Free CheckPoint 156-215.81 (R81.20) Actual Exam Questions - Question 2 Discussion

This one’s definitely UDP (A). The other options like CCP or TDP don’t really fit here since RADIUS uses a connectionless protocol for speed and simplicity. HTTP is way too heavy for what RADIUS does. So, UDP makes the most sense given RADIUS’s need to quickly authenticate and authorize without the overhead of TCP.

D imo, UDP makes the most sense here because RADIUS needs to send small, quick packets without the overhead of connection setup. CCP and TDP aren't even protocols used for this kind of network communication, so they're easy to rule out. HTTP is mostly for web traffic, so definitely not relevant for RADIUS in communicating with gateways.

A. RADIUS uses UDP because it needs fast, connectionless communication. TCP (or TDP, which isn’t a real protocol) would add overhead and delay, which is not ideal for authentication and accounting tasks. HTTP is out of the question since it’s an application layer protocol, not suitable for this kind of network service.

Option A, since UDP suits the lightweight nature of RADIUS communication.

That’s false, it can’t be D since HTTP isn’t used for RADIUS communication.

A, because RADIUS typically relies on UDP, not TCP or HTTP.

It's definitely A. UDP since RADIUS always uses UDP for communication.