关于网络安全管理的描述中,错误的是()
C
解析:网络安全管理采用信息安全措施保护网络中的系统、数据以及业务。其作用主要有:采用多层防卫手段; 提供迅速检测非法使用和非法入侵初始点的手段; 提供恢复被破坏的数据和系统的手段;提供查获入侵者的手段。根据解析,选项 C 符合题意,故选择 C 选项。
以下关于IPSec协议的叙述中,正确的是()
一个密码系统如果用E表示加密运算,D表小解密运算,M表示明文,C表示密文,则下面描述必然成立的是()。
Wecannot_____presententertainanyfreshordersforYoungerBrandMen'sShirts.()
“Woman”becomes“Frau”inGerman,“femme”inFrenchand“fùnǔ”inChinese.Thisexampleshowsthatindifferentlanguagesthesameconceptcanberepresentedbydifferent______.
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
Thetwinshadbeenawayforsuchalongtimethatmanypeopleinthevillagethoughtthey________.
ModernEnglishwordsman,woman,child,eat,fight,etc,originatefrom______.
Nowmanymajoremployersarebeginningtodemand_______thecompletionofschool
OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.
WeenclosedourPurchaseConfirmationNo.4848__in__duplicate^)一式两份intriplicate(一式三份)
They________extensiveandpossiblydangerousactualflighttraining.
Shesat________thetableintherestaurant.