IP Source Guard (IPSG)is aLayer 3 security featureused to protect againstIP address spoofingby filtering packets based onbound IP-MAC mappings.
Correct Statements:✔IPSG is a Layer 3 filtering mechanismthat checks if the source IP address of a packet matches thelearned or configuredbindings (Option B).✔IPSG prevents unauthorized IP address changesby enforcing binding rules (Option C).✔IPSG defends against IP spoofing attacksby dropping packets fromunauthorized sources(Option D).
Incorrect Statement:❌Option A is incorrectbecause IPSGdoes not send alarms to an NMSwhen an invalid packet is detected. Instead, itdropsthe packet.
Thus, the correct answer isA.
????Reference:Huawei HCIE Datacom Security Guide - IP Source Guard (IPSG)
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