Which of the following are the purposes of entrance facilities in a structured cabling scheme? $($Select two.$)$

To act as a primary storage area for network documentation and manuals

To house the building's wireless networking equipment exclusively

To mark the point at which external cabling is joined to internal cabling

To join the local exchange carrier $($LEC$)\text{'}$s network and for inter$-$building communications

To serve as the main distribution frame $($MDF$)$ for the entire building