Router vs Switch vs Hub with switch

Discussion in 'Hardware' started by eXtenzz, Jan 25, 2006.

  1. eXtenzz

    eXtenzz Private E-2

    1.Connecting two Pc's to a 100 Mbps Router, both Pc's will have a maximum traffic speed of 50 Mbps. Correct?
    2.Connecting the same Pc's to a 100 Mbps Switch, both Pc's will have a maximum traffic speed of 100 Mbps. Correct?
    3.If you connect the same Pc's to a 100 Mbps Router with built in Switch, what will be the maximum traffic speed on both Pc's?
    4.Is a router the same as a hub?
     
  2. foogoo

    foogoo Major "foogoo" Geek

    "collision domain is a group of Ethernet or fast Ethernet devices that are directly connected by repeaters or hubs. At any time only one node/device may transmit inside of this collision domain. Repeaters and hubs are physical layer devices and do not understand Ethernet frames or protocols. Their role is to simply extend distance and to facilitate star topology. All nodes/devices that share an Ethernet or fast Ethernet LAN using the CSMA/CD rules are part of the same collision domain or, in other words, all the nodes/devices that are connected to a hub are part of the same collision domain. So, when a collision occurs in a collision domain, everyone in that domain gets affected.
    A switch on the other hand is not a repeater but actually a bridge, which acts upon the content of the Ethernet frame it receives and forwards the frame to the appropriate port on the switch. Switches break the network into multiple collision domains and hence simplify the expansion rules by avoiding the collision domain restrictions."

    Basically a switch cuts down on traffic - hub are 'dumb' devices - unmanaged. The switch forwards traffic instead of broadcasting it - cutting down on collisions.

    "A router determines the next network point to which a packet should be forwarded toward its destination. The router is connected to at least two networks and decides which way to send each information packet based on its current understanding of the state of the networks it is connected to. A router is located at any gateway (where one network meets another), including each point-of-presence on the Internet. "

    The easiest way my teacher explained it is "routers define networks".

    So if your router has a switch built in your PCs will get the full bandwidth.
     
  3. Adrynalyne

    Adrynalyne Guest

    1.Connecting two Pc's to a 100 Mbps Router, both Pc's will have a maximum traffic speed of 50 Mbps. Correct? No. They will have a maximum throughput of 100Mbps. Each port has dedicated bandwidth.

    2.Connecting the same Pc's to a 100 Mbps Switch, both Pc's will have a maximum traffic speed of 100 Mbps. Correct? Yes.

    3.If you connect the same Pc's to a 100 Mbps Router with built in Switch, what will be the maximum traffic speed on both Pc's? Most(if not all) routers on the market have built in switches. Incidentally, 99% of the people out there don't use routers as routers, but they use them as switches with DHCP.


    4.Is a router the same as a hub?

    No. A passive hub basically passes the data onto other machines. An active hub will actually amplify the signal as it passes through.

    Most hubs these days have switches built in.
     
  4. cat5e

    cat5e MajorGeek

    First terms.

    A Router has nothing to do with a Switch or a Hub.

    Cable/DSL Routers are a combo unit that Routes the Internet and includes four port switch. If you plug the computer to a Router, you actually plug them to a Switch. The Router function is inside between the Modem and the Switch.

    While most of the notions about the theory concerning Hubs and Switches as mention above are correct, they functionally apply to large Heavy traffic Network.

    You would not find any difference what so ever between a hub and a switch on a Network that comprised of less than 10 computers.

    :D
     

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