A customer wants to understand the benefits of a proposed network design that utilizes SNMPv3. Which two network threats is SNMPv3 effective against? (Choose two.)

SNMPv3's User-based Security Model (RFC 3414) uses HMAC-MD5 or HMAC-SHA to authenticate every message, allowing the receiver to detect any unauthorized alteration of SNMP data in transit and reject tampered messages.

SNMPv3 authentication verifies the sender's identity against a configured shared secret, preventing an attacker from impersonating a legitimate SNMP manager or agent - directly mitigating masquerade attacks.

RFC 3414 explicitly states that protection against denial-of-service attacks is outside the scope of SNMPv3's security model, as volumetric flood attacks operate below the layer where SNMP authentication applies.

RFC 3414 explicitly acknowledges that traffic analysis - inferring network behavior from message timing and frequency patterns - is not addressed by SNMPv3, even when encryption is enabled.