Routing is the process of selecting paths in a network along which to send network traffic. Routing is performed for many kinds of networks, including the telephone network (Circuit switching) , electronic data networks (such as the Internet), and transportation networks. This article is concerned primarily with routing in electronic data networks using packet switching technology. In packet switching networks, routing directs packet forwarding, the transit of logically addressed packets from their source toward their ultimate destination through intermediate nodes, typically hardware devices called routers, bridges, gateways, firewalls, or switches. General-purpose computers can also forward packets and perform routing, though they are not specialized hardware and may suffer from limited performance. The routing process usually directs forwarding on the basis of routing tables which maintain a record of the routes to various network destinations. Thus, constructing routing tables, which are held in the router's memory, is very important for efficient routing. Most routing algorithms use only one network path at a time, but multipath routing techniques enable the use of multiple alternative paths.
Routing, in a more narrow sense of the term, is often contrasted with bridging in its assumption that network addresses are structured and that similar addresses imply proximity within the network. Because structured addresses allow a single routing table entry to represent the route to a group of devices, structured addressing (routing, in the narrow sense) outperforms unstructured addressing (bridging) in large networks, and has become the dominant form of addressing on the Internet, though bridging is still widely used within localized environments. The Routing Research Group (RRG) is chartered to explore routing and addressing problems that are important to the development of the Internet but are not yet mature enough for engineering work within the IETF. As the Internet continues to evolve, the challenges in providing a scalable and robust global routing system will also change over time. At the moment, the Internet routing and addressing architecture is facing challenges in scalability, mobility, multi-homing, and inter-domain traffic engineering. Thus the RRG proposes to focus its effort on designing an alternate architecture to meet these challenges. Although Internet routing is a broad and active research area, a focused effort at this time is necessary to assure rapid progress towards reaching the goal.
More specifically, we propose to explore architectural alternatives, including, but not limited to, separating host location and identification information. Research and experimentation in addressing and routing algorithms will be encouraged to understand whether this new direction can provide effective solutions, to work out candidate designs as necessary for a complete solution, and to fully understand both the gains and the tradeoffs that the new solutions may bring. The group will produce a list of prioritized design goals and a recommendation for a routing and addressing architecture.
Sumber : http://www.sangoma.com/support/tutorials/tcp_ip.html
More specifically, we propose to explore architectural alternatives, including, but not limited to, separating host location and identification information. Research and experimentation in addressing and routing algorithms will be encouraged to understand whether this new direction can provide effective solutions, to work out candidate designs as necessary for a complete solution, and to fully understand both the gains and the tradeoffs that the new solutions may bring. The group will produce a list of prioritized design goals and a recommendation for a routing and addressing architecture.
Sumber : http://www.sangoma.com/support/tutorials/tcp_ip.html
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