$9.$ What two actions are taken $($i$.$e$.,$ frames are sent$)$ by the host in the trace just after

t$=49,$ to end the association with the $30$ Munroe St AP that was initially in place

when trace collection began? $($Hint: one is an IP$-$layer action, and one is an

$802\mathrm{.}11-$layer action$).$ Looking at the $802\mathrm{.}11$ specification, is there another frame

that you might have expected to see, but don$$t see here?