Which of the following descriptions is correct about BGP MED? (Multiple choice)
A . By default, if there is no MED value in the route attribute, press 0 to process. If the bestroute med-none-as-maximux command is configured, the MED is processed as the maximum value of 4294967295.
B . By default, BGP routing rules can perform MED comparisons on routers from different autonomous systems.
C . In the BGP routing rules, the priority of the MED is lower than AS-Path, Preferred-Value, Local-Preference and Origin.
D . The default value of BGP route MED is 0.
Answer: ACD