Supplicant - Authenticator - Server
The client desiring access to a network is called the "supplicant." The device that provides the network port to the client is the "authenticator." In a wireless network, the authenticator is in the access point (AP). In a dial-up network, the authenticator is in the network access server (NAS). The device that contains usernames and passwords and authorizes the user is the "authentication server." In small networks, the authentication server can be located in the same unit as the authenticator.

The term supplicant is used in the IEEE 802.1X standard, where the supplicant is an entity at one end of a point-to-point LAN segment that seeks to be authenticated by an authenticator attached to the other end of that link.

I suggest translating it by description mentioning the original name or transliterating it.

I am just trying to help suggest a translation and not sure how much it might be acceptable and accessible to the target readership.

يستحسن الإبقاء على الاسم دون ترجمه لأنه عن برنامج يعمل في خلفية نظام التشغيل للتحكم في الاتصال اللاسلكي
وضع المتوسل
Supplicant
A wireless client that is requesting access to a network.
"Supplicant" is the official word in the standard, and all it means is WPA client software. It runs in the background and controls your wireless connections. Supplicant is an interesting word choice, with all of its overtones of humility and abasement. We would rather have our computers humbly abase themselves, instead of us having to suck up to log into our own WLAN.
A wireless client supplicant is the software that runs on an operating system instructing the wireless client how to use WPA.