A customer network is set up as follows: HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2-- GE0/0----HostB The WAN supports only the synchronous mode. If the Serial 1/0 interface of MSR- 2 must…

A customer network is set up as follows:

HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2-- GE0/0----HostB The WAN supports only the synchronous mode. If the Serial 1/0 interface of MSR- 2 must obtain an IP address through negotiation with the peer router MSR-1, the Serial 1/0 interfaces of the two routers can run ______. (Choose one or more)