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Describe different ways to connect to the a computer network - M1 By Ridjauhn Ryan What is a network • A computer network, or simply a network, is a collection of computers and other hardware interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network What is a LAN network • local area network (LAN) is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media. The defining characteristics of LANs, in contrast to wide area networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines. What is a WAN • A Wide Area Network (WAN) is a network that covers a broad area using private or public network transports. Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. The Internet can be considered a WAN as well What is a wireless network • Wireless network refers to any type of computer network that is not connected by cables of any kind. It is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Modem WIFI • WI-FI is a popular technology that allows an electronic device to exchange data wirelessly over a computer network, including high-speed Internet connections. However, since most modern WLANs are based on these standards, the term "Wi-Fi" is used in general English as a synonym for "WLAN". A device that can use Wi-Fi can connect to a network resource such as the Internet via a wireless network access point. Such an access point or hotspot has a range of about 20 meters or 65 feet indoors and a greater range outdoors. Satellite A satellite is an object that goes orbits a larger object, such as a planet. While there are natural satellites, like the Moon, hundreds of man-made satellites also orbit the Earth. Many satellites are battery-powered, taking advantage of the ultimate battery recharging source, the sun. Silvery solar panels are prominent features on many satellites Components of a satellite communication capabilities with earth a power source a control system to accomplish its mission Ethernet Ethernet is the most widely-installed local area network ( LAN) technology. Ethernet is a family of computer networking technologies for local area networks (LANs) The most commonly installed Ethernet systems are called 10BASE-T and provide transmission speeds up to 10 Mbps wireless • Wireless network refers to any type of computer network that is not connected by cables of any kind. Wireless is a term used to describe telecommunications in which electromagnetic waves carry the signal over part or all of the communication path. Some monitoring devices, such as intrusion alarms, employ acoustic waves at frequencies above the range of human hearing; these are also sometimes classified as wireless Bluetooth • Bluetooth is a wireless technology standard for exchanging data over short distances Bluetooth is managed by the Bluetooth Special Interest Group, which has more than 17,000 member companies in the areas of telecommunication, computing, networking, and consumer electronic. To be marketed as a Bluetooth device, it must be qualified to standards defined by the SIGs. What's the difference between LAN and WAN • The maximum speed of a LAN can be 1000 megabits per second, while the speed of a WAN can go up to 150 megabits per second. • Computers in a LAN can share a printer, if they are all in the same LAN. On the other hand, a WAN cannot share a printer, so a computer in one country cannot use a printer in another country. • WAN is more expensive than a LAN. It is easier to expand a LAN than a WAN • A LAN uses the Ethernet standard, while a WAN uses the T1 standard Wireless network pros • • • Ease of installation: Wireless networks have become commonplace with Wireless N being the current standard. While it is easy to purchase a wireless router, connect it to the Internet, and install in either a home or office setting, it is best to have a network professional install and configure the wireless router in your practice. You want to ensure that you have high security enabled and that there is sufficient wireless coverage throughout all areas within the practice. Cost: Depending on how many wireless repeaters (signal amplifiers) you have installed, the cost of hardware is generally low, although you are strongly recommended to use the services of a wireless network expert in the selection and configuration of a wireless router. Commercial routers are generally more expensive, but are more stable and offer better security controls. A $99 router from Best Buy is not advisable. Mobility: The ability to access information anywhere in your practice and not be limited to fixed stations offers significant advantages, in particular within your examination rooms where you may want to use a wireless tablet or laptop and carry it with you from room to room Wireless cons • • • Security: Wireless networks are more difficult to secure than wired local networks. As a result, they are more vulnerable to attack by unauthorized users. If improperly secured, an individual could access the network from a location near the practice using scanning software to identify available networks. All of your clinical and sensitive information could be exposed in this situation. Installation difficulties: Because wireless networks are so commonly used, you may find that other wireless networks set up in your medical building interfere with your wireless signal. There are a limited number of channels and if the incorrect channel is used, you may end up with inconsistent network connections or no network connectivity at all. Wireless transmission speeds: Wireless networks generally do not have the transmission throughput of wired local networks, as they are limited to the maximum speed of the wireless network in a specific area of the practice. As a result, many larger practices will use both a wired network as the core backbone and a wireless access in specific areas. Wired network pros • • • • Speed: With the advent of Gigabit routers, the speed of data transfer is significantly faster than wireless and not sensitive to dead spots within the practice as sometimes is encountered with wireless. Good for locations in which a lot of data is being accessed, e.g. diagnostic images or the scanning of large files. Cost: Relatively inexpensive to initially install and very low maintenance cost thereafter. The average cost for each network drop (outlet) is approximately $100; however, if a full office is being set up, this cost can be negotiated down. Wiring does not need to be replaced. As a result, long-term maintenance of the wiring is zero. However, switches and routers may need to be upgraded over time. Network security: The network must be protected by a firewall and should be set up by a professional networking expert who can ensure that the correct ports are switched on and other security features enabled. Once this is done, the network is generally well protected, particularly if it is not directly connected to the Internet. Stability: Local networks are very stable and, once correctly configured, are workhorses that do not cause many problems or require much maintenance. They are generally more stable than wireless networks, although wireless is improving all the time Wired cons • • Mobility: Once the network drops are installed, there is limited ability to move to a different location without setting up additional switches and running cables. This is relevant if you change the layout of your medical office or examination rooms and want to move computers around. Server: In very small networks, it is possible to set up a local network without a server (peer-to-peer). However, once there are more than five computers in use, it is advisable to install a high powered and high capacity server. The server stores and centralizes information across a medical office. In medical offices, due to the amount of data being moved and the need for centralized storage for documents, you should have a server. This requires ongoing maintenance and greater cost, as you will need to purchase software licenses, anti-virus software, etc. for the server and pay a qualified individual to maintain the server on your behalf.