Which two of these are recommended practices with trunks？ （）

• A、 use ISL encapsulation
• B、 use 802.1q encapsulation
• C、 set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation
• D、 use VTP server mode to support dynamic propagation of VLAN information across the network 
• E、 set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation.