Ok, what grade are you in.
I'm really not trying to be derogatory, but after I read through your document I came to the conclusion that you basically cut and pasted entire statements from your different sources. There were no transitions, and several times you changed your flow mid stream.
In 1985, the Institute of Electrical and Electronic Engineers (IEEE) in the United States of America produced a series of standards for Local Area Networks (LANs) called the IEEE 802 standards. These have found widespread acceptability and now form the core of most LANs. One of the IEEE 802 standards, IEEE 802.3, is a standard often referred to as "Ethernet". This protocol has become the defacto standard for most local area networks (small networks) and even some wide area networks (extremely large networks).
The above is an excellent start. It describes what you are talking about and why. NOW: The history should be in a different paragraph.
The original Ethernet began its rise to the top at the Xerox Palo Alto Research Center (PARC). The main reason for developing Ethernet was to share very expensive printers. Robert Metcalf (who went on to found 3COM Corp) was working at Xerox PARC and is often considered the "father" of Ethernet. He designed a protocol that would serve in networks with sporadic and occasionally heavy traffic requirements. It was originally capable of operating at a blistering 3 Mbps, using >>the now famous<< Carrier Sense Multiple Access with Collision Detect (CSMA/CD), and utilized a network media of 75 Ohm coaxial cable.
lose the now famous and use something like "a protocall called"
utilized and used are the same word. change "and utilized a network" to and "traveled through networks constructed of"
Take a look at this end of paragraph sentence and the next:
When collisions occur, both transmissions are destroyed and the stations will have to retransmit at a later time.
A collision domain is defined as an area within which frames are propagated.
Looks like you cut it directly out of a book, there's no transition. Why did we go from talk about collisons to defining collision domains? How are the two related? Frames? WTF are frames and why is that word used here? You've said nothing about frames but expect us to know what they are all of a sudden.
Ahh, suddenly it makes sense.
A collision domain is defined as an area within which frames are propagated. Since hubs and repeaters propagate collision domains, an understanding of how to segment networks is needed. An easy way to remember how the segments of a LAN should be populated is the 5-4-3 rule. The 5-4-3 rule is a general rule of which should be used when planning the network topology. Something to be remembered is that the last portion of the rule only applies to coaxial cable networks, such as 10Base2 or 10Base5.
You chopped that entire paragraph directly out a book. THAT'S why it doesn't fit AT ALL.
Reading down a bit I came upon this....
100BaseT, or Fast Ethernet, is the improved version of the Ethernet protocol. It is ten times as fast as 10BaseT, retains the IEEE 802.3 frame format, size, and error-detection (CSMA/CD) of its predecessor, and is capable of Full Duplex operation. Full Duplex operation is when data can travel in both directions at the same time. This is an important attribute because it may effectively double your LAN?s available throughput. The version of 802.3 that defines 100BaseT is 802.3u. Under this supplement standard, two variations of 100BaseT signaling standards are discussed: 100BaseTX and 100BaseT4. An important point to remember when installing the topology is the differences in the minimum link performance category and the number of pairs required. Both standards support the TIA/EIA-568-B wiring standard, but the required category of wire differ. 100BaseTX operates on CAT-5 and transmits on the same pairs as 10BaseT. 100BaseT4 can use CAT-3 or better cabling, but uses all four pairs in the cable. The down side to using 100BaseT4 is its low acceptance in the marketplace and limited availability of networking equipment. The choices for hubs, switches, and NICs are limited, and the prices are routinely higher than their 100BaseTX counterparts.
AHA! Now this seems to fit in with that first paragraph....
Ok, I'm done helping you. As far as I can tell you yanked most of this directly out of books. It doesn't even look like you paraphrased the majority of it, it looks like direct quotes. Now I don't know how intelligent your teacher is, but I'd be asking you to be bringing me these books ten minutes into looking at this paper. I may be a little harsh, but I think you ripped the whole thing off.