单项选择题 You are a network administrator for your company. The network consists of five Windows Server 2003 computers and 50 Windows XP Professional computers on a single subnet.   On Sunday， another administrator installs a new firewall between the LAN and the company’s T1 Internet connection. The network is configured as shown in the exhibit. （Click the Exhibit button.）   Local host names are resolved on the network by using a WINS server. All client computers are configured to use ISP1 for DNS name resolution.On Monday morning， users report that they are no longer able to access secure and nonsecure Internet Web sites.From a Windows XP Professional computer， you are able to succesfully perform the following tasks： Ping the IP addresses of Web servers on the Internet.Use Internet Explorer to open both secure and nonsecure Web sites by using an IP address in place of the URL.  You run the nslookup command and attempt to resolve an Internet fully qualified domain name （FQDN）. You receive the following error message：  *** [131.107.100.200] can’t find www.microsoft.com： No response from server >   You need to use the minimum amount of administrative effort to provide users with the ability to browse Web sites on the Internet.  What should you do？（）

单项选择题 You are the network administrator for your company.You work in the company’s branch office in Chicago. The network in your office consists of 40 Windows XP Professional desktop computers and one Windows Server 2003 computer named Server1. Server1 connects to the Internet through a 512-Kbps leased line. The main office of the company is in Seattle.Users of the desktop computers in the Chicago office are developers who are developing a new software product. You want these users to place daily builds of the product in a shared folder on Server1. You want developers in the Seattle office to be able to download the daily builds from Server1 by using FTP.You install IIS on Server1 and configure the FTP site so that it is available to the developers in the Seattle office. However， when you monitor inbound Internet connection attempts to Server1， you notice many attempted HTTP connections.You want to secure Server1 so that it is not susceptible to malicious Internet users. Server1 must also connect to the Internet to use Windows Update and to download virus definition updates. You do not want to purchase additional hardware or software.   What should you do on Server1？（）

单项选择题 You are the network administrator for your company. The network consists of a single Active Directory domain. The domain contains 25 Windows Server 2003 computers and 6，000 Windows XP Professional computers.The written company security policy states that network traffic to Web servers must be audited on a regular basis. A server named Server1 is configured as a Web server on the company’s intranet. You install Network Monitor Tools from a Windows Server 2003 product CD-ROM on Server1.You run Network Monitor on Server1 for three hours. When you stop the network capture， you see that Network Monitor captured over 40，000 frames. As you look at the captured frames， you notice that an extremely large number of TCP connection requests have all come from the 131.107.0.1 IP address.In Network Monitor， you need to view only the frames for network traffic that are captured between Server1 and the 131.107.0.1 IP address.  What should you do？（）