RE: Physical Layer and Data Link Layer Jermaine Huggins 9/6/2016 7:25:45 Bad network cabling can quickly lead to a whole lot of issues such as latency, noise and crosstalk. As Diana stated this can be preventing by having proper planning and using installing cabling that will support the usage needs of the company. The company, if budget allows, should invest in fiber optics. If not all drops then minimum for the backbone part of the network. A 10 Gb fiber backbone between each communications closet can be very effective, althoug they need so much unless massive amounts of data need to be transferred. Personally I have never seen a building with so many LANs, VLANs yes; I wou keeping voice/video on separate VLANs is one of the best techniques. Things to keep in mind when installing new networks; * overspending on a network is as bad as under spending if resources are not use wisely. * having an adequate floor blueprint to identify walls, water pipes, concrete walls and metals that can create challenges with wiring and signal strength.
9/25/2016 Topic Print View (NEXT(9aa8e367917140bc999f3323f7766024))/Main/CourseMode/Topic/TopicPrintView.ed?topicID=6000009372547&so… 2/18 * central network placement Cat5/6 max length is 100 meters before signal is degraded. Servers should be no more than 100 meters from where the wir needed. RE: Physical Layer and Data Link Layer Leslie Thames 9/6/2016 8:57:45 The data link layer is often conceptually divided into two sublayers: logical link control (LLC) and media access control (MAC). T based on the architecture used in the IEEE 802 Project, which is the IEEE working group responsible for creating the standards th many networking technologies (including all of the ones I mentioned above except FDDI). By separating LLC and MAC functions, interoperability of different network technologies is made easier, as explained in our earlier discussion of networking model con name “physical layer” can be a bit problematic. Because of that name, and because of what I just said about the physical layer a transmitting data, many people who study networking get the impression that the physical layer is only about actual network ha Some people may say the physical layer is “the network interface cards and cables”. This is not actually the case, however. The layer defines a number of network functions, not just hardware cables and cards. RE: Physical Layer and Data Link Layer Melody Barnhill 9/11/2016 9:29:3 The data link layer ensures that all packets of information are passed on free of errors. It makes sure the appropriate physical protocol is assign data. The data link layer is the second layer in the OSI Model. The three main functions of the data link layer are to deal with transmission errors the flow of data, and provide a welldefined interface to the network layer. When it transfers the data to the network layer, it uses timers and seq numbers to check for errors to ensure that all data is successfully received. The data link layer has different services and protocols to complete its
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