To calculate the DHCP Option 43 hex value for a Wireless LAN Controller (WLC) with the IP address 192.168.123.100, we need to follow the format specified for Option 43.
The format generally is:
- The first byte is the type of option, which is
f1
for vendor-specific options. - The second byte indicates the length of the data that follows, which typically would be
04
for a 4-byte IP address. - The next bytes represent the IP address in hexadecimal format.
The IP address 192.168.123.100 needs to be converted to hex:
- 192 in hex is C0
- 168 in hex is A8
- 123 in hex is 7B
- 100 in hex is 64
So the IP address 192.168.123.100 in hex would be C0A87B64.
Putting it all together:
- Type: F1
- Length: 04
- IP: C0A87B64
The final Option 43 value becomes F104C0A87B64.
Based on the provided options, the correct answer is:
F104C0A87B64.