单项选择题
A.Switching loop is occurring on the switch.
B.Wrong subnet mask on the switch.
C.Incorrect SNMP settings on the switch.
D.Port is misconfigured on the switch.
单项选择题 WhichofthefollowingprotocolswouldamultilayerswitchusetolearntheIPaddressofadirectlyconnecteddevice？（）
单项选择题 Whichofthefollowingisthedefaultportfortelnet？（）
单项选择题 Given the following routing table entries， which of the following will the next-hop address be for a packet destined for the address 192.168.1.203？（）