Which three statements about the features of SNMPv2 and SNMPv3 are true?（）

单项选择题What command instructs the device to timestamp Syslog debug messages in milliseconds?（）

A.service timestamps log datetime localtime
B.service timestamps debug datetime msec
C.service timestamps debug datetime localtime
D.service timestamps log datetime msec

单项选择题What is the default Syslog facility level?（）

A.local4
B.local5
C.local6
D.local7

多项选择题A network administrator enters the following command on a router: logging trap 3. What are three message types that will be sent to the Syslog server? （）

A.informational
B.emergency
C.warning
D.critical 
E.debug
F.error

多项选择题Which three statements about Syslog utilization are true?（）

A.Utilizing Syslog improves network performance.
B.The Syslog server automatically notifies the network administrator of network problems.
C.A Syslog server provides the storage space necessary to store log files without using router disk space.
D.There are more Syslog messages available within Cisco IOS than there are comparable SNMP trap messages.
E.Enabling Syslog on a router automatically enables NTP for accurate time stamping。
F.A Syslog server helps in aggregation of logs and alerts.

多项选择题Which three statements about HSRP operation are true?（）

A.The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
B.The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
C.HSRP supports only clear-text authentication.
D.The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN.
E.The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN.
F.HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.