared buying. The price was enticing and for fast delivery Amazon's hard not to beat up. First, for the better and the reason for the 4 stars: The switch is very solid built, brings all necessary mounting hardware for use in a (in my case, even screwed) 19 '' - rack and has a reasonable array of LED control panel and RJ45 ports. While ports with integrated LEDs in many computers are now common, a little caution is there but attached as ever like to take these ports with frequent plugging and unplugging but harm. Moreover, the LEDs are arranged so as separately here much more recognizable, yet easily associate the unique identifier. Particularly positive is compared to my previous combination of 5port Gigabit switch and 16Port 100Mbit switch that even in direct communication between two previously connected already via Gigabit devices somehow the handbrake has been removed - the data throughput is significantly better, so that the upgrade was worthwhile in any case. A connected in the network QNAP NAS with two Gigabit Ethernet ports in load balancing mode has now again risen in cooperation with the computers used in the house properly to performance - also the backup multiple Macs via Time Machine is the same wonderful swiftly vonstatten. Where there is light, but is also shadow: The different evaluation of the fan noise level, I can only emphasize: I have some fans (especially those 4cm-dwarfs) experienced, and by loud singing to nearly inaudible whisper everything was there. In my case, the switch is in the basement in a completely open rack, and that in addition to the QNAP with four large panels there. The fan of the switch is significantly louder than the QNAP with the plates and two own fans which are adjusted upward to lower the temperature. However, he does not bother at least by loud singing and the rest is negligible in an otherwise used as a storeroom cellar. However, it is completely unsuitable for use in an office / study. Whether and at what load the fan principle is required at all, she will not reveal to me. Even after now already two days of intensive continuous use is only "cold air" on the side out, and it is not even particularly much. Maybe a little too much of a good thing has been done here for the sake of operational reliability. A little less fan speed when more Leisigkeit would not be bad - If you look at but the prices for really quiet small fan on, it is understood that in pricing such a thing probably was not in it. The other shortcoming relates probably more on my NAS as the switch, since the behavior with other switches, however, was not so, I'll give you half of the debt to the TP-Link Switch: When reconnecting the (in operation located) on the NAS new switch lost this the network link and recognize not the newly connected switch. Switching back to the old switch (or another still lying around in reserve) went smoothly, to recognize the new switches but was - a reboot required - totally unusual. Then the machine was communicating with the switch as if she had never done anything else. What was it? No idea, but very unusual. The "star deduction" there but exclusively for unnecessary loud fan. Otherwise, a really recommendable device in which I can be sure, even in the foreseeable future the ports not vollzukriegen.