Lag (English lag behind, falling behind, left behind) is the delay in a difficult telecommunications normal development of the same, causing disorientation or discomfort to the user. While all long-distance communication means some delay in the arrival of messages, the term "lag" applies when the delay is long enough to hinder the interaction between users and make evident the lack of simultaneity. The lag occurs especially in satellite telephone communications, in which the signal can take a few tenths of a second. The feeling that occurs is that the speaker takes to answer, so the conversation is annoying. It also occurs on the Internet when a Web page takes to load or when viewing live content (TV channel online, online radio, streaming video) that transmits at speeds less than the bandwidth, this is stopped or lost quality, also the case in the chat of some programs that are solely intended for communication via instant messaging, and other file sharing such as P2P, to cite one example. It happens that the messages of other users of the room (or, as they say, "screen" are frozen and if the problem is temporary leave messages at high speed suddenly. This depends on whether, for example, the chat is lively and sent many messages when lag occurs, and after a while, if there is a lot of those who were "on hold", to sweep out the old messages but if the chat is somewhat sluggish and lag occurs, new outgoing messages do not interfere with the above as being only a few pushes before, but not making sweeping lost to normalize the problem. Another modern case occurs in massive online games, where sometimes a character is stopped for a few seconds, and after a while the server messages will be received at high speed causing a horrible gameplay, often resulting in loss heading or any penalty points, causing real problems for players. Causes of lag in computer networks and online games
Poor network performance Packages are interrupted in their way due to faulty routers, the network can not handle the amount of required packages (see: bandwidth) or the packets pass through an unusually large number of routers before reaching its destination. Insufficient server processing power The lag can also be experienced when the user makes a request that is not in the cache and the answer requires a lot of processing before being sent. This applies to multiplayer games usually in the peak hours where the server is required by having to process information from a huge number of users connected. Insufficient processing power of client This is caused by lack of RAM or virtual memory, which is insufficient even with the fastest connection, a slow computer may have problems processing the information being transmitted if multiple applications are running simultaneously, plus the spywares and programs peer-to-peer system efficiency decreases and the connection. Slow computers can be updated easily in hardware and software to improve its efficiency. It also helps remove spyware, trojans and viruses, and stopping peer-to-peer networks that are running simultaneously or configure the program to peer-to-peer Internet file does not load, just download.