Computer networks Essay Example | Topics and Well Written Essays - 3500 words

Computer networks - Essay Example Moreover, Cisco devices deliver integration features that will support compatibility and scalability issues with upcoming applications and services. For addressing, network security, again Cisco firewalls are implemented to protect the network from viruses, worms and probes. In summary, Cisco 3845 integrated service router is implemented for exchanging communication from the local area network interface to the WAN interface. The router provides productivity, integration and enhanced features along with Cisco 3845 (ISR) Site-to-Site VPN Support, Cisco 3845 (ISR) Remote Access VPN Support, Cisco 3845 (ISR) Network Admission Control support, Cisco 3845 (ISR) Digital Voice Call support , Cisco Unified Communication Support and Unified Survivable Remote Site Telephony (SRST) support. Moreover, data switches are also acquired from Cisco named as Cisco Catalyst 3750 that provides enhanced features. Moreover, for wireless networks, Cisco Unified Wireless network featuring Cisco Wireless Cont rol System along with Cisco 4400 Series Wireless LAN Controllers are deployed. Furthermore, the wireless network also supports Cisco Clear air Technology. For remote connectivity and scalability, Cisco service mobility engines are installed. For application support, SOAP and XML Support and Context aware Services are available. In addition, for addressing network security, Cisco ASA 5500 Series Adaptive Security Appliances (For Wired Network), AIP-SSM Intrusion Prevention Module and Wireless Intrusion Prevention System (W IPS) (For Wireless Networks) is operational. Fig 1.1 demonstrates the local area network of an organization below: Figure 1.1 (LOCAL AREA NETWORK) Structure and Cabling The current network is constructed on Star topology that is the most widely adopted topology, as it has many benefits when compared to other topologies. By implementing star topology, network engineers can administer and troubleshoot the network more efficiently and effectively. Star topology provid es a one stop monitoring screen that demonstrates activities on the local area network. Likewise, the cost of implementing and managing the local area network is comparatively low, as less resources and low network downtime occurs. Moreover, network security is addressed efficiently, as monitoring of each system or service is carried out

Eli Whitney Essay Example for Free

Eli Whitney Essay Eli Whitney (1765-1825) was a mechanical wizard. While travelling in the south, he became acquainted with the problem of removing the seeds from cotton. Enormous numbers of slaves were employed pulling the seeds out by hand. Eli Whitney spent a whole two weeks on this challenge and invented the cotton gin. He patented the invention and went on to capitalize on his invention by opening a factory to make cotton gins. It ended in bankruptcy. The failure of Eli Whitney to make his fortune on the cotton gin was due primarily to the very simplicity of the design of the machine. Once the initial shipments of Whitneys cotton gin arrived on the cotton plantations of the South, entrepreneurial individuals pried off the top and peered inside. What they saw was eminently copiableand copy they did. The Patent Office in Washington wasnt eager to send agents into the South to enforce Eli Whitneys patent rights, and he couldnt obtain legal redress in the court system, so he eventually walked away from his invention. Business students, in common with all students, are told not to copy. Copying is dishonourable and deserving of dismissal. They graduate and enter a world in which copying is endemic. A new idea is not the property of its originator because everyone copies in all areas of business. If a firm discovers a more efficient way of doing something, it will be copied. If a firm discovers a more effective way of marketing a product, it will be copied. If a firm discovers a more efficacious way of financing its expansion, it will be copied. Copying is critical in understanding the nature of the business cycle. Copying contributes to the ups and downs of the business cycle by directing larger investments into new areas than would occur if copying were not so endemic. The building of a greater number of factories than is necessary is a consequence of copying that helps to keep the good times good. (Randall Bartlett, 1998). On the other side of the coin, copying can cause businesses to dedicate too much productive capacity to new products. When all the investments are completed and the combined productive capacity of a thousand and one copyists is brought to bear on the market, all the copyists have for their efforts are huge unsold inventories and excessive productive capacity. Then they copy one another again by collectively slashing production to try to keep inventories in line with sales. This type of copying helps to turn good times into bad. One might expect that patent protection should limit copying. However, if what is being copied is a strategy for marketing or making financial deals, there is no patent infringement because an idea cannot be patented. Even copyrights on computer software have been difficult to enforce because a program can be essentially copied by rewriting it with minor editorial changes, such as calling something X that was called Y in the original program. Patents on products and processes are enforceable within a given nation, but they are more difficult to enforce in the international arena. Thus, a firm can spend millions to develop a new product and find itself in the position of not being able to recoup its research and development expenditures because copies are being imported from foreign copiers that do not have to price the goods on the basis of recouping the initial RD expense. The globalization of manufacturing facilities and free trade has proved to be a boon for copyists. The simplicity of the cotton gin, the ease of copying it, and Whitneys sad return on his investment in his invention are of interest in understanding the role of copying in the business cycle. But the real point of this discussion is Eli Whitney on the comeback trail. Whitney obtained a government contract to make ten thousand muskets. The contract presumed that he would make the muskets in the way that all muskets, and everything else, were made. In the cottage industry of the day, a musket was assembled by an individual who made a barrel, a stock, a flintlock, a trigger, and the other mechanical parts. As each part was made, it was filed to fit the rest of the components making up the musket. The result of this mode of production was that each particular part of a musket was unique. A flintlock made for a musket could not be removed and interchanged with the flintlock of another musket and be expected to work. The parts were not interchangeable without further filing because they were not uniform in design and would not fit together properly. Each musket was, in effect, tailor made to its own set of specifications. (David Burner, Elizabeth Fox-Genovese, Virginia Bernhard, 1991). To fill his contract with the government, Eli Whitney built a factory near New Haven, Connecticut, in 1798, that was unique in several respects. Water-powered machines were designed to replace human effort as much as possible. The machines were dedicated to the manufacture of the individual component parts of a specified design, rather than each part being individually handmade. In other words, Eli Whitney was substituting machine labour for manual labour, thereby increasing the productivity of labour. In Whitneys factory, the parts produced were of sufficiently close tolerances to be interchangeable. Quality control was introduced to ensure that the flintlock of one musket would be interchangeable with the flintlock of another with no additional filing. Eli Whitneys uniformity system had at its core the idea of manufacturing ten thousand barrels, ten thousand stocks, ten thousand flintlocks, ten thousand trigger mechanisms, ten thousand whatever, all of sufficiently close tolerances to be interchangeable without additional filing. The parts were manufactured first, and the completed musket was assembled later. Whitneys uniformity system was the forerunner of todays assembly line. Eli Whitney gave to modern society the most productive means of manufacture known to mankind. There are those who can point to the fact that he did not originate the idea, that it had antecedents in Europe. That is true and bears about as much weight as the fact that Christopher Columbus was not the first European to discover America. Leif Ericsson may, or may not, have been first. Even if Ericsson was first, what does that do to take away from Columbus achievement? It was the discovery of America by Columbus that counts. The nations of North and South America owe their existence to Columbus explorations, not to Ericssons. The same holds true for Whitneys uniformity system. More than any other individual, he popularized the idea of Adam Smiths specialization of labour. Eli Whitney vastly increased the productivity of his specialized labour force by replacing tools with machines and by introducing quality control measures to ensure that the interchangeable parts were indeed interchangeable. His water-powered factory in New Haven was the progenitor of many such plants in the northern states. Daniel A. Wren, Ronald G. Greenwood, 1999). Eli Whitney affected the course of the development of the United States in two quite unintentional ways. The removal of the cotton seeds by the cotton gin rather than by a slaves fingers had a dramatic impact on the profitability of growing cotton in the South. One might conclude that the price of slaves would fall with the invention of the cotton gin because the labour required to remove the seeds from the cotton was nearly eliminated. Was there no other impact that might have turned out to be true? But the cotton gin made cotton growing much more profitable because the slaves could dedicate more of their time to planting and harvesting the cotton rather than to removing its seeds. Nothing did more to spread the growing of cotton in the South than did the cotton gin. As new areas of the South were brought under cultivation, there was a greater demand for slaves. The price of slaves increased, and the institution of slavery, which was actually waning at the time of the invention of the cotton gin, was given new life. The South embarked on a path of agriculture based on slave labour. In the North, just the opposite occurred. Whitneys factory in New Haven was a cause of the Norths embarking on a path of industrialization, based, as some would assert, on wage-slave labour. As in the South, Eli Whitney himself had no pretensions of embarking on anything. He invented the cotton gin and tried to make a buck from his invention. When that failed, he devised the uniformity system to make a buck out of a government contract. Nevertheless, the social repercussions of his contributions to technology had a significant impact on the history of the nation. (John G. Blair, 1988).

An Analysis of Annabel Lee :: Annabel Lee Essays

An Analysis of "Annabel Lee" Most people agree that Edgar Allan Poe wrote "Annabel Lee" about his departed wife, Virginia Clemm, who died of tuberculosis two years earlier. Some critics, however, contend that in the seventh line of the poem he states, "I was a child and she was a child," and he certainly was no child in 1836 at twenty-seven when he married his thirteen-year-old bride. Maybe the poem is about an earlier love, or perhaps it is purely fictional, but addressing Annabel Lee as his "life and [his] bride" in line thirty-eight and writing it two years after his beloved young wife's death, it is seems logical that it is indeed written about her and is simply embellished with a bit of poetic license. In this poem, Poe writes primarily with a combination of iambic and anapestic feet, alternating between tetrameter and trimeter. The word "chilling," however, is permitted in both places it is used, lines fifteen and twenty-five, to retain its jarring trochaic meter (one stressed syllable followed by an unstressed syllable). This is done most probably to utilize the provoking effect of that meter; the death of the speaker's loved one disturbs the rhythm of the poem and startles the reader. End rhyme in the poem alternates lines with a few variations and bears little significance; the repeated rhyming words are: "Lee," "sea," "me," and "we." In "Annabel Lee" the speaker argues in lines eleven and twelve that the angels were jealous of the happy couple: "the winged seraphs of heaven coveted her and me." The envious angels, he insists, caused the wind to chill his bride and seize her life. However, he contends, their love, stronger than the love of the older or wiser couples, can never be conquered: And neither the angles in heaven above, Nor the demons down under the sea, Can ever dissever my soul from the soul Of the beautiful Annabel Lee. (lines 33-36) The poem's diction immerses the reader into the speaker's fantasy-like realm of love shared with his bride. He begins the poem with the first two lines, "It was many and many a year ago, / In a kingdom by the sea," much like the "once upon a time, in a faraway land" of fairytales. The couple lived with no other thought than to love one another and "loved with a love that was more than love" (9).

Doubt in To The Lighthouse: Virginia Woolf’s Use of Symbolism and Tone

Virginia Woolf’s use of several literary devices, most especially tone and symbolism, can be seen in To The Lighthouse by dissecting important passages and analyzing how certain phrases connect with the work as a whole by enhancing the overall theme. The passage that Woolf best utilizes to convey both symbolism and tone can be found in her second chapter of the final section. Here she says, â€Å"He must have had his doubts about that table, she supposed; whether the table was a real table; whether it was worth the time he gave to it; whether he was able after all to find it. He had had doubt, she felt, or he would have asked less of people† (155). It is interesting to note that the theme of doubt and the subjectivity of feelings as they relate to material and nonmaterial objects continues throughout the text and the previous passage highlights this along with Woolf’s literary techniques by using the table as a symbol and the tone of introspection and guessing. This work is especially important and significant as a work of literature due to these important aspects used throughout. The previous passage should be understood in context with the events and the characters that are involved. Mr. Ramsey is a central figure of the piece, who serves as the host along with his wife of many guests to their summer house. His troubled marriage and his own doubts about his perception of how his life really is in contrast to how others may see it. His appraisal of the table, therefore, confuses one of his guests, Lily who is an aspiring artist or more specifically a painter. It is her voice in the passage that conveys the tone of the novel and that is one of subjectivity and the illusion that one person can understand another. Mr. Ramsey, on the other hand, helps to support the symbolism in this passage by simply using the table as a type of symbol to what constitutes what is important or beautiful in life as compared to what may be seen by others as unimportant or plain. The fact that the table is a solid object is also interesting in that this implies that even solid objects can be viewed differently by different people and it is not only relationships and all in life that is not static that is subject to deep thought and contemplation. While Lily contemplates that Mr. Ramsey has doubts about the reality of the table and believes that his doubts give way to his continual demands from others, it may be quite the opposite. Mr. Ramsey as the head of the household and the central figure and host of many dinner parties may see the table as the place where he is most comfortable and in charge of others, rather than in doubt of himself. Since the reader is only getting the point of view from Lily, Mr. Ramsey’s appraisal of the importance of or even the reality of the table is myopic. This ties in with the theme of doubt and the subjectivity of constructed reality that changes from individual to individual that permeates the passage, the chapter, and the novel as a whole. Lily, herself as an artist, presents her views from the eyes of an aesthetic and she has been influenced by this time by the late Mrs. Ramsey. But the philosophical ponderings of Mr. Ramsey among other events have given her doubts as to her ability to create anything of real meaning in her art and in her life. The final section of the work is the most sentimental and philosophical. By the time this passage has been uttered many deaths have occurred and the bridges that separate the remaining Ramseys and Lily are becoming more pronounced. The tone that Wolff uses has, to this point, been filled with confusion and foreshadowing and there is reason to believe that consonance might be found with the family when the remaining members, Mr. Ramsey and his son and daughter, finally do set out to see the lighthouse. There is some hope that with all the confusion and altered realities of the main characters at the close of the novel, that maybe all of them will see this lighthouse in the same way. For the entirety of the text, Woolf presents her characters as only guessing about the feelings and thoughts of others by how they view static objects, like the table in the passage. In the beginning of the book, the subject of the table comes up in terms of philosophy when Lily asks to have explained Mr. Ramsey’s thoughts on philosophy by his son Andrew. ‘Subject and object are the nature of reality’, Andrew had said. And when she said Heavens, she had no notion what that meant. ‘Think of a kitchen table then’, he told her, ‘when you’re not there’† (23). The fact that there are many missing people from the table towards the piece’s ending is what fashions the interactions between the characters to make meaning of their existence and to w eave all of this together with the subjective realities that each character has toward both the living and the deceased. This illustrates Woolf’s theme and her intentions for her audience to understand how the table is tied into the philosophy of Mr. Ramsey, who has become worn and saddened over the years, just as the table has been worn by time. As well, this illustrates Woolf’s use of the character Lily as a person, who is able to create objects that are new and subject to a redeeming action if her art is viewed by others to be important. As well, even if her art cannot save or redeem others in the end, she can by her own subjective reality, redeem herself in a deep and lasting fashion by discarding her doubts about herself. Certainly, Mr. Ramsey, Andrew and Cam all have doubts about the strength of their relationship and the value that is placed on visiting the lighthouse. What comes to be on this trip is not a singularity of vision between the Ramseys and Lily, but instead warmer feelings toward one another and the final realization that the only thing that can be shared is solitude. That dream of sharing, completing, of finding in solitude on the beach an answer, was then but a reflection in a mirror, and the mirror itself was but the surface glassiness which forms in quiescence when the nobler powers sleep beneath† (134). To be truly noble then, Wolff suggests that this singular vision without doubt or regret that each man or woman has is not something that can be shared, but instead it is to know that every one is alone is their vision for perfection within themselves and others. Everything else is subject to change or even the static objects like the table can be viewed differently, only we can know what we want and how casting off doubts imposed by others is what can essentially set us free. Woolf effectively utilizes the table as a symbol for the static in the world that can be seen as beautiful or ugly just as she uses objects like the mirror as a metaphor for solitude. The lighthouse, as well, is a beacon of light in the darkness, a darkness that is felt in loneliness. However, it is discovered by Lily that loneliness is noble when accepting it and discarding doubts about what is underneath the subjective surface of all things. Woolf’s introspective tone, used especially by Lily and the overall them of doubt and confusion in a world filled with change, both in the passing of time and even in the moments shared with others that may have different views illustrate how not even time changes the nature of the soul of men or women.

Selections from Annie John

The passage entitled â€Å"Selections from Annie John† was written by Jamaica Kincaid. In this extract it tells of the life of a young girl and her relationship with her mother. It begins with her stating clearly how being with her mother was an important part of her life. This was followed by narrating the things they did together. She would help her admirable mother to cook and clean. She then goes into detail of what and how things were done in regards to helping her mother with the cooking and cleaning. In the following paragraph she vividly describes her mother and briefly mentions her father. As the narrator is with her mother she tells of how they would spend time by her mother telling her stories of her past. During this past time is where the daughter showed her mother the most affection by leaning on her mother and sniffing her and gazing at her mothers’ beauty. She truly loved her mother for all that she was. As the excerpt progresses the narrator becomes a little older and goes through puberty. During this stage she begins to see new sides of her mother and herself; which, to the narrator were not good sides at all. She didn’t recognize the response she got from her mother as the same woman she grew up loving. Ultimately one day she was confronted by her mother one day coming home late from school. She tried to lie and her mother knew the truth and exposed it. Vicious words were exchanged and in the end this love she had for her mother as a youth has slowly been deteriorated. Her mother ends her rebellious thoughts with a comment that makes the narrator go deep into thought and realises that there is going to be a gap between her and her mother after this day. This extract is a very good example of difficult it is to maintain relationships with parents. I clearly agree with Kincaid’s idea. Her idea shows how easy it is to admire and have good relationship with your parents for years and how one moment can destroy all that was built. All forms of admiration you can have are presented in the passage. The description of the bond between the persona and the mother seems to be unbreakable. How Kincaid presents the theme is very effective. Who would have thought after all the praise of her mother and time with her it would end in that way. It was a shocker. It allowed me to feel bad for the young girl. This also shows how a young person’s disrespect to a parent can negatively impact the way the parent looks at the child. When the daughter said â€Å" well like father like son. Like mother like daughter. † If it wasn’t for that act of disrespect her mother would have probably scolded her and tell her how to do right. After that if I was a parent I wouldn’t even care about helping that child anymore. A lot of young people who are going through puberty think they have already â€Å"made it† and become very disrespectful at times. This can be seen in any teen. I can say this because I was the same way. For every negative comment towards me, was a response to justify or nullify what was said. It’s normal for teens to be rebellious during this maturity stage. This was another bonus for Kincaid to have me on her side. This situation more than likely happens every day. It’s real. On the other hand it also shows how each one of us will mature and we will be treated differently. Not only Kincaid’s passage shows the difficulty in maintaining relationships with parents but it is also an eye opener to young adults as to why we were treated like that at our age. We must learn that as we get older we change and we must act accordingly. This is another serious factor that Kincaid presents. The changes in youth during their adolescence age when these changes occur to the body are quite serious for young children. They don’t know what to do or how to treat these changes. I am fortunate enough to be a boy so my changes weren’t anything too drastic to get help with. However for young girls they have to worry about a lot and as Kincaid present this it is an issue I think is very important for girls to be taught to expect and treat with care. This may also be a reason as to why the subject of Kincaid passage acted in such a manner. Over all the issue kincaids passage presents are all relevant and informative if you read to take what is occurring into consideration.

woodstock b+ essays

woodstock b+ essays To some, the 60s were a decade of discovery as Americans first journeyed to the moon. Others remember the time as a decade of Americas moral decline with the invention of rock and roll and its representation of "sinful", inappropriate ideals. Yet for many people, the 60s symbolized a decade of love and harmony. Hippies exemplified these beliefs, and in 1969 they gathered at a music festival known as Woodstock to celebrate their music, their love, and their freedom in a concert that has remained one of the most influential events of the 60s. Police on the highways had seen the biggest traffic jam in the history of road life. The highway leading to Bethel New York was stopped by Hippies parking their vans near the farm. The hippies had to walk some twenty miles from the congested roads to their camping spot. Woodstock 1969 started out with many things going on in the world at the time. Woodstock was made to actually have young teens come to northern New York to rebel from war and celebrate that the Vietnam War was over and that they wanted it to stay that way. The teens and kids that came were either rebels or hippies. The main inventors of Woodstock 1969 were John Roberts, Joel Rosenman, Artie Kornfeld and Michael Lang. These men were blended by the urge to make Woodstock 1969 happen and they each had a different skill. Roberts was known for the money, Lang had concert experience, Kornfeild had the power of persuasion, and Rosenman had the will to spread the news. These men met by being friends and Lang met with the other people by having them at his other concerts. These men had found a place to have Woodstock. The men then reconsidered because of the fact that it was just not what they were looking for. They then found a pasture called Yasgur Farms. They thought it would be perfect. It didnt have any of the needs of the common man such as indoor plumbing and a minimum amou...

What is an Ellipsis

What is an Ellipsis What Is an Ellipsis? Ellipses are punctuation marks that are useful in academic writing, where there is sometimes a need to quote sources at length. This is because ellipses indicate when something has been left out from a quote, helping you to express yourself succinctly. Despite this important role, many people are unsure about how and when to use ellipses. As such, we’ve prepared this guide on how to quote elliptically. Overview: What Is an Ellipsis? As mentioned above, an ellipsis is a punctuation mark indicating an omission from a quotation, typically presented as a set of three periods ( †¦ ). An ellipsis can thus be used to emphasize important points when quoting lengthy passages by omitting excess detail: The popularity of the owl †¦ stems from its design for coping with, and hunting in, the darkness. Enormous frontal eyes stare out from cheek-like facial discs, and they have †¦ highly developed ears: Both are part of the owl’s equipment for homing in on elusive and alert prey. In the above passage, additional details have been removed to focus on two features (â€Å"enormous frontal eyes† and â€Å"highly developed ears†). It is important, however, that the amended text still makes a complete sentence, so read it back to yourself after making any omissions. Presentation The most common version of an ellipsis is the one used in the above passage (i.e., three dots with a space before and after the ellipsis). However, conventions differ depending on the style guide used, so remember to check whether your school specifies a style. Variations you may see include: Three dots with no spaces on either side (e.g., There is something†¦missing here.) Three dots with spaces between them (e.g., There is something . . . missing here.) Three dots enclosed within square brackets (e.g., There is something [†¦] missing here.) Usually, as long as you use a clear and consistent style, the type of ellipses you use will not be a major issue. Informal Writing You may also see ellipses in less formal writing, where they are often used†¦ wait for it†¦ to indicate a dramatic or comic pause! In these cases there will sometimes be no space before the ellipsis. However, there is usually a space afterwards to indicate the end of the pause. Alternatively, if used at the end of a sentence, an ellipsis can indicate a thought or utterance trailing away to nothing without a satisfying†¦