单项选择题
Which of the following is the default port for telnet？（）
A.20
B.21
C.22
D.23
点击查看答案
相关考题
-
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？（）
A.77.0.5.5
B.40.40.0.254
C.66.40.90.121
D.72.40.91.1 -
多项选择题
WhichofthefollowingareformsofgigabitEthernetthatrequiretheuseoffiberopticcables？（）
A.1000Base-CX
B.1000Base-TX
C.1000Base-SX
D.10Base-T
E.1000Base-T
F.1000Base-LX -
单项选择题
WhichofthefollowingnetworkdevicesoperatesonLayer1oftheOSImodel？（）
A.Hub
B.Switch
C.Router
D.Bridge
