Ethernet Networking- P1 pdf

[...]... protocol) Ethernet is a MAC protocol It is one way to regulate physical access to network transmission media You will learn how it works in Chapter 2 Note" Until just a few years ago, there were viable alternatives to Ethernet (in partiuclar, IBM's Token Ring) However, Ethernet has become the only wired MAC protocol for which hardware is still being produced You can have Ethernet, or you can have Ethernet, ... can have Ethernet unless you go wireless, which as you will see later in this book, has some major issues (primarily security, but also performance) that make it problematic for all but the smallest networks Types of Ethernet Ethernet is actually a collection of networking standards, some of which are outdated and not used any more (See Appendix A for a discussion of the earlier versions of Ethernet. )... Types of Ethernet 17 When considering Ethernet speeds, keep in mind that the transfer rates associated with each type of Ethernet are maximums In practice, it is rare to achieve the highest transfer rate Many factors limit network speed, including the nature of the transmission media, the amount of traffic on the network, and the speeds of the hardware manipulating the network In addition, an Ethernet. .. versions of Ethernet. ) Today there are three versions of Ethernet that you are likely to encounter in a small network, distinguished by their transmission speeds" Standard Ethernet (also known as I OBASE-T): Transfers data at a maximum of 10 megabits per second (abbreviated 10 M bps) At today's prices, it is possible to set up a simple eightdevice standard Ethernet LAN for less than $100 This assumes that... for even small networks 10 Gigabit Ethernet: Transfers data at a maxminum of 10 gigabits per second (10 Gbps) Initially designed to run over fiber optic cabling for use in WANs, 10 Gb Ethernet has now migrated to copper wire and can be used within a LAN Keep in mind, however, that very few individual devices can transmit and receive data at 10 Gbps Therefore, LAN 10Gb Ethernet is best suited for large... run 10 Gb Ethernet to a single destkop device; such a setup would not be economically efficient Note: The next Ethernet speed jump will probably be to 40 Gbps, although there is no official standard for this speed yet This WAN implementation is intended only for fiber optic cabling Will there be an even faster version? Never say "never": Some writers are currently talking about 100 Gbps Ethernet, even... distribution you purchase Therefore, the only way to talk about networking that can be certain to apply to all distributions of Linux is look at the command line 15 What Ethernet Really Means What Ethernet Really Means Where does Ethernet fit into all of this? In the Physical layer In a LAN or intranet, there are many pieces of hardware trying to gain access to the network transmission media at the... has significantly increased the utilization.) Given that Ethernet and the data transmission protocols that run on top of it (TCP/IR IPX/SPX, and AppleTalk) are independent, when you choose Ethernet over some other form of physical network, you are restricting your hardware choices rather than your software choices As you will see, the type of Ethernet you choose dictates to some extent what hardware... Bandwidth Connection The types of Ethernet are defined in terms of their maximum transmission speeds Nonetheless, they can in most cases use the same type of wiring Assume, for example, that standard, Fast, and Gigabit Ethernet are all using the same wire medium Electrical signals can travel at only one physical speed over the medium How can this be true if there are multiple Ethernet speeds? The answer... network gurus One of my greatest frustrations with networking books is that they often focus on only one layer of the network To be technically accurate, "Ethernet" refers to only one part of the hardware However, if you are going to be responsible for an Ethernet network, then you need to know a lot more than just how to choose and configure your network hardware You also need information about the devices . Network Operating Systems 14 What Ethernet Really Means 15 Types of Ethernet 15 The Speed and Bandwidth Connection 17 Ethernet Standards 18 A Bit of Ethernet History 19 Confenfs iii iv. Layer 31 The Ethernet MAC Protocol 33 Ethernet Frames 33 Ethernet Media Access 35 Alternative Protocol Stacks 38 Part Two: Design and Connectivity Chapter 3: Fast and Gigabit Ethernet Media. Multimode Fiber Optics 48 Fiber Optic Cable Bundles 49 Fast Ethernet Standards 50 Twisted-Pair Wire 51 Fiber Optics 51 Gigabit Ethernet Standards 52 Fiber Optics 52 Twisted-Pair Wire 53