单项选择题
You are unable to telnet to a router at address 203.125.12.1 from a workstation with the IP address 203.125.12.23. You suspect that there is a problem with your protocol stack. Which of the following actions is most likely to confirm your diagnosis?（）
A. ping 127.0.0.0
B. ping 203.125.12.1
C. telnet 127.0.0.1
D. ping 127.0.0.1
E. tracert 203.125.12.1
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相关考题
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单项选择题
Why would an administrator change the value of the spanning-tree priority of a switch?（）
A. in order to optimize the path that frames take from source to destination
B. to increase the priority so a designated port will become a root port
C. to increase the BID, so the switch is more likely to become root bridge
D. in order to allow VLANs to be sent from one switch to another across a single link
E. to force a given switch to become an STP server -
多项选择题
Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?（）
A. designated ports.
B. duplex operating mode.
C. fast mode ports.
D. root bridge.
E. root ports.
F. BDPU priority. -
单项选择题
What is the subnetwork number of a host with an IP address of 172.16.210.0/22?（）
A. 172.16.42.0
B. 172.16.107.0
C. 172.16.208.0
D. 172.16.252.0
E. 172.16.254.0
