How to classify the interfaces of AR routers

For AR routers:
Interfaces of a device are used to exchange data and interwork with other devices and can be classified into physical interfaces and logical interfaces, in which:
1. Physical interfaces are real interfaces supported by components and can be further classified into management interfaces and service interfaces.
- Management interfaces: Management interfaces are used to support the configuration and management operations performed by users. Users can use management interfaces to log in to devices and perform configuration and management operations. Management interfaces do not transfer service data.
- Service interfaces: Service interfaces are used to transfer service data and can be classified into LAN interfaces and WAN interfaces. LAN interfaces can be used by routers to exchange data with network devices in the LAN. WAN interfaces can be used by routers to exchange data with devices in the external networks which are far away from the routers.
2. Logical interfaces can implement data exchange but do not exist physically and must be established by configurations. Logical interfaces transfer service data.

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