单项选择题How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network?()
A.It maintains DHCP leases on behalf of subscribers.
B.It initiates DHCP requests on behalf of subscribers.
C.It passes DHCP traffic to and from the server;you must configure static host routes.
D.It passes DHCP traffic to and from the server and inserts host routes into its routing table.