Newbie in Networking - Can you help me!

Discussion in 'Home Networking' started by Sacha Demonthy, Jul 20, 2003.

  1. Hi,

    I am completely new in networking, so I have some questions which may
    sound childish for you.
    What are the exact differences between Hub/Switch/Router?
    What is the exact fonction of a Server?
    Can I connect my Cable Modem directly to the hub or do I
    have to connect it to one main machine which is connected to the hub and
    access it through this Computer?
    How do I setup a Linux computer in a Windows network.

    Thanks a lot for every answer!
     
    Sacha Demonthy, Jul 20, 2003
    #1
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  2. Sacha Demonthy

    Rob Morley Guest

    A basic ethernet hub repeats whatever it receives on one port to all the
    ports, so it's just a way of connecting several ethernet devices
    together. Whenever one device transmits a packet it is relayed to all
    the devices regardless of whether it's for them or not. A switch is a
    hub that remembers which devices are connected to which ports, so it can
    send the data only where it's needed, rather than repeating it on all
    ports. An advantage of this is that there are fewer collisions (when
    more than one device sends a packet at the same time, and they have to
    back off and try again) because the packets are only going where they
    need to, so a switched network will tend to perform better under high
    load than an unswitched hub. It also allows duplex communication, where
    each device can be sending and receiving data at the same time, because
    the switch will be able to separate them, effectively doubling the
    available bandwidth if traffic flow is symmetrical. But the switching
    only occurs at the MAC (Medium Access Control) layer of the protocol, so
    can only deal with a single network. A router understands IP (Internet
    Protocol), so can tell if a packet should go to another network or stay
    on the local one - it can also tell if a packet from another network
    should be allowed to cross into the local network, and offers varying
    degrees of configurability in setting rules to control this.
    To provide a service to a client - it may refer to either hardware or
    software. Take HTTP as an example: your browser (the client) connects
    to a server and asks for a web page, the server sends the page to the
    browser, and the browser displays the HTML in readable form.
    On a LAN you may have one machine designated as a fileserver - that
    means that you can connect to it in order to store or retrieve files
    across the network.
    A hub isn't smart enough to do this - you need something that
    understands IP routing, so either a hardware router or routing software
    like Windows ICS (Internet connection Sharing). You can get routers
    that include ethernet switches, and that's probably the neatest
    solution.
    Set up for what? You can share Windows files using SAMBA, a cross-
    platform Open Source package for dealing with Server Message Block
    Protocol which is what Windows file and print sharing uses.
     
    Rob Morley, Jul 20, 2003
    #2
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