What is MSFT 5.0? Why is the device type shown in the light cat MSFT 5.0?
Let's look at a picture of a light cat.
![](http://aliyunzixunbucket.oss-cn-beijing.aliyuncs.com/csdn/06c5b9d4-c3d0-481d-b3ee-192438f64f9e?x-oss-process=image/resize,p_100/auto-orient,1/quality,q_90/format,jpg/watermark,image_eXVuY2VzaGk=,t_100,g_se,x_0,y_0)
Then look at the process of assigning IP addresses to DHCP, Discover-offer-request-ack, and finally adding an ARP acknowledgment
![](http://aliyunzixunbucket.oss-cn-beijing.aliyuncs.com/csdn/479da587-f430-428f-84b0-4a13660a6bcb?x-oss-process=image/resize,p_100/auto-orient,1/quality,q_90/format,jpg/watermark,image_eXVuY2VzaGk=,t_100,g_se,x_0,y_0)
is actually the option field in the DHCP request (DHCP requests message) options: Vendor class identifier The vendor type identifier field, where the light cat shows its value. Similar routers can also display option: (a) Host name, option: (bayi) client Fully qualified domain name clients full domain name.
For the option 60 field, the Windows operating system client has a value of MSFT 5.0, and the Android device dhcpcd-5.5.6
The following is the corresponding relationship
MSFT 5.0 <--> Windows
DHCPCD 4.0.1 <--> Android 2.2
DHCPCD 4.0.15 <--> Android 3.0
dhcpcd-5.2.10 <--> Android 4.0
dhcpcd-5.5.6 <--> Android 4.2
UDHCP 1.19.4 <--> Pole routing or other routers