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Chapter 13, Network Security.|1|Chapter Overview.ABCD.Password Protection.Security Models.Firewalls.Security ProtocolsChapter 13, Lesson 1.Password Protection.|2|1.Using Passwords.AB.C.D.Passwords are the most common method of securing network.resourcesThere are security mechanisms other than passwords1Smart cards.aCredit card-like devices with a magnetic strip.bMust be run through a card reader connected to a computer for a user.to access the network.2Biometric devices.aIdentify users by scanning unique physical characteristics, such as.thumbprints or retina patterns.Passwords can be an effective security mechanism, or they can be.useless, depending on how they are used1The strength of any password protection is based on the password.policies that administrators set2When users create their own passwords, they tend to choose short,.simple ones, or use information that is easy to guess, such as birthdays.or initials, or they use no password at all3Assigning complex passwords to users can be equally ineffective,.because the users might be compelled to write them down and leave.them in obvious places4The object is to find a middle ground between these two extremesMost operating systems include tools that enable administrators to.impose password policies on users1Users can be forced to.aChoose passwords of a specific length.bChange passwords at regular intervals.2These tools provide a middle ground that lets users choose effective.passwords that they can remember easily3Password policies are typically available in network operating systems.that use a directory service to authenticate users and grant them access to.network resourcesaYou can set password policies on Windows 2000 and Microsoft.Windows NT domain controllers and Novell NetWare serversb.|3|2.User Account Password Settings.A.3.B.C.|5|2When you create a new user account in Windows 2000 or Windows NT,.you can use the following check boxes in the New Object – User dialog.box to control the basic password policies for the account:.1User Must Change Password At Next Logon. Allows the administrator.to assign the same password to each new user account created and forces.the user to change that password during the first logon.aThe administrator can password-protect the new accounts without.having to track individual password assignments2User Cannot Change Password. Prevents users from changing the.password assigned to the account during its creation.aIf an administrator elects to assign passwords to users, activating this.option on all accounts ensures that he or she retains control over the.password assignments3Password Never Expires. Overrides other policies that cause passwords.to expire after a specified time.aUsers can still change their passwords at will, but they are not.required to do so4Account Is Disabled. Allows the administrator to temporarily prevent.access to an account, eliminating the need to delete and re-create the.accountSpecifying Password Lengths.A.|4|You cannot set password policies in Microsoft Windows Me,.Microsoft Windows 98, or Microsoft Windows 95.Users tend to choose short passwords, because they are easier to type.and remember, or use no password at all1Short passwords are mathematically easier to guessMost network operating systems let the administrator set a minimum.password length requirement1Longer passwords are harder to penetrate2Windows 2000 supports passwords of up to 104 characters3Windows NT supports passwords of up to 14 characters4For most networks, a minimum password length of five or six characters.is sufficientaHigher security might call for eight characters or moreIn Windows 2000, you set password length restrictions by using the.Group Policy feature1You can apply policies to domains, sites, or organizational units2When you activate the Minimum Password Length policy, you speci
