Which mismatch can cause OSPF routers to lose adjacency?

Two AOS-Switches connect on VLAN 10 in OSPF Area 1, which is defined as a stub area on both.

Which mismatch can cause OSPF routers to lose adjacency?
A . The administrator adds the backbone area to just one of the routers.
B . The administrator enables graceful restart, or nonstop switching, on just one of the routers.
C . The administrator enables jumbo frames on VLAN 10 on just one of the routers.
D . The administrator adds the no-summary option to Area 1 on just one of the routers.

View Answer

Answer: B