单项选择题 The following output occurs on Router R1. IP SLA operation 1 uses an ICMP echo operation type, with default frequency of 60 seconds. The operation pings from address 1.1.1.1 to address 2.2.2.2. Which of the following answers is true reg arding IP SLA and object tracking on R1?（） R1# show track Track 2 IP SLA 1 state State is Up 3 changes, last change 00:00:03 Delay up 45 secs, down 55 secs Latest operation return code: OK Latest RTT (millisecs) 6 Tracked by: STATIC - IP - ROUTING 0

单项选择题 The following configuration commands exist only in an implementation plan document. An engineer does a copy/paste of these commands into configuration mode on Router R1. Which of the following answers is m ost accurate regarding the results?（） ip sla 1 icmp - echo 1.1.1.1 source -ip 2.2.2.2 ip sla schedule 1 start - time now life forever

多项选择题 Which of the following are examples of traffic that can be created as part of an IP Service -Level Agreement operation?（）