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Các loại khung quy định cụ thể như thế nào dữ liệu được đóng gói để truyền qua mạng. Nếu các máy tính đang sử dụng NWLink sử dụng các loại khung khác nhau, họ không thể giao tiếp với nhau. Thiết lập mặc định cho các loại khung hình, tự nhận, mà sẽ cố gắng để tự động chọn một loại khung tương thích cho mạng của bạn. | 492 Chapter 12 Dial-Up Networking and Internet Connectivity The Include Windows Logon Domain option works in conjunction with the Prompt for Name and Password Certificate Etc. option. This option specifies that Windows logondomain information should be requested prior to initiating a connection. The Prompt for Phone Number option allows the telephone number to be viewed selected or modified prior to initiating a connection. FIGURE 12.19 The Options tab of the Connection Properties dialog box The options for redialing let you specify the number of redial attempts if the connection is not established and the time between the redial attempts. You can also designate how long a connection will remain idle before the computer hangs up. If you want the computer to redial the connection number should the connection be dropped check the Redial if Line Is Dropped check box. The X.25 button at the bottom of this dialog box can be used to configure an X.25 connection. This requires you to know which X.25 provider you are using and the X.121 address of the remote server you wish to connect to. Configuring RAS Connection Security Security settings are among the most important options to be configured for dial-up connections. You can set typical or advanced custom settings security options in the Security tab of the Connection Properties dialog box as shown in Figure 12.20. This tab also has options for interactive logon and scripting. Copyright 2003 SYBEXInc. 1151 Marina Village Parkway Alameda CA 94501. www.sybex.com COPYING PROHIBITED Creating a Connection to a Remote Access Server 493 FIGURE 12.20 The Security tab of the Connection Properties dialog box Connections that are more secure require more overhead and are usually slower. Less-secure connections require less overhead and are typically faster. Typical Security Settings You generally will configure typical security settings unless you need to use specific security protocols. When you select the Typical radio button you
