In the Hub&Spoke network shown in the figure, in order to achieve correct routing transmission, the administrator must manually configure the command peer10.1.2.1() (all letters are lowercase) in the BGP-VPN_out view of the Hub-PE.

On the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is 10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that the LSA is generated by R2 and describes the IPv6 prefix address associated with the Router-LSA.

When the switch is configured with port isolation function, by default, different hosts belonging to the same VLAN cannot communicate at layer 1 and layer 3.

If the technical migration actions performed on the network will affect the existing network operations, the pre-set operating procedures and risk control measures must be strictly followed when implementing the technical migration project. Such projects are generally defined as cutover projects.
Which of the following operations performed in the existing network is a non-cutover item?

Which of the following reasons will cause Telnet login failure of network devices? (Multiple choice)