A.Enable the global DHCP function

B.Enable the global DHCP snooping function

C.Configure the interface trust state

D.Enable DHCP Snooping on an interface or VLAN

A.Stalling in ExStart state may be due to MTU mismatch between neighboring routers

B.For a pair of DR Others on an Ethernet link

C.The two router databases are synchronized, and an error occurs in the SPF calculation. It must be because the router ID is duplicated

D.Stalling in the lnit state indicates that the router has received the neighbor's Hello packet, but the Hello packet does not contain the OSPF Router ID of the router

A.Terminals connected to the operator's network through the same C may belong to different sites (MCE)

B.Under no circumstances can different sites belonging to the same VPN use overlapping address spaces

C.The two networks that are geographically separated must belong to different sites

D.A site is a group of IP systems, and a network composed of a host cannot be called a site

A.The IS-IS interface type of the GE0/0/1 interface of R1 is Leve-1

B.The IS-IS interface type of the GE0/0/0 interface of R1 is Leve-1-2

C.IS-IS IPv6 is not enabled on the GE0/0/1 interface of R1

D.IS-IS IPv6 is enabled on the GE0/0/0 interface of R1

A.Air conditioning system

B.Storage Devices

C.server

D.Network equipment