The wireless network speed is very slow, but the wired network speed is very fast situation is divided into two kinds: the first kind: channel interference problem: there are too many nearby routers, and the automatic default channel is generally 6, check to search whether there are many nearby routes, it is recommended to change the channel to 11, test it.
I connected to the cable network speed is very fast wireless network speed is slow, this is a normal phenomenon, because the wireless network is unstable, it may also be related to the channel Settings of the router.