All the best from Expert Articles.http://www.expertarticles.com//article/Computers/Wireless-Networks/Network-Application-Architectures.htmlBefore diving into software coding, you should have a broad architectural plan for your application. Keep in mind that an application's architecture is distinctly different from the network architecture. From the application developer's perspective, the network architecture is fixed and provides a specific set of services to applications. The application architecture, on the other hand, is designed by the application developer and dictates how the application is structured over the various end systems/article/Computers/Wireless-Networks/Network-Application-Architectures.html/article/Computers/Wireless-Networks/Networks-Under-Attack.html The field of network security is about how the bad guys can attack computer networks and about how we, soon to be experts in computer networking, can defend networks against those attacks, or better yet, design new architectures that are immune to such attacks in the first place. /article/Computers/Wireless-Networks/Networks-Under-Attack.html/article/Computers/Wireless-Networks/Wireless-Access.html Accompanying the current Internet revolution, the wireless revolution is also having a profound impact on the way people work and live. Today, more people in Europe have a mobile phone than a PC or a car. And the wireless trend is continuing with many analysts predicting that wireless (and often mobile) handheld devices such as mobile phones and PDAs will overtake wired computers as the dominant Internet access devices throughout the world. Today, there are two common types of wireless Internet access./article/Computers/Wireless-Networks/Wireless-Access.html/article/Computers/Wireless-Networks/Messages-Segments-Datagram-s-and-Frames.htmlThe physical path that data takes down a sending end system's protocol stack, up and down the protocol stacks of an intervening link layer switch and router, and then up the protocol stack at the receiving end system. As we discuss later in this book, routers and link layer switches are both packet switches./article/Computers/Wireless-Networks/Messages-Segments-Datagram-s-and-Frames.html/article/Computers/Wireless-Networks/History-of-Computer-Networking-and-the-Internet.html You should know enough now to impress your family and friends! However, if you really want to be a big hit at the next cocktail party, you should sprinkle your discourse with tidbits about the fascinating history of the Internet. /article/Computers/Wireless-Networks/History-of-Computer-Networking-and-the-Internet.html/article/Computers/Wireless-Networks/Network-Application-Architectures.htmlBefore diving into software coding, you should have a broad architectural plan for your application. Keep in mind that an application's architecture is distinctly different from the network architecture./article/Computers/Wireless-Networks/Network-Application-Architectures.html/article/Computers/Wireless-Networks/ISPs-and-Internet-Backbones.htmlWe saw earlier that end systems (user PCs, PDA's, Web servers, mail servers, and so on) connect into the Internet via an access network. Recall that the access network may be a wired or wireless local area network (for example, in a company, school, or library), a residential cable modem or DSL network, or a residential ISP (for example. AOL or MSN) that is reached via dial up modem. But connecting end users and content providers into access networks is only a small piece of solving the puzzle of connecting the hundreds of millions of end systems and hundred of thousands of networks that make up the Internet. /article/Computers/Wireless-Networks/ISPs-and-Internet-Backbones.html/article/Computers/Wireless-Networks/File-Transfer-Protocol-FTP.htmlWe have just learned that network processes communicate with each other by sending messages into sockets. But how are these messages structured? What are the meanings of the various fields in the messages./article/Computers/Wireless-Networks/File-Transfer-Protocol-FTP.html/article/Computers/Wireless-Networks/How-Do-Packets-Make-Their-Way-Through-Packet-Switched-Networks-.html Earlier we said that a muter takes a packet arriving on one of its attached communication links and forwards that packet on to another of its attached communication links. But how does the router determine the link onto which it should forward the packet? This is actually done in different ways by different types of computer networks we will describe one popular approach, namely. The approach employed by the Internet. In the Internet, each packet traversing the network contains the address of the packet's destination in its header./article/Computers/Wireless-Networks/How-Do-Packets-Make-Their-Way-Through-Packet-Switched-Networks-.html/article/Computers/Wireless-Networks/Upgrading-your-Network-Hardware-Infrastructure.htmlJust like you want to learn about a date's likes and dislikes to see if there is potential for long term compatibility, you also need to carefully plan the integration of new and updated network hardware into your older structures. /article/Computers/Wireless-Networks/Upgrading-your-Network-Hardware-Infrastructure.html