Easy to wire quick response less expensive

This preview shows page 10 - 22 out of 86 pages.

easy to wire, quick response, less expensive Disadvantages bad connection to the cable can bring down the entire network Troubleshooting collision occurs when 2 nodes send messages simultaneously
Image of page 10
Bus Topology
Image of page 11
Star Topology Each host is connected to a central connecting device The central connecting device can be a hub, a switch, or a SOHO router This is the most commonly used topology NOTE: two star Topologies can be connected via their central connecting devices to form a star-bus topology Advantages Easy to install and wire No disruptions to the network when connecting or removing devices. Easy to detect faults and to add/remove parts. Management Disadvantages Single point of Failure, if hub, switch or concentrator fails , nodes attached are disabled. Requires more cable length than a linear topology.
Image of page 12
Star Topology In star network, each station is connected via a point-to-point link to a central point. The central point may be “passive”, “active”, or “intelligent”. A passive device simply connects the arms of a star, no signal regeneration is performed, such as wiring panels, meaning they act only as connection points and don´t regenerate the signal. An active device is like a passive hub, except that it regenerates signals. Intelligent device not only regenerate signals but also perform activities such as intelligent path selection and network management.
Image of page 13
Star Topology
Image of page 14
Star-wired Topologies Stars versus a single line Two types: 1. Star-wired bus (often call the star topology) 2. Star-wired ring
Image of page 15
Star-wired Bus Topology Logically operates as a bus, but physically looks like a star. Star design is based on hub. All workstations attach to hub. Unshielded twisted pair usually used to connect workstation to hub. Hub takes incoming signal and immediately broadcasts it out all connected links. Hubs can be interconnected to extend size of network. Very popular! Biggest disadvantage: when one station talks, everyone hears it. This is called a shared network . All devices are sharing the network medium.
Image of page 16
Star-wired bus physical topology for a LAN
Image of page 17
Interconnection of two hubs in a star-wired bus LAN
Image of page 18
Bus/Tree Topology Workstation has a network interface card (NIC) provides a physical connection to a network Attaches to the bus (a coaxial cable) via a tap. The workstation can send and receive data on the network through NIC Tap is a passive device Does not alter the signal Does not require electricity to operate Baseband signals Digital signals – 10 Mbps Bidirectional and more outward in both directions from the workstation transmitting. Easy to install and maintain Fewer than 100 workstations Buses can be split and joined, creating trees .
Image of page 19
Star & Tree Topology Larger networks use the extended star topology also called tree topology. When used with network devices that flter frames or packets, like bridges, switches, and routers, this topology signifcantly reduces the trafc on the wires by sending packets only to the wires of the destination host.
Image of page 20
Ring Topology
Image of page 21
Image of page 22

You've reached the end of your free preview.

Want to read all 86 pages?

  • Fall '19

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors