Shruti Speak's

First let me introduce to concept of back links Backlinks are links that are directed towards a webpage. Popularly called Inbound links. The number of backlinks to a webpage act as vote for the webpage. It also adds to the popularity of the webpage. Google's first published algorithm is based on Page rank. According to the Page rank algorithm inbound links are counted as vote for the page and outbound as links as votes which the webpage provides to other pages. Since back links are immense part of page rank algorithm they are important from a Search Engine optimizer point of view. Backlinks need to be quality backlinks for better ranking of web page According to Search Engine a backlink is a quality backlink if it is relvant for the keyword for which it has been created. further theme of the voting website is similar to the theme of the voted website. Thus we cannot be satisfied with merely getting inbound links we need to keep a check on the quality of the inbound lin...

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. General use Push services are often based on information preferences expressed in advance. This is known as a publish/subscribe model. A client might "subscribe" to various information "channels". Whenever new content is available on one of those channels, the server would push that information out to the user. Synchronous conferencing and instant messaging are typical examples of push services. Chat messages and sometimes files are pushed to the user as soon as they are received by the messaging service. Both decentralized peer-to-peer programs and centralized programs allow pushing files, this means the sender initiates the data transfer rathe...

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 periodi...

The Post Office Protocol version 3 (POP3), is an application-layer Internet standard protocol, to retrieve e-mail from a remote server over a TCP/IP connection. POP3 and IMAP4 (Internet Message Access Protocol) are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern e-mail clients and servers support both Overview The design of POP3 and its procedures supports end-users with intermittent connections (such as dial-up connections), allowing these users to retrieve e-mail when connected and then to view and manipulate the retrieved messages without needing to stay connected. Although most clients have an option to leave mail on server, e-mail clients using POP3 generally connect, retrieve all messages, store them on the user's PC as new messages, delete them from the server, and then disconnect. In contrast, the newer, more capable Internet Message Access Protocol (IMAP) supports both connected (online) and disconnected (offline) modes o...

IPv6 Internet Protocol version 6 (IPv6) is an Internet Layer protocol for packet-switched internetworks. IPv4 is currently the dominant Internet Protocol version, and was the first to receive widespread use. The Internet Engineering Task Force (IETF) has designated IPv6 as the successor to version 4 for general use on the Internet. IPv6 has a much larger address space than IPv4, which provides flexibility in allocating addresses and routing traffic. The extended address length (128 bits) is intended to eliminate the need for network address translation to avoid address exhaustion, and also simplifies aspects of address assignment and renumbering, when changing Internet connectivity providers. The very large IPv6 address space supports 2128 (about 3.4×1038) addresses, or approximately 5×1028 (roughly 295) addresses for each of the roughly 6.5 billion (6.5×109) people alive today. In a different perspective, this is 252 addresses for every observable star in the known universe mor...

A computer program that is responsible for accepting HTTP requests from web clients, which are known as web browsers, and serving them HTTP responses along with optional data contents, which usually are web pages such as HTML documents and linked objects (images, etc.). Common features Although web server programs differ in detail, they all share some basic common features. 1. HTTP: every web server program operates by accepting HTTP requests from the client, and providing an HTTP response to the client. The HTTP response usually consists of an HTML document, but can also be a raw file, an image, or some other type of document (defined by MIME-types). If some error is found in client request or while trying to serve it, a web server has to send an error response which may include some custom HTML or text messages to better explain the problem to end users. 2. Logging: usually web servers have also the capability of logging some detailed information, about client requests and s...