Which DHCP option helps lightweight APs find the IP address of a wireless LAN controller?
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A. B. C. D.A.
The correct answer to the question is A. Option 43.
Dynamic Host Configuration Protocol (DHCP) is a client/server protocol that automatically assigns IP addresses and other network configuration parameters to network devices. Lightweight Access Points (LAPs) are wireless access points that rely on a Wireless LAN Controller (WLC) to manage the network and its access points.
Option 43 is a DHCP option used by Cisco Aironet Lightweight Access Points to find the IP address of a Wireless LAN Controller. When an LAP boots up, it broadcasts a DHCP Discover message to request an IP address. If the DHCP server receives the request and is configured to respond with Option 43, it will include the IP address of the WLC in the DHCP Offer message.
Option 43 is a vendor-specific option, which means that it uses a special format that is specific to Cisco devices. The format of Option 43 consists of a type byte, a length byte, and one or more sub-option fields. Each sub-option field contains a specific piece of information, such as the IP address of the WLC.
Option 60 is the Vendor Class Identifier (VCI) option, which allows the client to identify the type of device it is. Option 67 is the Bootfile Name option, which specifies the name of the file to be downloaded from the TFTP server. Option 150 is the TFTP server address option, which provides the IP address of the TFTP server from which the client can download its configuration file.
In conclusion, DHCP Option 43 is the option that helps Lightweight Access Points find the IP address of a Wireless LAN Controller. Option 60, Option 67, and Option 150 are not directly related to this function.