Skip to main content

Push Technology /Pull Technology




Pull Technology

Pull technology or client pull is a style of network communication where the initial request for data originates from the client, and then is responded to by the server. The reverse is known as push technology, where the server pushes data to clients. Pull requests form the foundation of network computing, where many clients request data from centralized servers. Pull is used extensively on the Internet for HTTP page requests from websites.

A push can also be simulated using multiple pulls within a short amount of time. For example, when pulling POP3 email messages from a server, a client can make regular pull requests every few minutes. To the user, the email then appears to be pushed, as emails appear to arrive close to real-time. The tradeoff is this places a heavier load on both the server and network in order to function correctly.

Most web feeds, such as RSS are technically pulled by the client. With RSS, the user's RSS reader polls the server periodically for new content; the server does not send information to the client unrequested. This continual polling is inefficient and has contributed to the shutdown or reduction of several popular RSS feeds that could not handle the bandwidth.


Push Technology

Push technology, or server push, is a style of Internet-based communication where the request for a given transaction originates with the publisher or the server. It is in contrast with pull technology, where the request for the transmission of information originates with the receiver or the client.
Labels:

Comments

Post a Comment

Popular posts from this blog

Simulation Practice Problems

1. There is only one telephone in a public booth of a metro station. Following table indicates the distribution of arrival time and duration of calls: Time Between arrivals (minutes) 4 5 6 Probability 0.1 .6 0.3 Call Duration (minutes) 3 4 5 6 Probability 0.14 0.6 0.12 0.14 Simulate for 100/500/1000 times. Conduct 3 such trials. It is proposed to add another telephone to the booth. Justify the proposal based on the waiting time of caller.Generate graphs to support your answer. 2. A baker needs to find out the cookies he need to bake each day. The probability distribution for the cookies customers is as follows: Number of customers/day 7 9 11 14 Probability 0.35 0.30 0.15 0.20 C...
Post a Comment
Read more

System Analysis and Design (SAD)

Introduction to System Analysis and Design (SAD) System are created to solve Problems. One can think of the systemsapproch as an organised way of dealing with a problem. In this dynamic world , the subject system analysis and design, mainly deals with the software development activities. This post include:- What is System? What are diffrent Phases of System Development Life Cycle? What are the component of system analysis? What are the component of system designing? What is System? A collection of components that work together to realize some objectives forms a system. Basically there are three major components in every system, namely input, processing and output. In a system the different components are connected with each other and they are interdependent. For example, human body represents a complete natural system. We are also bound by many national systems such as political system, economic system, educational system and so forth. The objective of the system demands tha...
37 comments
Read more
Advantages and Disadvantages of EIS Advantages of EIS Easy for upper-level executives to use, extensive computer experience is not required in operations Provides timely delivery of company summary information Information that is provided is better understood Filters data for management Improves to tracking information Offers efficiency to decision makers Disadvantages of EIS System dependent Limited functionality, by design Information overload for some managers Benefits hard to quantify High implementation costs System may become slow, large, and hard to manage Need good internal processes for data management May lead to less reliable and less secure data
1 comment
Read more