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It can be enabled for single files or entire folders (and subfolders). EFS also includes features to decrypt files in case an original user s encryption keys are lost. See also encryption. encryption The process of scrambling data in a complex and reversible way to provide security to data residing on a computer or traversing a network. A key is required to decrypt and read the data. See also Encrypting File System. Ethernet A network protocol that specifies the interface design (how the cable jacks and adapter receptacles should be built) and signaling process for LAN communications. Ethernet uses a signaling scheme known as CSMA/CD and operates at a capacity of 10 Mbps or greater. See also Carrier Sense Multiple Access with Collision Detection. Extensible Authentication Protocol (EAP) An authentication method that provides security extensions so that administrators can employ alternative security technologies, such as smart cards or biometric devices, for users logging on to the network.

allow DHCP traffic and the return of initiated outbound sessions through stateful packet filtering. Another feature that is only manageable through Netsh is persistent policy. Persistent policy is always applied before and remains in effect regardless of whether IPSec policies are applied locally or by the Active Directory directory service. The other area that was greatly changed to improve security is the default exemption handling. In Windows 2000, five types of network traffic were exempted from IPSec. Table 19-8 contains the default exemptions in Windows 2000 and Windows Server 2003. By default Windows Server 2003 IPSec default exemptions are set to 3. You can set default exemptions by setting the value for the registry key HKLM\SYSTEM\CurrentControlSet\ Services\IPSec\NoDefautExempt.

For interoperability, Windows Server 2003 improves integration between IPSec and Network Load Balancing (NLB) and allows IPSec to be used across NAT and PAT routers through NAT traversal.

FAT32 file system The most recent version of Microsoft s FAT file system. FAT32 can be used as an optional file system for Windows XP and is also accessible by many other operating systems including Windows 95 OSR2, Windows 98, and Windows Millennium Edition (Me). FAT32 lacks many of the advanced features offered by NTFS. See also file allocation table; NTFS file system. Fiber Distributed Data Interface (FDDI) A fiber-optic LAN/WAN networking technology that is capable of 100 Mbps transfer. FDDI works much like a Token Ring network, but two rings are used, providing redundancy should the primary ring fail.

Create a TCP/IP hardening policy. Ensure that the TCP/IP stack on your computers that run Windows Server 2003, Windows 2000, and Windows XP is appropriately secure in regard to the threats to it. This is especially true of any computer directly connected to the Internet or in screened subnets.

private void Browser_Load(object sender, EventArgs e) { this.tsbBack.Enabled = false; this.tsbForward.Enabled = false; this.lblApplicationStatus.Text = Ready ; } private void ModifyNavigationButtons() { // Add the code to enable or disable whenever there are URLs // in the browsing session s history if (myBrowser.CanGoBack) tsbBack.Enabled = true; else tsbBack.Enabled = false; if (myBrowser.CanGoForward) tsbForward.Enabled = true; else tsbForward.Enabled = false; } private void myBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { // The about box is retrieving this information in a nice clean method // so let s reuse it // If you don t have an about box you can just create this method using // the code from the about box. We don t need to validate if the title // is empty; the method is doing it. // If it s empty it will use the .exe name this.Text = myAboutBox.AssemblyTitle + - + e.Url.Host.ToString(); ModifyNavigationButtons(); this.lblApplicationStatus.Text = Ready ; }

Windows Firewall provides an excellent degree of protection for mobile clients and home computers. Be certain to provide training to users on how to enable and disable Windows Firewall.

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Encrypting File System (EFS) A feature of NTFS that encrypts files so that hackers and even system administrators cannot view them.

Use IPSec to secure communication on corporate networks. By using IPSec you can increase the security for data transmission on your network as well as control network access to high-value servers. Use IPSec hardware accelerators when possible. By using IPSec hardware accelerators on computers that will have many IPSec sessions at a time, such as servers, you can prevent the computers CPU performance from being overly taxed.