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	TYPES OF NETWORKS MAINFRAME Mainframe computers are typically large, metal boxed computers with large processing abilities. The terminals are called "dumb terminals" because they only send and receive data, leaving the processing to the mainframe. CLIENTS The client/server refers to the way two computer programs interact with each other. The client makes a request from the server, who then fulfills the request. Although this idea can be used on one computer it is an efficient way for a network of computers in different locations to interconnect. Local Area Network (LAN) The first LANs were created in the late 1970s. LANs are small networks constricted to a small area, like a city. LANs are used to share resources like storage, internet, et cetera. A 'node' on a LAN is a connected computer or device like a printer. Wide Area Network (WAN) WANs are very large networks that interconnect smaller LAN networks, for a large geographic area like a country (i. e., any network whose communications link crossmetropolitan, regional, or national boundaries.) WANs are usually for private companies, however, some built by internet service providers connect LANs to the internet. WAN can use a combination of satellites and microwaves, and can link a variety of computers from mainframes to terminals. A 'node' on a WAN is a LAN. Metro Area Network (MAN) Metropolitan area networks, or MANs, are large computer networks usually spanning a city. They typically use wireless infrastructure or Optical fiber connections to link their sites. When the LANs that you want to connect are not far apart, just blocks away, then you can make a MAN. The main difference between a WAN and a MAN network is the speed of the connection. Because the LANs are so close in a MAN, high speed fiberoptic cables are affordable. Campus area network (CAN) A Campus Area Network is a computer network made up of an interconnection of local area networks (LANs) within a limited geographical area. It can be considered one form of a metropolitan area network, specific to an academic setting. In the case of a university campus-based campus area network, the network is likely to link a variety of campus buildings including; academic departments, the university library and student residence halls. A campus area network is larger than a local area network but smaller than a wide area network (WAN). The main aim of a campus area network is to facilitate students accessing internet and university resources. Personal Area Network (PAN) A personal area network is a computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person. The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters. PANs can be used for communication among the personal devices themselves (intrapersonal communication), or for connecting to a higher level network and the Internet (an uplink). Home Area Network (HAN) The Home Area Network uses cable, wired, or wireless connections to connect a homes' digital devices. For example, fax machines, computers, DVD's etc. Garden Area Network (GAN) A Garden Area Network is a similar system and allows for one system to control such devices like garden lights, sprinkler systems and alarm systems. 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.