The physical layer is the lowest level of the OSI model and it is responsible for the actual physical connection between the network devices. It transmits information in the form of bits (0s and 1s). The bits are coded as physical states of the transmission medium. For wired cables, these are electrical signals, for optical
The Open Systems Interconnection (OSI) model is a conceptual model created by the International Organization for Standardization. It provides interoperability between different communication systems using standard communication protocols. Or in simpler words, it is a logical model/representation of how the network systems are supposed to send data and communicate with each other. The model splits
XML files are a powerful tool to contain any structured data required for a .NET application or ASP .NET website to run. These files are based on the main principles of HTML and when you create an XML file, you should follow these few rules: The XML file must start with a declaration instructing how
Lazy loading, the practice of loading resources when needed and not before that, is often implemented on websites as faster loading times can be crucial for user experience or Google's rating systems. Since July 2018 Google has increased the importance of page speed in its website grading systems, so faster loading websites have way better
The SQL DELETE statement is used to delete existing records in a table. DELETE FROM table_name WHERE condition; Parameters: DELETE FROM table_name - The name of the table where records will be deleted.WHERE condition – Specifies which records should be deleted. If you omit it, all records in the table will be deleted. Example: Consider the Products
Applications often need a large amount of resources in order to run completely and without errors. However, different modules, forms, etc. of an application usually need different sets of resources to be loaded and not all of them. While all resources can be loaded at once, it would sometimes cost a lot of time to
The SQL WHERE clause is used to filter rows and return only those that meet the specified criteria. It is used in conjunction with the SELECT, UPDATE, DELETE, etc. statements and takes the following general form: SELECT column_name [, column_name ...] FROM table_name WHERE condition; The WHERE clause can be used along with AND, OR,
Subversion, or simply SVN, is an open source file repository manager. Its purpose is to store every version of every file that has been uploaded on the main server. That way developers can track all the changes, revert to older versions of a file, compare edits and deal with mess-ups. Each developer has access to
Well designed websites do not consist of completely independent pages. They give the feeling of a continuously running application. Good design practice is to offer the site visitors similar interface and user experience no matter where they are on the website. The most common shared interface between different pages of the same website is about
Array An array is a linear data structure consisting of a collection of similar data type elements, each identified by at least one index or key. The size of the array must be specified at the time of its declaration. It is fixed and cannot be resized during runtime. In the array, elements are organized
