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？（）

多项选择题 WhichofthefollowingareformsofgigabitEthernetthatrequiretheuseoffiberopticcables？（）

单项选择题 WhichofthefollowingnetworkdevicesoperatesonLayer1oftheOSImodel？（）