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Figure 2-12 Chained vs. end-to-end layers
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Physical
Physical Layer standards, therefore, tend to be highly commoditized, while Application Layer standards tend to be highly specialized. This becomes extremely important as the service provider model shifts from delivering commodity bandwidth to providing customized services even if they re mass customized to their customer base. Service providers are clawing their way up the OSI food chain to get as close to the Application Layer end of the model as they can because of the Willie Sutton Rule.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
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The Willie Sutton Story
2
Willie Sutton became famous in the 1930s for a series of outrageous robberies during which he managed to outwit the police at every turn. During his career he had two nicknames, The Actor and Slick Willie, because of his ingenious tendency to use a wide array of disguises during his robberies. A sucker for expensive clothes, Sutton was an immaculate dresser. Although he was a bank robber, he had the reputation of being a gentleman; in fact, people who witnessed his robberies stated he was quite polite. One teller remembers him coming into the bank dressed to the nines carrying flowers, which he presented to her in exchange for her money. Another victim said Sutton s robberies were like attending the movies, except that the usher had a gun. On February 15, 1933, Sutton and an accomplice attempted to rob the Corn Exchange Bank and Trust Company in Philadelphia, Pennsylvania. Sutton, disguised as a mailman, entered the bank early in the morning, but a suspicious passerby caused them to abort the robbery. Roughly a year later, however, on January 15, 1934, he entered the same bank through a ceiling skylight. When the guard arrived, Sutton forced him to admit the employees, whom Sutton handcuffed and locked in a small back room. Sutton also robbed a Broadway jewelry store in broad daylight, dressed as a telegraph messenger. His other disguises included a policeman, special delivery messenger, and maintenance man. Sutton was caught in June of 1931 and sentenced to 30 years in prison. He escaped on December 11, 1932 by climbing a prison wall. Two years later he was recaptured and sentenced to serve 25 to 50 years in Eastern State Penitentiary, Philadelphia, for the robbery of the Corn Exchange Bank. Sutton s career was not over yet, however. On April 3, 1945, Sutton was one of 12 convicts who escaped from Eastern State through a tunnel. He was recaptured the same day by Philadelphia police officers and sentenced to life imprisonment as a fourth-time offender. At that time he was transferred to the Philadelphia County Prison in Homesburg, Pennsylvania, to live out the rest of his days. On February 10, 1947, Sutton tired of prison life. He and several other prisoners, dressed as prison guards, carried two ladders across the prison yard to the wall shortly after dark. When the searchlights froze them in its glare, Sutton yelled, It s okay, and no one stopped him. They climbed the wall under the watchful eye of the guards and disappeared into the night.
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On March 20, 1950, Willie Sutton was added to the FBI s Ten Most Wanted List. Because of his expensive clothing habit, his photograph was given to tailors all over the country in addition to the police. On February 18, 1952, a tailor s 24-year-old son recognized Sutton on the New York subway and followed him to a local gas station. The man reported the incident to the police, who later arrested Sutton. He did not resist his arrest by New York City Police, but denied any robberies or other crimes since his 1947 escape from the Philadelphia County Prison. When he was arrested, Sutton owed one life sentence plus 105 years to the people of Pennsylvania. Because of his new transgressions (mostly making the police look remarkably incompetent), his sentence was augmented by an additional 30 years to life in New York State Prison. Shortly after his final incarceration, a young reporter was granted a rare interview with Sutton in his prison cell. When they met, Sutton shook his hand and asked, What can I do for you, young man The reporter, nervous, stammered back, M-M-Mr. Sutton, why do you rob banks Sutton sat back and replied with a smile, Because, young man, that s where the money is. That s not the end of the story, however. In 1969, the New York State Prison Authority decided that Sutton did not have to serve his entire sentence of two life sentences plus 105 years because of failing health. So, on Christmas Eve, 1969, Sutton, now 68, was released from Attica State Prison. And in 1970, Sutton did a television commercial to promote the New Britain, Connecticut, Bank and Trust Company s new photo credit card program. You have to love the little ironies in life. Sutton died in 1980 in Spring Hill, Florida, at the age of 79. So what does Willie Sutton have to do with the OSI Model and service providers Not much but his career does. Today s service providers are climbing the food chain because the money is up there with the customers. Yes, of course there is money to be made at the Physical Layer end of the model, but the sustainable, growable revenues are up where services can be customized endlessly to meet the changing needs of customers. More Now About the Inner Workings of the OSI Model The functions of the model can be broken into two pieces, as illustrated by the dashed line in Figure 2-12 between layers three and four that divides the model into the chained layers and the end-to-end layers.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
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