Absolute Free H12-725_V4.0 Exam Practice for Comprehensive Preparation 

HWTACACS is a centralized information exchange protocol based on the client/server structure. It uses UDP for transmission and performs authentication, authorization, and accounting for users accessing the Internet through Point-to-Point Protocol (PPP) or Virtual Private Dial-up Network (VPDN) and administrative users logging in to devices. 

Before configuring DDoS attack defense, you must configure different thresholds for defense against different types of attacks. Each threshold can be considered an upper limit for normal network traffic. When the rate of traffic exceeds the pre-configured threshold, the firewall considers it to be attack traffic and takes a corresponding action to defend against it.