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【单选题】
在我国，以《计算机信息系统安全保护等级划分准则》(GB17859-1999)为指导，将信息和信息系统的安全保护分为5个等级，如果涉及国家安全、社会秩序、经济建设和公共利益的信息和信息系统，其受到破坏后，会对国家安全、社会秩序、经济建设和公共利益造成较大损害，这属于______。A.
第二级指导保护级
B.
第三级监督保护级
C.
第四级强制保护级
D.
第五级专控保护级
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【多选题】A new switch is being installed in the Ezonexam network and you have been assigned the task of connecting it to an existing switch. In doing this, you want to set up the VLAN Trunking Protocol so that...
A.
You must set each end of the trunk line to IEEE 802.1e encapsulation.
B.
You must set the same VTP management domain name on both switches.
C.
You must set all ports on the two switches as access ports.
D.
You must configure one of the switches as a VTP server.
E.
You must use a rollover cable to connect the two switches.
【单选题】According to the passage, young people love coffee because of ______.
A.
new and foreign taste of coffee
B.
enjoyment and troubles of their work and love
C.
their desire for homes of their own
D.
their desire for stimulating their nerves
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