A network engineer receives the following when connecting to a switch to configure a port:
telnet 10.1.200.1
Connecting to 10.1.200.1..Could not open connection to the host, on port 23:
Connect failed.
Which of the following is the MOST likely cause for the failure?


A. The network engineer is using the wrong protocol.
B. The network engineer does not have permission to configure the device.
C. SNMP has been secured with an ACL.
D. The switchport the engineer is trying to configure is down.