[多选] Cisco NX-OS Software supports SNMPv1， SNMPv2c， and SNMPv3. Both SNMPv1 and SNMPv2c use a community-based form of security. SNMPv3 provides secure access to devices by a combination of authenticating and encrypting frames over the network. Which security features are provided in Cisco NX-OS SNMPv3？（）

A . encryption—scrambles the packet contents to prevent them from being seen by unauthorized sources
B . password—a password （community string） sent in clear text between a manager and agent for added protection
C . authentication—determines that the message is from a valid source
D . message integrity—ensures that a packet has not been tampered with while it was in transit
E . user—to determine if user authentication is used instead of community string

Which two IP multicast addresses belong to the group represented by the MAC address of 0x01-00-5E-15-6A-2C？（） 224.21.106.44。 224.25.106.44。 233.149.106.44。 236.25.106.44。 239.153.106.44。欧洲历史上第一位工业设计师是（）奇朋代尔。魏德·伍德。保尔顿。德莱赛。符合一年一次探亲条件的铁路职工，如经过领导批准可将探亲假一年分两次使用并填写两次探亲乘车证。（）酸牛乳生产中最常用的菌种是保加利亚乳杆菌和（）乳酪链球菌。丁二酮乳链球菌。嗜热链球菌。符合四年一次探亲条件的职工，在自己不享受探亲假的条件下其供养的配偶、子女每年可单独使用一次乘车证。（） Cisco NX-OS Software supports SNMPv1， SNMPv2c， and SNMPv3. Both SNMPv1 and SNMPv2c use a community-based form of security. SNMPv3 provides secure access to devices by a combination of authenticating and encrypting frames over the network. Which security features are provided in Cisco NX-OS SNMPv3？（）

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