单项选择题

In a TCP/IP network， which of the following protocols is involved when a user issues a ping command？（）

A.TCP
B.UDP
C.ICMP
D.SMTP

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单项选择题AllofthefollowingcommandswillsetthehostnameintheODMdatabaseEXCEPT：（）。

A.chdev
B.odmadd
C.hostname
D.smitty hostname

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A.LES
B.BUS
C.LECS
D.ARP server