ITteoric14.pdf

Week 14: Network  Communication system connecting two or more computers.  LAN: Local Area Network  MAN: Metropolitan Area Network  WAN: Wide Area Network 1 Network: LAN Local Area Network connects, usually by cable, a group of des...

Week 14: Network  Communication system connecting two or more computers.  LAN: Local Area Network  MAN: Metropolitan Area Network  WAN: Wide Area Network 1 Network: LAN Local Area Network connects, usually by cable, a group of desktop PCs and other devices, such as printers, in an office or a building. LAN is maintained inside a building or small campus 2 Network: MAN Metropolitan Area Network A data network intended to serve an area the size of a large city. Such networks are being implemented by innovative techniques, such as running optical fiber through subway tunnels. MAN’s connect LAN’s together within a city 3 Network: WAN  Wide Area Network A communications network that uses such devices as telephone lines, satellite dishes, or radio waves to span a larger geographic area than can be covered by a LAN. WAN’s connects LAN’s together across the country. 4 Network: Connection  1. Access device: a personal computer with a NIC(Week 6:slide 8)  2. Physical connection: Connecting to wired(cable) or wireless LAN.  For MAN, and WAN need ISP 5 Internet: Connection: ISP ISP (Internet Service Provider) - A company that connects you through your network connection to its servers. Their servers allows you to connect MAN, or WAN. WAN also connects you to the Internet if your ISP allows you to other WANs. Connecion between WANs is done by global broadband service companies. 6 Network: Connection: ISP: Internet  The Internet is the global system of interconnected computer networks.  It uses WAN to communicate between networks and devices. A visualization of a portion of the Internet 7  Bandwidth Data transmission rate- an expression of how much data can be sent through a communications channel in a given amount of time. Broadband - Very high speed bandwith connection. submarinecablemap.com 8 Network: Sevices When these devices e-Mail are connected File sharing together to form a Instant messaging network, the capabilities are Online game enhanced multiple- Printing times. Some basic File server services computer World Wide Web network can offer are. 9