[单选]

You are working as a network technician， study the exhibit carefully. Your boss has informed youthat there have been problems with the WAN that is using EIGRP routing protocol. You arerequired to troubleshoot these problems.
Before going to the questions of this sim， we should have a quick review about GRE tunneling：GRE Quick Summary.
The picture below shows how to configure a GRE Tunnel between two routers， notice that the"tunnel destination" must be the IP address of the interface， not of the opposite tunnel.

Notice： The tunnel source on one router must be specified as the tunnel destination on the otherrouter.
Below are the questions of this lab-sim.
What is the reason for the ping between the HQ router and the 192.168.1.193 interface on theBranch2 router failing？（）

You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named DB1 in the instance. You put forward a database maintenance plan. The maintenance plan rebuilds indexes, checks database integrity, writes a report to a text file. Now the company requires that when the maintenance plan executes abnormally, the operators can be notified by an e-mail message. You've been assigned this task. So you have to make modifications on the SQL Server instance. What should you do?（） For the SQL Server Agent, you should enable a fail-safe operator 。 You should modify the database maintenance plan, making it send an e-mail to the appropriate operators 。 You should modify the database maintenance plan, making it include a Notify Operator task that e-mails the appropriate operators. 。 You should modify the SQL Server Agent job. The job executes the database maintenance plan to notify the appropriate operators.。 分析北京故宫中轴线前三殿以南的空间处理手法？ You work as an ASP.NET Web Application Developer for SomeCompany.  The company uses Visual Studio .NET 2010 as its application development platform.You create an ASP.NET Web site using .NET Framework 4.0. Only registered users of the company will be able to use the application. The application holds a page named UserAccount.aspx that enables new users to register them to the registered users„ list of the company. The UserAccount page hold numerous TextBox controls that accept users personal details， such as user name， password， home address， zipcode， phone number， etc.  One of the TextBox controls on the page is named ZipCode in which a user enters a zip code.  You must ensure that when a user submits the UserAccount page， ZipCode must contain five numeric digits.  What will you do to accomplish this？（） Use RangeValidator.。 Use RegularExpressionValidator。 Use RequiredValidator。 Use CompareValidator。 Use RequiredFieldValidator。 中国古建筑采用木材作为主要建材之一有何优缺点？ 科技道德的特点包括（） 阶级性。 普遍性。 广泛性。 持久性。

You are working as a network technician， study the exhibit carefully. Your boss has informed youthat there have been problems with the WAN that is using EIGRP routing protocol. You arerequired to troubleshoot these problems.
Before going to the questions of this sim， we should have a quick review about GRE tunneling：GRE Quick Summary.
The picture below shows how to configure a GRE Tunnel between two routers， notice that the"tunnel destination" must be the IP address of the interface， not of the opposite tunnel.

Notice： The tunnel source on one router must be specified as the tunnel destination on the otherrouter.
Below are the questions of this lab-sim.
What is the reason for the ping between the HQ router and the 192.168.1.193 interface on theBranch2 router failing？（）