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	TRAVEL TO ARIZONA Arizona had an estimated population of over 7 million. Arizona is one of the Four Corners states. It borders New Mexico, Utah, Nevada, California, touches Colorado, and has an international border with the states of Sonora and Baja California in Mexico. In addition to the Grand Canyon, many other national forests, parks, monuments, and Indian reservations are located in the state. The capital and largest city in Arizona is Phoenix. Flagstaff has a strong tourism sector, due to its proximity to Grand Canyon National Park, Sedona, and Oak Creek Canyon. Historic Route 66 is the main east-west street. Flagstaff is home to over 60,000 residents and the main campus of Northern Arizona University. Due to its numerous golf courses, Arizona is home to several stops on the PGA Tour, most notably at the FBR Open, more commonly known as the Phoenix Open. Places to Visit in Arizona: 1. The Grand Canyon is a colorful, steep-sided gorge, carved by the Colorado River, in northern Arizona. The Grand Canyon National Park is one of the seven wonders of the world and one of the first national parks in the United States. Try for an overnight stay so that you can enjoy the sunset and sunrise at the Canyon's rim! 2. Railroad through the Verde Valley and see the untouched Arizona. 3. Canyon de Chelly - A beautiful area located in the heart of the Navajo Nation. The Navajo Nation is also the gateway to Monument Valley. 4. Tombstone - the town too tough to die! Remember the scene of the gunfight at the OK corral? 5. I highly recommend visiting the Petrified Forest and the Painted Desert. Bring extra film or extra camera chips with you. 6. Jerome - the town that hangs on a hill side, barely! 7. Kartchner Caverns is Arizona's newest state park. 8. Montezuma Castle 9. Scottsdale is a popular destination for tourists as it is packed full with resorts, shopping, arts and atmosphere. 10. Coal Mine Canyon is the home of hoodoos and legends. 11. Sycamore Canyon - Shhh, it's a secret; another amazing Arizona canyon. 12. Arizona is home to one of the largest and most well-preserved meteorite impact sites in the world. The Barringer Meteorite Crater (better known simply as "Meteor Crater") is a gigantic hole in the middle of the high plains of the Colorado Plateau. The crater itself is nearly a mile wide, and 570 feet (174 m) deep! For more travel suggestions, please visit www.travelspotsintheus.com. THE INTERNET The Internet is the worldwide "network of networks" that links millions of computers together via copper wires, fiber-optic cables, wireless connections, and other telecommunications channels. It is a massive network of networks, a networking infrastructure, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. Information that travels over the Internet does so via a variety of languages known as protocols.This publicly accessible network of interconnected computer networks communicate using a set of protocols and standards, the most basic of which are TCP/IP. TCP/IP consists of the Transmission Control Protocol in conjuntion with the Internet Protocol. Other protocols such as DHCP, DNS, FTP, HTTP, IRC, MIME, POP3, SMTP, SSH, TELNET, RTP and many more help hold the whole thing together. This learning resource will look mostly at the technical aspects of the Internet, but may eventually cover social, economic, historical and other aspects. A popular way to visualize the complexity of the Internet is to see it as a stack of layers known as the OSI model, short for Open Systems Interconnection model. OSI Layers: * Layer 7: Application Layer – the main interface for the user(s) to interact with the application and therefore the network * Layer 6: Presentation Layer – transforms data to provide a standard interface for the Application layer * Layer 5: Session Layer – controls the dialogues (sessions) between computers * Layer 4: Transport Layer – provides transparent transfer of data between end users and machines * Layer 3: Network Layer – provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more networks * Layer 2: Data Link Layer – provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer * Layer 1: Physical Layer – defines all the electrical and physical specifications for devices and the communications media