What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.)（） ["Allow unrestricted access to the console or VTY ports.","Use a firewall to restrict access from the outside to the network devices.","Always use Telnet to access the device command line because its data is automatically encrypted.","Use SSH or another encrypted and authenticated transport to access device configurations.","Prevent the loss of passwords by disabling password encryption.&e"]
（）促进精神文明建设的发展，是一个社会精神文明发展程度的突出标志，是（）的重要组成部分。 ["职业道德","社会道德体系","社会进步","社会公德"]
《铁路客运列车运送公文办法》公文数量较多时，须分别包装，每包重量不得超过（）公斤。 ["5","10","15","20"]
《空调列车服务质量规范》临时停车列车启动（）检查瞭望。 ["前两门","后两门","前四门","后四门"]
道路客货运驾驶员连续驾车不得超过（）。 ["3h","4h","5h","6h"]
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