By Kent Hundley
By way of delivering the hot carrier Routing Certification software, Alcatel-Lucent is extending their succeed in and information to networking pros with a entire demonstration of the way to construct clever, scalable networks. Serving as a “course in a e-book” from Alcatel-Lucent—the global chief in designing and constructing scalable systems—this source pinpoints the pitfalls to prevent whilst development scalable networks, examines the main profitable thoughts to be had for engineers who're construction and working IP networks, and offers overviews of the web, IP routing and the IP layer, and the perform of commencing the shortest course first.Note: CD-ROM/DVD and different supplementary fabrics should not integrated as a part of e-book dossier.
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Extra resources for Alcatel-Lucent Scalable IP Networks Self-Study Guide: Preparing for the Network Routing Specialist I (NRS 1) Certification Exam (Self Study Guide Exam 4ao-100)
In contrast, some of the cable and satellite providers are offering Internet services such as voice and data and also are able to peer with other ISPs and content providers and, in turn, compete with the telecom providers and other ISPs. Deregulation has also allowed companies who traditionally were able to offer only single services such as voice or cable, to offer new services in a wide-open, competitive services marketplace. A major motivation behind the bundling of traditionally offered individual services is cost reduction.
Some of the protocols commonly used at this layer include Asynchronous Transfer Mode (ATM), Frame-Relay, Point to Point Protocol (PPP), and Ethernet. However, there are many other protocols used; some are open standards, and some are proprietary. The diversity of the network interfaces layer demonstrates one of the benefits of protocol layering. As new transmission technologies are developed, it is not necessary to make changes to the upper layers to incorporate these technologies into the network.
To accomplish this reliable transfer, TCP packages the application data with a TCP header. On the receiving end of the connection, the TCP protocol removes the TCP header and reconstructs the application data stream exactly as it was received from the application on the sender’s side of the network. In other words, TCP simply takes the data given to it by the upper layer application, and passes it to the upper layer application at the other end without trying to interpret the contents. Any protocol-specific formatting of the data is up to the upper layers.