As shown in the figure, when OpenStack creates a VM, which of the following services is not required?

• A.Heat
• B.Nova
• C.Glance

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When the cloud server suffers catastrophic damage, such as a system crash, the cloud server cannot start normally, the cloud server fails and cannot perform any operations, etc. The user has created a snapshot of the system disk in advance and the cloud server does not have a data disk.
At this time, which of the following methods can the user take to restore the cloud server?
(Multiple choice)

• A.Create a new disk from the failed cloud server system disk and mount it to the new cloud server (the new cloud server system disk has been unmounted)
• B.Create a new system disk from the snapshot of the failed cloud server system disk and mount it to the failed cloud server as a data disk.
• C.Create a new system disk from the snapshot of the failed cloud server system disk and mount it to the new cloud server (the new cloud server system disk has been unmounted)
• D.Modify the status of the failed cloud server system disk and mount it to the new cloud server (the new cloud server system disk has been unmounted)

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In Huawei Cloud Stack, for cloud servers that store core data, using intranet DNS to provide domain name resolution services can better ensure the security of core data than directly binding EIP. At the same time, it can also realize the control of core data. access.

• A.True
• B.False

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In Service OM, which of the following descriptions about creating an external network is incorrect?

• A.Before creating an external network, it is recommended to first configure the VLAN or subnet for the user to create an external network on the switch.
• B.If the network type is "LOCAL", the packets of ECS created using this network will not enter the physical network.
• C.The external network used for Elastic IP can be used for VPN services at the same time
• D.If the network type is "VLAN", the packets of the ECS created using this network will not enter the physical network.

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In the desktop login connection process of FusionAccess (without going through the vAG gateway), the HDC component will only generate () ticket.

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