Describe the functionality of lan, man, and wan networks. A printable version of local area network design is available. Hub or repeater a hub concentrator is a device that repeats the signals it receives on one port to all other ports. Multiple choice questions of computer networking 11 computer network is a. Smu cse 53447344 3 lan protocols basics ieee 802 reference model logical link lontrol llc. Local area network design wikibooks, open books for an. Network repeaters are small devices that receive and retransmit incoming electrical, wireless, and optical signals. Computer networking book rutgers university, electrical.
They help bring a signal to spots where ethernet and wifi data transmissions, which can span only limited distances before the signal quality degrades, cant reach. Protocol layering d needed because communication is complex d intended primarily for protocol designers. As you might recall, collisions occur on ethernet networks when two devices attempt to transmit at exactly the same time. Smu cse 53447344 2 topics lan protocols hubs repeaters bridges routers. Bridges and switches reduce the number of collision on the network by breaking the network into. A bridge is an electronic device that connects two lan segments. Search the worlds most comprehensive index of fulltext books. Introduction to wireless communications and networks. This limits the number of times a wayward packet can be forwarded to the initial ttl value, typically 64. A network refers to two or more connected computers that. Often located atop a tall building or high mountain, vhf and uhf repeaters greatly extend the operating range of amateurs using mobile and handheld transceivers. A repeater receives a signal and retransmits it, usually with higher power and from a better location, to provide a greater communications range.
Amateur radio repeater database for ham repeaters in the us, canada, and mexico. How to connect two routers on one home network using. Pdf this paper analyzes the microwave network design which uses the backto back passive repeaters with the existence of interference. A bridge switches packets at osi layer 2 data link layer. Amateur radios most comprehensive, worldwide, free repeater directory. Most of the repeaters on a network produce noise on the wire and increase the possibility of packet collisions. Pdf comparison of rfrepeater efficiency in macrocellular. Routers and repeaters are simply network devices that aid in the. Macario balston, cellular radio book systems, artech house. All amateur radiorelated projects, tips, tricks, and tools. Repeater does not separate the device in the collision domain. It is a central connection point for several network devices. North american amateur radio repeaters, including the usa and its territories, canada, and. The viability of regenerative repeaters is the main reason for the superiority of digital systems over analog ones.
First, by creating a direct path between two devices and controlling their communication, it can greatly reduce the number of collisions on the network. You can help keep repeaterbook alive by offering a small donation through paypal, a secure way to donate. Encouraging and supporting overtheair repeater use. Repeaters are network devices operating at physical layer of the osi model that amplify or regenerate an incoming signal before retransmitting. Repeaters, hubs, bridges, and routers class 5 lan extension and switching. Fundamentals of computer networking and internetworking. In a radio network utilizing repeaters, a pl tone assigned to each repeater. Pdf analysis of microwave network design using backto back.