12/23/2023 0 Comments Tcp ackSymmetry: A PEP implementation may be symmetric or asymmetric.This is quite common in commercial PEP devices, which act as a black box, using more or less open protocols to communicate between them in the place of TCP. Integrated PEP will run on a single box, while distributed PEP will require to be installed on both sides of the link that cause the performance degradation. Distribution: PEPs can be either integrated or distributed.This is based on the OSI level of implementation of the PEP. In the latter case, the proxy controls the transmissions of the TCP segments in both directions, by ack filtering and reconstruction in the existing connection (see protocol spoofing). In the first case, the proxy pretends to be the opposite endpoint of the connection in each direction, literally splitting the connection into two. Proxy type: A PEP can either 'split' a connection or 'snoop' into it.Mechanism of a Distributed Split PEP on Protocol Layer Classification Īvailable PEP implementations use different methods to enhance performance. PEP standards are defined in RFC 3135 (PEPs intended to mitigate link-related degradations) and RFC 3449 (TCP performance implications of network path asymmetry). A Socket belongs to a certain Namespace (by default /) and uses an underlying Manager to communicate.Ī Socket is basically an EventEmitter which sends events to - and receive events from - the server over the network.Performance-enhancing proxies ( PEPs) are network agents designed to improve the end-to-end performance of some communication protocols. Socket Ī Socket is the fundamental class for interacting with the server. Sets the timeout option, or returns it if no parameters are passed. Other keys will be ignored and should be passed when instancing a new Manager(nsp, options). Only auth ( ) is read from the options object. manager.socket(nsp, options) Ĭreates a new Socket for the given namespace. Sets the reconnectionDelayMax option, or returns it if no parameters are passed. Sets the reconnectionDelay option, or returns it if no parameters are passed. Sets the reconnectionAttempts option, or returns it if no parameters are passed. Sets the reconnection option, or returns it if no parameters are passed. Query parameters can also be provided, either with the query option or directly in the url (example: To understand what happens under the hood, the following example: For example, if the url is a transport connection will be established to and a Socket.IO connection will be established to /users. Passing this option is the equivalent of passing "force new connection": true or forceNew: true.Ī new Socket instance is returned for the namespace specified by the pathname in the URL, defaulting to /.
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