Which DHCP option provides the CAPWAP APs with the address of the wireless controller(s)?
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A. B. C. D.A.
The correct answer is option A (43).
Dynamic Host Configuration Protocol (DHCP) is a network protocol that is used to automatically assign IP addresses and other network configuration settings to devices on a network. One of the key benefits of using DHCP is the ability to centrally manage IP address assignment across a network.
In a wireless network, the wireless access points (APs) are typically managed by a wireless controller. The controller is responsible for configuring and managing the APs, as well as providing centralized authentication and policy enforcement. In order for the APs to connect to the controller, they need to be provided with the IP address of the controller.
This is where DHCP comes in. DHCP option 43 is used to provide the APs with the IP address of the wireless controller(s). Option 43 is a vendor-specific option, which means that it is not part of the standard DHCP options, but is defined by individual vendors.
In the case of Cisco wireless networks, option 43 is used to provide the APs with the IP address of the Cisco wireless LAN controller (WLC). The option consists of a TLV (Type, Length, Value) format, where the Type field is set to 0xf1, the Length field is set to the number of controller IP addresses multiplied by 4, and the Value field contains the IP addresses of the controllers.
In summary, DHCP option 43 is used to provide the CAPWAP APs with the address of the wireless controller(s) in a Cisco wireless network.