which port does a Cisco IOS IP SLA source use to send a control message to an IP SLA responder? To initiate testing, which port does a Cisco IOS IP SLA source use to send a control message to an IP SLA responder?Select the best response. To initiate testing, which port does a Cisco IOS IP SLA source use to send a control message to an IP SLA responder?Select the best response. A.UDP port 2020 B.UDP port 1967 C.TCP port 2020 D.ICMP port 1967 Show Hint ← Previous question Next question →