Network Topology

Apr 30th, 2015
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There are three primary types of network topologies, which refer to the physical and logical layout of the network cabling. They are the bus, star and ring. Bus and star are the most widely used for Ethernet networks and ring is used for token ring networks. The topology is the networks virtual shape or structure. The shape, ring, bus or star, does not necessarily correspond to the actual physical layout of the devices.

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Network Topologyfrom node to node, with each node handling every message.Because a ring topology provides only one pathway between any two nodes, ring networks may be disrupted by the failure of a single link. A node failure or cable break might isolate every node attached to the ring. FDDI networks overcome this vulnerability by sending data on a clockwise and a counterclockwise ring: in the event of a break data is wrapped back onto the complementary ring before it reaches the end of the cable, maintaining a path to every node along the resulting "C-Ring". 802.5 networks -- also known as IBM Token Ring networks -- avoid the weakness of a ring topology altogether: they actually use a star topology at the physical layer and an MAU to imitate a ring at the datalink layer.A bus network Topology is a network architecture in which a set of clients are connected via a shared communications line, called a bus. There are several common instances of the bus architecture, including one in the motherboard of most computers, and those in some versions of Ethernet networks.Bus networks are the simplest way to connect multiple clients, but often have problems when two clients want to

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