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Slide 1 - The Basics of Computer Networking
Slide 2 - The Computer Network Arguably, the greatest advancement in technology and communication over the past 20 years has been the development and advancement of the computer network. From emailing a friend to on-line bill paying to downloading data off the Internet to e-commerce, networking has made our world much smaller and changed the way we communicate forever.
Slide 3 - The Computer Network What is a Computer Network net·work: [net-wurk] – noun, a system containing any combination of computers, computer terminals, printers, audio or visual display devices, or telephones interconnected by telecommunication equipment or cables: used to transmit or receive information.
Slide 4 - Navigation Links Network Diagram – Basic Layout and map of a traditional computer network. Network Types – Computer networks vary in shape and size depending on usage. - WAN - LAN - Peer to Peer Fiber Optic Cable – One of the Latest innovations in network cabling. Switches and Hubs – The central device within a network that transmit data. Servers – The central storage device for the names and locations of various data. - IP Addresses Topologies – The layouts of various network designs. - Star - Bus - Ring Firewalls – The network software that keeps destructive forces from a network. Routers – The device that let messages flow between networks. Wireless Networks - Allows computers to be moved without wires or cables. The Internet – The world’s largest network. References
Slide 5 - The Network Diagram (Click on the Words Below and Learn More About Each Component) The Internet Other LANS Firewall Router Fiber Optic Network Cable Server PC Wireless Network Wired Network Switch
Slide 6 - Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References The Three Types of Networks PEER TO PEER WIDE AREA LOCAL AREA
Slide 7 - Wide Area Network A Wide Area Network exist over a large area Data travels through telephone or cable lines Usually requires a Modem The world’s largest Wide Area Network in the Internet Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 8 - Local Area Network A Local Area Network spans a relatively small area LAN are usually confined to one building or a group of buildings Data travel between network devices via network cables. The most common type of Local Area Network is called Ethernet Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 9 - Peer to Peer Network Usually very small networks Each workstation has equivalent capabilities and responsibilities Does not require a switch or a hub. These types of networks do not perform well under heavy data loads. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 10 - Fiber Optic Cable Reduces interference in the network Transmit data faster than copper network cable Allows for more bandwidth Smaller and more fragile than copper cable Standard Network Copper Cable Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 11 - Switches and Hubs Data travels faster through switches because data is not sequenced as it is in a hub The information is more secure when it passes through a switch as opposed to a hub. Information travels more efficiently through a switch because travels directly to it’s destination as opposed to being broadcast to all PC’s on the network hub. Network Switches Network Hubs Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 12 - Servers Users are connected to certain servers which will fulfill the required request. There are 3 Principle Types of Servers Print Servers Contains the name and location of all printers that are on the Network File Servers Contain the location and names of the various drives, files, and folders on a Network Web Servers Contain the Programs, Files, and Internet Web Sites Rack of Servers Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 13 - Web Servers IP Addresses “IP” stands for Internet Protocol. IP Addresses serve as the location of websites on the Internet as well as the workstations that are connected to the web. IP addresses are made up of four sets of numbers called “Octets”. There are two types of IP Addresses: Static and Temporary. Below is a description of both. Static IP Addresses Temporary IP Addresses Static IP addresses are found only on servers and remain the same. A Domain Name Server assigns a “human readable” web address to each static IP address to make it more user friendly. Temporary IP addresses are found only on PC’s are constantly changing each time it is logged on. Temporary IP addresses are assigned by an ISP (Internet Service Provider) each time it is logged on to the Internet. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 14 - Network Topologies Network Topology refers to the shape of a network, or the network's layout. How different nodes in a network are connected to each other and how they communicate are determined by the network's topology. There are three basic topologies: Star Ring Bus Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 15 - Star Topology All devices are connected to a central hub. Nodes communicate across the network by passing data through the hub or switch. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 16 - Ring Topology All devices are connected to one another in the shape of a closed loop. Each device is connected directly to two other devices, one on either side of it. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 17 - Bus Topology T T All devices are connected to a central cable, called the bus or backbone. There are terminators at each end of the bus that stops the signal and keeps it from traveling backwards. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 18 - Firewalls A firewall is a software that can be loaded on to a network that can serve as a barrier that keeps destructive forces away from a network of computers. Packets of data are analyzed against a set of criteria or standards called filters. Filters block certain designated IP addresses. Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 19 - Routers Whether a Router is traditional or wireless, its purposes remain the same. Routers are specialized computers that send your messages and those of every other Internet user speeding to their destinations along thousands of pathways. Routers are crucial devices that let messages flow between networks, rather than within networks. Standard Router Wireless Router Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 20 - Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet Wireless Networks Allows for computers to be moved easily without having to worry about wires or cables Walkie-Talkie Network You would equip each computer with basically, a walkie-talkie. You would give each computer a way to set whether it wants to transmit or receive. A wireless network converts binary signal (0’s and 1’s) into a radio signal (series of beeps).
Slide 21 - The Internet The simplest definition of the Internet is that it's a network of computer networks Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 22 - The Internet How Information Travel Through the Internet A page on the Internet-whether it's full of words, images or both-doesn't come to you in one shipment. It's translated into digital information, chopped into 1500 byte pieces called PACKETS, and sent to you like a puzzle that needs to be reassembled. Each part of the packet has a specific function: Header Provides the complete destination address for the packet Data Block The portion of the overall information carried by the packet Sequence ID ID’s where the information belongs in relation to the rest of the information End of Message ID’s the end of the packet Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 23 - The Internet How Information Travel Through the Internet When you connect to a Web site through an ISP and start exchanging information, there isn't a fixed connection between your computer and the Web server computer hosting the Web site. Instead, information is exchanged using the best possible path at that particular time. Special computers called routers determine these paths, avoiding slow links and favoring fast ones. Your Computer ISP Routers Web Servers Navigation Network Diagram Network Types - WAN - LAN - Peer to Peer Fiber Optic Cable Switches and Hubs Servers - IP Addresses Topologies - Star - Bus - Ring Firewalls Routers Wireless Networks The Internet References
Slide 24 - References Intel Corporation, (2004). www.intel.com. Retrieved May 11, 2007, from .The Journey Inside: The Internet. website: http://www97.intel.com/discover/JourneyInside/TJI_Internet/default.aspx Webdopedia (2007). http://www.webopedia.com/. Retrieved May 11, 2007, online dictionary and search engine you need for computer and Internet technology definitions. http://www.webopedia.com/.