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what does the uplink port work for?

Posted on 2002-07-06
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Last Modified: 2010-04-17
i am using swith linksys 10\100 5 port switch(ezxs55w)
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Question by:phiton
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Expert Comment

by:lrmoore
ID: 7133759
An uplink port is used to connect your switch to another switch or hub.
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Author Comment

by:phiton
ID: 7133764
can i connect my cable modem to the uplink port? and the other port connect to the other three pc?
if not, why?
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Expert Comment

by:lrmoore
ID: 7133824
Not unless you are paying for multiple IP addresses. You would need a router. Linksys makes a good dsl/cable router with built in 4 port switch. It has a WAN port where you plug in your cable modem.
Problem is, you cable provider is only going to recognize one MAC address and assign only one IP address.
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Author Comment

by:phiton
ID: 7133829
i think i only have on IP address..
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Author Comment

by:phiton
ID: 7133830
can i ask you another question, i ping my pc name
i find a IP 192.168.0.1, is that the IP for my Pc??
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Author Comment

by:phiton
ID: 7133834
if i am not wrong, each network card has one MAC address, does that mean if i change my NIC, the IP for my PC will changed again?
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Expert Comment

by:lrmoore
ID: 7134031
Do you have more than one Network card in your PC?
192.168.0.1 is the default IP address given to a PC running Internet Connection Sharing.
Yes, each NIC has a unique MAC address. If you change your NIC, you may have to call the cable company and give them the new MAC address. If you had a linksys router instead of the switch, then you can assign that same MAC address to the router using MAC spoofing, so that you can change all the NIC's on your LAN that you want to.

If you go to a command prompt and type:
C:\ipconfig /all

Can you post the results?
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Author Comment

by:phiton
ID: 7136931
       Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Realtek RTL8139(A) PCI Fast Ethe
 Adapter
        Physical Address. . . . . . . . . : 00-C0-DF-25-6F-66
        DHCP Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 202.156.202.35
        Subnet Mask . . . . . . . . . . . : 255.255.252.0
        Default Gateway . . . . . . . . . : 202.156.200.1
        DHCP Server . . . . . . . . . . . : 172.20.3.11
        DNS Servers . . . . . . . . . . . : 202.156.1.58
                                            202.156.1.68
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Author Comment

by:phiton
ID: 7136933
yes, i have two NIC cards in my pc..
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lrmoore earned 50 total points
ID: 7137596
Your cable modem needs to stay plugged into your PC where it is. Your other PC's, and the 2nd NIC in yours should all plug into the switch. The other PC's should also have ip addresses 192.168.0.x and their default gateway should be you @ 192.168.0.1.

Here's a handy link with LOTS of information/how-to's

http://www.practicallynetworked.com/sharing/

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