Download Computer Networks: A Systems Approach (5th Edition) (The by Bruce S. Davie, Larry L. Peterson PDF
By Bruce S. Davie, Larry L. Peterson
This best-selling and vintage ebook teaches you the main ideas of computing device networks with examples drawn from the genuine international of community and protocol layout. utilizing the web because the basic instance, the authors clarify a variety of protocols and networking applied sciences. Their systems-oriented process encourages you to contemplate how person community parts healthy right into a higher, complicated method of interactions. no matter what your point of view, no matter if or not it's that of an software developer, community administrator, or a dressmaker of community gear or protocols, you'll come away with a "big picture" figuring out of the way glossy networks and their purposes are built.
*Completely up to date content material with increased insurance of the themes of extreme value to networking execs and scholars, together with P2P, instant, safeguard, and applications.
*Increased concentrate on software layer matters the place cutting edge and interesting learn and layout is at the moment the heart of attention.
*Free downloadable community simulation software program and lab experiments handbook on hand.
Read or Download Computer Networks: A Systems Approach (5th Edition) (The Morgan Kaufmann Series in Networking) PDF
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Extra info for Computer Networks: A Systems Approach (5th Edition) (The Morgan Kaufmann Series in Networking)
The message passed up from RRP to the application on host 2 is exactly the same message as the application passed down to RRP on host 1; the application does not see any of the headers that have been attached to it to implement the lower-level communication services. 12. 12 High-level messages are encapsulated inside of low-level messages. , switches and routers) may inspect the HHP header at the front of the message. Note that when we say a low-level protocol does not interpret the message it is given by some high-level protocol, we mean that it does not know how to extract any meaning from the data contained in the message.
The process of determining systematically how to forward messages toward the destination node based on its address is called routing. This brief introduction to addressing and routing has presumed that the source node wants to send a message to a single destination node (unicast). While this is the most common scenario, it is also possible that the source node might want to broadcast a message to all the nodes on the network. Or, a source node might want to send a message to some subset of the other nodes but not all of them, a situation called multicast.
In this particular case, the application is said to employ the services of the protocol stack RRP/HHP. Note that the term protocol is used in two different ways. Sometimes it refers to the abstract interfaces—that is, the operations deﬁned by the service interface and the form and meaning of messages exchanged between peers, and sometimes it refers to the module that actually implements these two interfaces. To distinguish between the interfaces and the module that implements these interfaces, we generally refer to the former as a protocol speciﬁcation.