সরাসরি ভিডিও কলে পরামর্শ নিন
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যে সাইবার আক্রমণ সংঘটিত হলে গ্রাহকের বৈধ অনুরোধসমূহ কোন একটি Web server সম্পূর্ণ করতে ব্যর্থ হয় সেটি কী নামে পরিচিত?

সঠিক উত্তর: Denial of Service
সেই সাইবার আক্রমণকে প্রবল করে যায় "ডেনাই অফ সার্ভিস" বা "DoS (Denial of Service)"। এটি হল একটি হামলা ধরণ যেখানে হ্যাকাররা কোনো একটি ওয়েব সাইটে বহুমুখী ট্রাফিক শুরু করে বা কম্পিউটারে বেশি মাত্রার ডেটা প্রেরণ করে ওয়েব সাইটটির সংযোগ ব্যবহারকারীদের ব্যবহার অস্বাভাবিক করে। এর ফলে ওয়েব সার্ভারটি ভাল প্রদর্শন না করতে পারে এবং বিভিন্ন ধরনের ব্যবহারকারীদের জন্য সেবার অধিক সময় নেওয়া লাগতে পারে।ডেনাই অফ সার্ভিস হামলার উদ্দেশ্য হল নির্দিষ্ট ওয়েব সাইটের ব্যবহারকারীদের উপলব্ধি বা সেবা থেকে প্রতিবন্ধক হওয়া। এটি সাধারণত নিয়মিত ওয়েব সাইট ব্যবহারকারীদের প্রবল আকারের অনুরোধের সাথে ঘটে।

You are the administrator of the Windows 2000 Server network shown in the exhibit. Users in the Research group and the Executive group have permission to access the Internet through a Windows 2000 Server computer running Microsoft Proxy Server. These users must enter their proxy server user names and passwords to connect to the proxy server, to the Internet, and to your local intranet server. The users who do not access the Internet do not have user accounts on the proxy server and, therefore, cannot connect to the intranet server. You want all users to be able to connect to the intranet server without entering a separate user name and password. What should you do?

নিচের কোন সাইবার আক্রমণ সংঘটিত হলে গ্রাহক নিজ Computer system ব্যবহার করতে পারেন না এবং Computer System কে ব্যবহার উপযোগী করতে অর্থ দাবি করা হয়?

You are the administrator of a SQL Server 2000 computer. The server contains a database named FinanceData that is used by a client/server application. Each employee has a SQL Server login that the application uses to access the server.Your company hires a new employee named Andrew. You create a SQL Server login named Andrew. You also create a database user named Andrew in the database and grant the database user full permissions in the database.Whenever Andrew runs the client/server application, he receives the following error message: "Invalid object name." Andrew also reports that he cannot access the database by using the application.You need to ensure that Andrew can use the application. Which Transact-SQL statement should you execute?

You install a Windows 2000 Server computer on your network. You place several shared folders on a 12-GB primary partition formatted by FAT32. During nine months of continuous operation, the number of users who access the server and their access frequency remains constant. The average size of the files on the server remains approximately constant. After the server runs continuous for nine months, users report that the server does not retrieve files from the shared folders as fast as when you first installed the server. What should you do to resolve the problem?

সম্পূর্ণ খালি একটি চৌবাচ্চ একটি পাইপ দিয়ে ৫ ঘন্টায় সম্পূর্ণ ভর্তি করা যায়। দ্বিতীয় একটি পাইপ দিয়ে চৌবাচ্চাটি ভর্তি করতে ৩ ঘণ্টা লাগে। দুটি পাইপ একসাথে ব্যবহার করে চৌবাচ্চাটি ২/৩ অংশ ভর্তি করতে কত সময় লাগবে?

You are the administrator of a Windows 2000 Server computer named Intra. Intra is a member of an Active Directory domain and hosts an Intranet Web-Ske for your company. Company policy requires that only authenticated users have access to the intranet site. All company users have a user account in the Active Directory domain. You configure directory security for the Web Site to use integrated security. However, you discover that users can access the Web Site without authentication. You need to ensure that only authenticated users can access the web site. What should you do?

You are a Web developer for XYZ. You create an ASP.NET application that accesses sales and marketing data. The data is stored in a Microsoft SQL Server 2000 database on a server named XYZ01.
The company purchases a factory automation software application. The application is installed on XYZ01, where it creates a second instance of SQL Server 2000 named Factory and a database named FactoryDB. You connect to FactoryDB by using Windows Integrated authentication.
You want to add a page to your ASP.NET application to display inventory data from FactoryDB. You use a SqlConnection object to connect to the database. You need to create a connection string to FactoryDB in the instance of SQL Server named Factory on XYZ01. Which string should you use?

You are the administrator of a Microsoft Windows NT Server 4.0 computer. The server is the PDC in your domain and also runs SQL Server 2000. The server has four processors and 1 GB of RAM.Your network consists of 500 client computers that are running Microsoft Windows Millennium Edition. Users report that when they log on in the morning their computers respond slowly and occasionally return error messages.You use System Monitor to monitor processor performance and RAM utilization. You discover that the % Total Time and % User Time counters average 90 percent and the % Privileged Time counter averages 20 percent. The Available Mbytes counter averages 800 MB. You need to improve server performance for user logons. What should you do?

You are the administrator of a SQL Server 2000 computer. Your company uses the server to store service contract information for its customers. You are also the administrator of an Oracle relational database management system (RDBMS) server. This server is used to store your company's financial information. The financial information is updated frequently throughout the day.You need to create a series of reports that combine the service contract information and the financial information. These reports will be updated several times a day.You want to create these reports on the SQL Server computer by using the minimum amount of disk space. What should you do?

You are the administrator of a Windows 2000 Server computer. The server contains one network adapter and is a file and print server for critical company resources. You install a second network adpater in the server and connect it to the same network subnet as the first adapter. You want to ensure that the first adapter is used for all network traffic and the second adapter is used only if the first adapter fails or is disconnected from the network. You also want to ensure that the server always has network connectivity even if one network adapter fails. What should you do?