What is one method for HPE Aruba Networking ClearPass Policy Manager (CPPM) to use DHCP to classify an endpoint?

Question

Options

• AIt can determine information such as the endpoint OS from the order of options listed in Option 55
• BIt can respond to a client's DHCP Discover with different DHCP Offers and then analyze the
• CIt can snoop DHCP traffic to register the clients' IP addresses. It then knows where to direct its
• DIt can alter the DHCP Offer to insert itself as a proxy gateway. It will then be inline in the traffic flow

• A
  79% (26)
• B
  12% (4)
• C
  6% (2)
• D
  3% (1)

Explanation

HPE Aruba Networking ClearPass Policy Manager (CPPM) uses device profiling to classify endpoints, and one of its passive profiling methods involves analyzing DHCP traffic. DHCP fingerprinting is a technique where ClearPass examines the DHCP packets sent by a client, particularly the DHCP Discover packet, to identify the device's operating system or type based on specific attributes. Option A, "It can determine information such as the endpoint OS from the order of options listed in Option 55 of a DHCP Discover packet," is correct. DHCP Option 55 (Parameter Request List) is a field in the DHCP Discover packet where the client specifies the list of DHCP options it requests from the server. The order and combination of these options are often unique to specific operating systems or device types (e.g., Windows, Linux, macOS, or IoT devices). ClearPass maintains a database of DHCP fingerprints and matches the Option 55 data against this database to classify the endpoint.

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