| 摘要 |
Each client device among a group of client devices whose access to a network is controlled by the same Network Access Control server will have a unique physical address. However, the same physical address may exist among a group of client devices controlled by different Network Access Control server. To detect and block clone devices from obtaining service, each Network Access Control server will have its own identifier and this identifier is one of the authorization parameters used by the Dynamic Host Configuration Protocols server for determining whether the request for an IP address is from an authorized client device.
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