HTTP persistent connection, also called HTTP keep-alive, or HTTP connection reuse, is the idea of using a single TCP connection to send and receive multiple HTTP requests/responses, as opposed to opening a new connection for every single request/response pair.
What is the use of HTTP protocol?
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text.
The servlet container uses this interface to create a session between an HTTP client and an HTTP server. The session persists for a specified time period, across more than one connection or page request from the user. A session usually corresponds to one user, who may visit a site many times.
The HTTP CONNECT method method starts two-way communications with the requested resource. It can be used to open a tunnel. For example, the CONNECT method can be used to access websites that use SSL (HTTPS). The client asks an HTTP Proxy server to tunnel the TCP connection to the desired destination.
HTTP tunneling is the process in which communications are encapsulated by using HTTP protocol. An HTTP tunnel is often used for network locations which have restricted connectivity or are behind firewalls or proxy servers.
Keep alive is a method to allow the same tcp connection for HTTP conversation instead of opening a new one with each new request. More simply put, it is a communication between the web server and the web browser that says "you can grab more than just one file at a time".
HTTP pipelining is a technique in which multiple HTTP requests are sent on a single TCP connection without waiting for the corresponding responses.
HTTP defines how the messages are formatted and transmitted. Therefore, HTTP is called a stateless protocol. HTTP can use both nonpersistent connections and persistent connections. A nonpersistent connection is the one that is closed after the server sends the requested object to the client.
Definition of nonpersistent. : not persistent: such as. a : decomposed rapidly by environmental action. nonpersistent insecticides.
Non-volatile memory is typically used for the task of secondary storage, or long-term persistent storage. The most widely used form of primary storage today is a volatile form of random access memory (RAM), meaning that when the computer is shut down, anything contained in RAM is lost.
In the world of virtual desktop infrastructure, there are two basic kinds of desktops: persistent (also called personal or one-to-one) and nonpersistent (also called shared or many-to-one). Many VDI proponents claim that nonpersistent desktops are the way to go because they're easier to manage than persistent VDI.
Virtual desktop infrastructure (VDI) is virtualization technology that hosts a desktop operating system on a centralized server in a data center. VDI is a variation on the client-server computing model, sometimes referred to as server-based computing. The term was coined by VMware.
Persistence is "the continuance of an effect after its cause is removed". In the context of storing data in a computer system, this means that the data survives after the process with which it was created has ended. In other words, for a data store to be considered persistent, it must write to non-volatile storage.
Here are six (6) ways to help you develop persistence:
- Identify Your Wants and Desires.
- Determine Your Motivation.
- Outline Your Definite Action Step.
- Keep a Positive Mental Attitude.
- Build Your Mastermind Group.
- Develop Discipline and Habit.
Volatile memory is computer storage that only maintains its data while the device is powered. Most RAM (random access memory) used for primary storage in personal computers is volatile memory.
RAM is called 'volatile' memory by analogy because if the computer loses power, all the data stored in RAM (or other volatile memory) is lost or 'evaporates'. Non-volatile memory is memory that keeps its data while the system isn't running.
Dynamic random-access memory (DRAM) is a type of random access semiconductor memory that stores each bit of data in a separate tiny capacitor within an integrated circuit. Unlike flash memory, DRAM is volatile memory (vs. non-volatile memory), since it loses its data quickly when power is removed.
The avoirdupois dram contains 27.344 grains (1.772 grams) and is equal to one-sixteenth avoirdupois ounce of 437 12 grains. The term also refers to the fluid dram, a measure of capacity equal to one-eighth fluid ounce.