网络攻击和防御分别包括哪些内容?
更新时间:2024-11-19 01:33:16攻击技术主要包括以下几个方面
(1)网络监听：自己不主动去攻击别人，而是在计算机上设置一个程序去监听目标计算机与其他计算机通信的数据。
(2)网络扫描：利用程序去扫描目标计算机开放的端口等，目的是发现漏洞，为入侵该计算机做准备。
(3)网络入侵：当探测发现对方存在漏洞后，入侵到目标计算机获取信息。
(4)网络后门：成功入侵目标计算机后，为了实现对“战利品”的长期控制，在目标计算机中种植木马等后门。
(5)网络隐身：入侵完毕退出目标计算机后，将自己入侵的痕迹清除，从而防止被对方管理员发现。
防御技术主要包括以下几个方面。
(1)安全操作系统和操作系统的安全配置：操作系统是网络安全的关键。
(2)加密技术：为了防止被监听和数据被盗取，将所有的数据进行加密。
(3)防火墙技术：利用防火墙，对传输的数据进行限制，从而防止被入侵。
(4)入侵检测：如果网络防线最终被攻破，需要及时发出被入侵的警报。
(5)网络安全协议：保证传输的数据不被截获和监听。
暂无解析
Underno_____willIgothereagain.
PartIVTranslation
Bymeasuringandchartingtheresultsofmanyexperiments,theyaretryingtofindoutwhatmakesdifferentpeopleperceivetotallydifferentthingsaboutthesamescene.(PassageOne)
关于问诊中现病史的询问不包括
Questions1to5arebasedonthefollowingpassage:
Someyearsagothecaptainofashipwasveryinterestedinmedicine.Healwaystookmedicinebookstoseaandlikedtotalkaboutdifferentdiseases.
Onedayalazysailoronhisshippretendedtobeill.Helayonhisbunk(铺)andgroanedasifhewereverysick.Thecaptaincametoseehimandwasverypleasedtohaveapatienttolookafter.Hetoldthemantorestforafewdaysandmadetheothersailorsdohiswork.Threedayslateranothersailorpretendedthathehadsomethingwrongwithhischest.Oncemorethecaptainlookedinhismedicalbooksandtold“sick”mantohavearest.
Theothersailorswereveryangrybecausetheyhadmoreworktodo.Thepatientshadthebestfoodandlaughedattheirfriendswhenthecaptainwasnotlooking.Atlastthemate(船长副手)decidedtocurethe“sick”men.Hemixedupsomesoap,soot(烟灰),glue(胶水)andotherunpleasantthings.Thenheobtainedpermissionfromthecaptaintogivehismedicinetothe“sick”men.Whentheytastedthemedicine,theyreallydidfeelill.Itwassohorriblethatoneofthepatientsjumpedoutofhibunk,ranupondeskandclimbedthehighestmastontheship.Hedidnotwantanymoremedicine.
Thematetoldbothofthementhattheymusttakethemedicineeveryhalfanhour,nightandday.Thissooncuredthem.Theybothsaidtheyfeltbetterandwantedtostartwordagain.Thecaptainrealizedthatthementriedtodeceivehimsohemadethemworkveryhardfortherestofthevoyage.
1.Thefirstsailorpretendedtobeillbecausehewantedto.
A.testthecaptain’sknowledgeofmedicine
B.befreefromwork
C.havethebestfoodontheship
D.playajokeonhisfriends
2.Whenthecaptainknewasailorwasill,he.
A.didn’tcaremuch
B.sentforadoctor
C.lookedafterhimandtoldhimtohavearest
D.gavehimsomemedicine
3.Thepatientsfeltbetterquicklybecause.
A.theyhadbeengivenpropermedicine
B.theylearnedthatthecaptainhadfoundoutthetruth
C.theywerelaughedatbytheirfriends
D.themedicinethemategavewashorrible
4.Whenthecaptainknewhehadbeendeceived,he.
A.toldthemnottodosoagain
B.losthistemper
C.madethemworkharder
D.firedthem
5.Whichofthefollowingbestsummarizesthepassage?
A.AsuddenCure.
B.TwoPatients.
C.CaptainandSailors.
D.ADifficultVoyage.
衡量胎先露下降程度的重要指标是：
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