A.session
B.network
C.physical
D.data link
E.transport

A.EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.
B.EIGRP uses a hello protocol to establish neighbor relationships
C.EIGRP uses split horizon and reverse poisoning to avoid routing loops.
D.EIGRP uses periodic updates to exchange routing information
E.EIGRP allows routers of different manufacturers to interoperate
F.EIGRP supports VLSM and authentication for routing updates.
G. EIGRP use a broadcast address to send routing information.

A.show running-config
B.show processes cpu
C.debug all
D.logging host ip address

A. spanning-tree mode rapid-pvst
B. spanning-tree uplinkfast
C. spanning-tree backbonefast
D. spanning-tree mode mst

A.Router(config)#password-encryption
B.Router(config)#service password-encryption
C.Router#service password-encryption
D.Router# password-encryption