多选题Which two forwarding classes have bandwidth assigned when CoS is not explicitly configured in JUNOS software？（）ABest effort（BE）BNetwork control（NC）CAssured forwarding（AF）DExpedited forwarding（EF）
题目
多选题
Which two forwarding classes have bandwidth assigned when CoS is not explicitly configured in JUNOS software？（）
A
Best effort（BE）
B
Network control（NC）
C
Assured forwarding（AF）
D
Expedited forwarding（EF）