The purpose of this paper is to present the inadequacies of IPv4 and the improvements made by implementing IPv6 Essays

The purpose of this paper is to present the inadequacies of IPv4 and the improvements made by implementing IPv6 Essays The purpose of this paper is to present the inadequacies of IPv4 and the improvements made by implementing IPv6 Essay The purpose of this paper is to present the inadequacies of IPv4 and the improvements made by implementing IPv6 Essay First, I will cover IPv4. IPv4 was implemented in the late 1980s. Therefore, IPv4 is dated technology. Before the internet explosion, IPv4 was a more than adequate solution to unique internet addressing. However, as the internet grew, and as networks and IP devices expanded and became more popular, it was apparent that a new solution to internet addressing needed to be introduced. IPv4 provides an apparently finite amount of addresses. It is estimated that IPv4 will run out of unique addresses between the years 2005 and 2011, largely due to the tremendous influx of new devices and users. IPv4 is inefficient. Period. The article on zdnet.co.uk points out that the routers that comprise the internet backbone contain routing tables that maintain over 85,000 routes. This seems to be a glaring inefficiency, almost negating the purpose of routers to provide quick and efficient routes. Among other problems with IPv4, security is an issue. Though there are vendor-specific ways to encrypt data on IPv4, no real standardized solution exists. There is certainly a need for an internet standard to address this issue. With the advent of e-commerce and things of the like, security is an issue not to be taken lightly. In order for the next echelon of e-commerce to be traversed, it seems that security and efficiency issues must be resolved. IPv6 seems to be just the tool needed to breathe life back into the internet, and expand the horizons to the broader possibilities that the internet and networking in general can provide. Sounds like Im selling it to you, no? Anyway, IPv6 can bring networks back from the dead and give them new life and reassurance. First and foremost, the issue to limited addressing is eradicated with IPv6. IPv6 allows for 2128 addresses. This new 128-bit address scheme eliminates the possibility of running out of addresses, at least for quite awhile. Another cool feature of IPv6 is the ability to auto-configure IP addresses, almost eliminating the need for DHCP, because the computers will poll others around them and determine an appropriate IP address for itself. This plug n play scheme will allow for wireless devices to travel seamlessly across cells without degradation or differentiation of service, to my understanding. IPv6 also incorporates various elements of the IPv4 header into a flow label; allowing for a simpler header and less relative overhead. A diagram of this is on the last page of this essay, with its source immediately beneath. Optional components once found in the front of an IPv4 header, whether used or not, are now located in an extension header in IPv6, and are only present when used. This also reduces minimum packet size and boosts efficiency. IPv6 utilizes the hierarchical nature of the internet to its advantage. IPv6 is designed to utilize smaller routing tables, thus allowing for faster routes due to smaller search times. The routers will only be aware of other routers connected directly to them, and the IPv6 packet serves as an almost self-steering packet. Regarding security, IPv6 has IPSec encryption incorporated. This solves the problem of the lack standardized encryption and security solutions. One of the drawbacks to IPv6, however, is that it is costly to implement, though it is a worthy (and eventually required, right?) investment. During my research, I can across internet communities dedicated to IPv6 implementation who are already reaping the benefits of implementation. They seem pretty excited, too.

Vertebrates - Vertebrata - the Animal Encyclopedia

Vertebrates - Vertebrata - the Animal Encyclopedia Vertebrates (Vertebrata) are a group of chordates that includes birds, mammals, fishes,  lampreys, amphibians, and reptiles. Vertebrates have a vertebral column in which the notochord is replaced by multiple vertebrae that form a backbone. The vertebrae surround and protect a nerve cord and provide the animal with structural support.  Vertebrates have a well-developed head, a distinct brain that is protected by a skull, and paired sense organs. They also have a highly efficient respiratory system, a muscular pharynx with slits and gills (in terrestrial vertebrates the slits and gills are greatly modified), a muscularized gut, and a chambered heart. Another notable character of vertebrates is their endoskeleton. An endoskeleton is an internal assemblage of notochord, bone or cartilage that provides the animal with structural support. The endoskeleton grows as the animal grows and provides a sturdy framework to which the animals muscles are attached. The vertebral column in vertebrates is one of the groups defining characteristics. In most vertebrates, a notochord is present early in their development. The notochord is a flexible yet supportive rod that runs along the length of the body. As the animal develops, the notochord is replaced by a series of vertebrae that form the vertebral column. Basal vertebrates such as cartilaginous fishes and ray-finned fishes breath using gills. Amphibians have external gills in the larval stage of their development and (in most species) lungs as adults. Higher vertebrates- such as reptiles, birds, and mammals- have lungs instead of gills. For many years, the earliest vertebrates were thought to be the ostracoderms, a group of jawless, bottom-dwelling, filter-feeding marine animals. But during the past decade, researchers have discovered several fossil vertebrates that are older than the ostracoderms. These newly discovered specimens, which are about 530 million years old, include Myllokunmingia and Haikouichthys. These fossils exhibit numerous vertebrate traits such as a heart, paired eyes, and primitive vertebrae. The origin of jaws marked an important point in vertebrate evolution. Jaws enabled vertebrates to capture and consume larger prey than their jawless ancestors. Scientists believe that jaws arose via the modification of the first or second-gill arches. This adaptation is thought to have at first been a way of increasing gill ventilation. Later, as musculature developed and the gill arches bent forward, the structure functioned as jaws. Of all living vertebrates, only the lampreys lack jaws. Key Characteristics The key characteristics of vertebrates include: vertebral columnwell-developed headdistinct brainpaired sense organsefficient respiratory systemmuscular pharynx with slits and gillsmuscularized gutchambered heartendoskeleton Species Diversity Approximately 57,000 species.  Vertebrates account for about 3% of all known species on our planet. The other 97% of species alive today are invertebrates. Classification Vertebrates are classified within the following taxonomic hierarchy: Animals Chordates Vertebrates Vertebrates are divided into the following taxonomic groups: Bony fishes (Osteichthyes) - There are about 29,000 species of bony fishes alive today. Members of this group include ray-finned fishes and lobe-finned fishes. Bony fishes are so named because they have a skeleton made of true bone.Cartilaginous fishes (Chondricthyes) - There are about 970 species of cartilaginous fishes alive today. Members of this group include sharks, rays, skates, and chimaeras. Cartilaginous fishes have a skeleton that is made of cartilage instead of bone.Lampreys and Hagfishes (Agnatha) - There are about 40 species of lamprey alive today. Members of this group include pouched lampreys, Chilean lampreys, Australian lampreys, northern lampreys, and others. Lampreys are jawless vertebrates that have a long narrow body. They lack scales and have a sucker-like mouth.Tetrapods (Tetrapoda) - There are about 23,000 species of tetrapods alive today. Members of this group include birds, mammals, amphibians, and reptiles. Tetrapods are vertebrates with four limbs (or whos e ancestors had four limbs). References Hickman C, Roberts L, Keen S. Animal Diversity. 6th ed. New York: McGraw Hill; 2012. 479 p. Hickman C, Roberts L, Keen S, Larson A, lAnson H, Eisenhour D. Integrated Principles of Zoology 14th ed. Boston MA: McGraw-Hill; 2006. 910 p.

International Management Essay Example | Topics and Well Written Essays - 500 words

International Management - Essay Example The key opinion/position or argument of the author is that it is essential for EU to take advantage of the potential opportunities of the Southeast Asian region if they are to maintain their global trading power. Therefore EU has to strengthen its linkages with the region to counter the regionalism taking place. He argues that those firms placed within the Southeast Asian region in the form of Multinational operations, International Joint ventures and other forms of FDI, stands to gain favourably from the opportunities emerging from the regionalization process taking place in this part of the world economy. It is him opinion that by taking advantage of the simultaneous drives of these nations to attract FDI ventures that target outward bound export activities, EU firms can capitalize on these trends of regionalism. Southeast Asian region is growing at an average rate of 7.2% compared to 2.4% of EU and these growth markets offer high potential. The techno industrial capabilities of the countries in the region have developed to match those of the EU countries. Countries such as Australia and USA are benefiting form the regionalism taking place through its linkages to the region in terms of APEC and will benefit from the overlapping member relationships of APEC and ASEAN. Those EU firms that have achieved the â€Å"insider† status by locating themselves within the region has benefited by being able to compete effectively not only in the host country market but in export activities to all other nations in the region, compared to outsider firms in EU as well as other nations in pacific rim and USA. If EU firms are to take advantage of the impact of regionalism, by countering negativities and maximising opportunities, they can do so by locating themselves within the region, especially the Sub Regional Economic Zones which operate on interlinked business relationships. Although

Week 9 assignment paper Essay Example | Topics and Well Written Essays - 500 words

Week 9 assignment paper - Essay Example The public image of the company is paramount in keeping its customers and retaining its value. People arrive at the decision to purchase goods and services based on personal values. If the company projects the image consistent with public values, then sales may be expected to go up, as well as revenues and profits. This leads to a more valuable company through increased ROI for investors. However, companies negatively perceived are shunned and sales suffer. One need only look at Nike and Gap when news broke out that they outsourced products from child labor and sweat shops in Asia (Thottam, 2005). St. Jude Medical, my organization, is perceived as a reliable provider of quality medical goods, with a solid reputation in corporate responsibility. An organization with a high employee retention rate keeps its trained and skilled workers for a long time. The organization gains the benefit of their long-term experience and expertise, and avoids the cost of having to train new employees frequently. A high turnover rate reduces profitability because of the time new hires go through their learning curves, and the disruptions in the production schedule because of vacancies. Besides, one must â€Å"employ the market† to best serve the market (RBC, 2012). At SJM, employee turnover rate is low, and retention high. Of course, positive news breaks about the company are always welcome, and in the case of negative news, SJM, a Fortune 500 company, has its crisis management team to pre-empt the worst effects. The key to the crisis management plan is prompt, transparent communication with the public. SJM does not rely on PR or window dressing. Instead, its 16,000 engaged employees worldwide become the company’s spokesmen and uphold its brand name, by their own testimony and endorsement. Finally, SJM counters bad news by its good quality products. Yes, D&I practices at SJM develop a sense of community. The organization

The Ebola Virus: History, Occurrences, and Effects Essay -- Ebola Hemo

"The only sound is a choking in his throat as he continues to vomit while unconscious. Then comes a sound like a bed sheet being torn in half, which is the sound of his bowels opening at the sphincter and venting blood. The blood is mixed with his intestinal lining. He has sloughed off his gut. The lining of his intestines have come off and are being expelled along with huge amounts of blood" (Preston 17). Ebola, a virus which acquires its name from the Ebola River (located in Zaire, Africa), first emerged in September 1976, when it erupted simultaneously in 55 villages near the headwaters of the river. It seemed to come out of nowhere, and resulted in the deaths of nine out of every ten victims. Although it originated over 20 years ago, it still remains as a fear among African citizens, where the virus has reappeared occasionally in parts of the continent. In fact, and outbreak of the Ebola virus has been reported in Kampala, Uganda just recently, and is still a problem to this very day. Ebola causes severe viral hemorrhagic fevers in humans and monkeys, and has a 90 % fatality rate. Though there is no cure for the disease, researchers have found limited medical possibilities to help prevent one from catching this horrible virus. The Ebola virus can be passed from one person into another by bodily contact. Airborne transmission of Ebola has not yet been confirmed, as there is no substantial evidence of this occurring. Researchers are still to this day observing the ways of transmission of this virus from one person to the next. In previous outbreaks, this infection has often occurred among hospital care workers or family members who were caring for an ill or dead person infected with the virus. Blood and body fluids contain large amounts of virus, thus transmission of the virus has also occurred as a result of hypodermic needles being reused in the treatment of patients. Under-financed health care facilities in countries such as Zaire, Gabon, and Sudan find reusing needles a common practice. This contributes the vast amount of fatalities of this virus in these cities. The general geographic region that has been most affected by the different strains of the Ebola virus is Central Africa, namely the cities of Zaire, Sudan, and Gabon. The first known occurrence of Ebola was found in a man by the name of Charles Monet, who had currently taken a trip... ...ving things carry viruses in their cells. Even fungi and bacteria and inhabited by viruses and are occasionally destroyed by them. A virus makes copies of itself in a cell until eventually the cell gets pigged with virus and pops and the viruses spill out of the broken cell. If enough cells are destroyed, such as they do in the case of Ebola, the host dies. A virus does not "want" to kill its host. That is not in the best interest of the virus, because then the virus may also die, unless it can jump fast enough out of the dying host into a new host. Ebola Zaire, a type of strain of Ebola, attacks every organ and tissue in the human body except skeletal muscle and bone. Small blood clots begin to appear in the bloodstream. The blood then thickens and slows, and the clots fit together in a mosaic. The mosaic thickens and throws more clots and the clots drift through the bloodstream into the small capillaries, where they get stuck. This shuts off the blood supply to various parts of the body, causing dead spots to appear in the brain, liver, kidneys, lings, intestines, and all through the skin. Works Cited Preston, Richard. The Hot Zone. New York: Random, 1994.

Biome Essay

The African Savanna biome is a tropical grassland in Africa between latitude 15Â ° North and 30 degrees S and longitude 15 degrees W and 40Â ° West. It covers Guinea, Sierra Leone, Liberia, Cote D’ivore, Ghana, Togo, Benin, Nigeria, Cameroon, Central African Republic, Chad, Sudan, Ethiopia, Somalia, and the Democratic Republic of the Congo, Angola, Uganda, Rwanda, Burundi, Kenya, Tanzania, Malawi, Zambia, Zimbabwe, Mozambique, Botswana, and South Africa. Around 2 million large plant-eating mammals live in the savanna. There are 45 species of mammals, almost 500 species of birds, and 55 species of acacia in the Serengeti Plains. There are animals such as lions, African wildcats, klipspringer, steenbok, Burchell’s zebra, African Savanna monitor, and puff adders. They have the largest diversity of hoofed animals in the world including antelopes, wildebeest, buffalos, zebras, and rhinoceros. Fire, ground water, water table, soil’s moisture retention, landforms (plateau, mountain, valley) and their slope ( < 3% to > 10%), soil temperate, days of cloud cover versus days of sun for amount of sunlight and it influence, first & last frost dates for growing season. Focus on the limiting factors of the air supply, precipitation, soil types, & light.

The Aeneid, The Iliad and the Odyssey - 653 Words

Practically thousands of years after they were thought of and written, the Aeneid, The Iliad and the Odyssey continue to be three of the most renowned and broadly read stories ever told. The Aeneid is an epic poem written in 12 books and is modeled in part on the great Greek epic poems, on Homers Iliad and Odyssey. Odysseus is trying to get back to the home, Aeneas is seeking the new In the Aeneid the first six books were in correspondence to the Odyssey because they illustrated Aeneas hunt for a home. Throughout the journey Aeneas path was place in the same familiar places that Odysseus had traveled in. The essential difference between the paths was that at the same time as Odysseus was trying to return to his original home he left to go to the Trojan War years earlier, Aeneas was trying to find a place he could belong where he and his companions are intended to inhabit after the demolition of Troy. Odysseus is the conqueror in The Odyssey, and Aeneas, is he superman of The Aeneid. The two men fought the battle over Troy together but on two opposite sides. Odysseus was the ruler of Ithaca and was questionably the one of the cleverest kings of his time and warrior in all of Greece because of his resourceful Trojan horse idea he used to overcome Troy. Some would say that Odysseus and his army was losing the war up until they built the horse that they could hide in and plan a sneak attack on the Trojans. Once the horse got inside Odysseus and his men waited until theyShow MoreRelatedThe Aeneid Of The Iliad And Odyssey794 Words   |  4 Pages Virgil was Rome’s unwilling epic poet, he gave the Roman people a cohesive narrative that tied them to the past and propelled them towards the future. This narrative, The Aeneid, had its basis in local lore as well as ties to the older Greek epics of Homer. The Aeneid almost functions as an extension of The Iliad and Odyssey, with its protagonist, Aeneas, being a minor figure in the earlier poems, and the work itse lf academically divided into â€Å"Odyssean† and â€Å"Iliadic† parts. In this relationshipRead MoreComparative Analysis of the Aeneid, Odyssey, and Iliad Essay962 Words   |  4 PagesComparative Analysis of the Aeneid, Odyssey, and Iliad The Iliad and the Odyssey are two of the best Greek epics written by Homer. Despite their popularity, almost nothing is known about the author beyond the existence of his masterpieces. Surprisingly enough no concrete evidence of his existence is available; not even to confirm the same person created the two works. The authorship of the Iliad and the Odyssey were debated even in the times of the ancient Greeks. Many scholars have arguedRead MoreComparison Of Virgil s The Aeneid, The Iliad And Homer s `` The Odyssey `` Essay1155 Words   |  5 Pagespredestined and the outcome will remain the same. 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Fitzgerald (Vintage, 1990) Lectures: Tuesdays and Thursdays CLH L 11:30 a.m. – 12:30 p.m. Tutorial Sections: |Section |Time and LocationRead MoreComparing The Iliad And The Odyssey905 Words   |  4 PagesThis short essay will identify five traditional epic characteristics that are evident in both the Iliad and the Odyssey. The first epic characteristic evident in both epics is catalogs and genealogies. For instance, Book VIII of the Odyssey features a list of participants in the game (115-125) and the Iliad Book II features a catalog of ships (484-759). Secondly, both epics start in media res. The Odyssey starts ten years after the Trojan War and the Illiad starts nine years after the start of the warRead MoreThe Aeneid Essay1069 Words   |  5 PagesVirgil asked that his unfinished Aeneid be destroyed, but Augustus would not let this happen. The Aeneid was later completed by two of Virgil’s friends, that fixed the minor grammatical errors and published the poem. 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