Which two forwarding classes have bandwidth assigned when CoS is not explicitly configured in JUNOS software？（）

A.Set the next hop.
B.Discard packets.
C.Set the loss priority.
D.Sample the packet content.

A.Log packet.
B.Count packet.
C.Set packet metric.
D.Decrement packet TTL.
E.Change destination IP address.

A.firewall filters
B.data encryption
C.routing protocol authentication
D.support for BGP path mtu discovery
E.automatic discovery for IPSEC neighbors