Cisco Networking OSI Model Layer 1 Physical. Programming. Networking. Purple/v4/dc/ac/80/dcac8051-2b21-e468-1d92-4ac75b2d4a21/screen320x480.jpeg' alt='Cisco Binary Games' title='Cisco Binary Games' />Cisco. Cisco Networking OSI Model Layer 1 Physical. Hp 1115 Service Manual. By Edward Tetz The lowest level of the Open System Interconnection OSI model is the physical layer which represents the physical media, such as Category 5e cables and the Ethernet frame type that is used to move the binary data across the network. Because the data is binary, it is composed of two states that represent zeros and ones Zero is electrically off, and one is electrically on. With the OSI model, the application layer is not concerned with the physical media of the network think of it this way, people are not typically concerned with the underlying technology used by their cellphone carriers, such as analog, digital, 1x, Edge, 3. G, or 4. G, as long as they can make calls. If you are a geek, you probably want 4. G or are already on it. So in the cellphone example, you could think of the call dialing and processing features of the cellphone as the application layer, the cellphones Electronic Serial Number ESN or its Subscriber Identity Module SIM as being on the datalink layer, and the service type 3. G or 4. G as the physical layer. The datalink layer cares about the underlying physical service type a SIM based phone does not work with ESN based networks while at the application layer, it only cares that information it sends down the network layers crosses the network and is able to communicate with the call processing application components at the cellphone carriers offices. The physical networking layer could use any or all the variants abgn of 8. Cat. 4, Cat. 5, Cat. Again, typically the user of the device does not care what the technology is as long as it moves the data bits at a rate that is sufficient for their needs for many users, this does not need to be very fast. Dummies collection. This is knowledge every fledgling hacker used to absorb through their pores. Its nobodys fault this changed the obsolescence of hardware terminals and the near. I tried looking on cisco. Has it moved to another location If this one isnt available do you know how the Boson IP subnet calculat 41712.