Use Group Policy Objects within Active Directory to specify
The OSI model splits communication tasks into smaller pieces named subtasks. Protocol implementations are computer processes that deal with these subtasks. Particular protocols fulfill subtasks at distinct layers from the OSI model. When these protocols are grouped together to full a whole activity, the assemblage of code is called a protocol stack. The stack is just a group of protocols, arranged in layers, that implements an complete communication method. Each layer from the OSI model features a unique protocol related to it. When way Mcsa Exams more than 1 protocol is needed to complete a communication approach, the protocols are grouped with each other in a stack. An instance of a protocol stack is TCP/IP, which is widely employed by Unix and also the Internetthe TCP and IP protocols are implemented at diverse OSI layers. Windows Server 2008 and Windows Vista involve the next Generation TCP/IP protocol stack, which can be for both version four (IPv4) and version 6 (IPv6) with the World-wide-web Protocol. Why Make sure you Care about Protocol Stacks It might not be incredibly clear appropriate now why you’ll want to care about protocol stacks and the OSI model. Then again, the OSI model along with the protocol stacks for Web communication are the basis upon which the 70-642 exam is built. All issues about todays modern network stem from either the OSI or IP model. Realizing the layers of both models is essential to sound troubleshooting, and even though it might not be obvious as you trudge by way of this background CCNA Certification material, figuring out the OSI model will support when managing a Windows network. Youll see added examples of how knowing the OSI model helps when troubleshooting all through this chapter. Every single layer within the protocol stack receives services from the layer beneath it and delivers ser- vices to the layer above it. It may be better explained like this: layer N uses the services with the layer beneath it (layer N C 1) and supplies services for the layer above it (layer N + 1). For two computers to communicate, exactly the same protocol stacks have to be operating on each laptop. Each layer on each computers stacks need to use compatible protocols in order for the machines to communicate with one another. The computers can have completely different operating systems and nevertheless be able to communicate if they may be running the identical protocol stacks. For instance, a DOS machine running IP can communicate with a Macintosh machine running IP (see Figure 1.1).
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