Generally, you can't. Each network card has it's own unique physical MAC address imprinted on it by the manufacturer (kind of like a fingerprint or Social Security number). Although, many types of ethernet cards available today support changing the MAC address assigned to the card. The address is how a network device recognizes 'your' machine. When you log-on, a DHCP server assigns your MAC an IP address. It's not going to assign 2 IP's to the same MAC address (though on many OSs you can do this yourself).
You can, however, assign a 'static' (unchanging) IP to your machine. I suppose you could change between two IP's. Static IP's are normally for businesses that own their own server (and the IP ranges assigned to it). Your normal ISP won't allow you static IPs without a formal request.
you can however have two cards with the same ip
you can assign two ip addresses to a single interface in a Linux OS, no idea of Win 98 though.
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[As mentioned above, multiple IP addresses may be assigned to a single interface in a Unix or Linux operating system (I have machines with a dozen or more IP addresses assigned to a single physical network interface), however I'm not sure such "virtual or aliased interfaces" can be created in Windows 98.
This is useful on Linux machine so that each different "virtual" IP address can be assigned a unique DNS name and accessed by that DNS name, even though, in reality, the client machine is actually just talking to the same server that is hosting dozens or thousands of other web sites under other domain names. I really don't know anything about Windows whatever, I haven't used a Windows machine since Windows 95 and I very seldom even turned that machine on. Linux worked for me then and it works for me now. *Shrug*
We can not provide the one MAC address to two PC. It is used only for the one PC per IP address.
This is a restriction with Windows98, unless you can find "special" drivers for certain network cards. WindowsXP, as well as Linux, has these facilities built in.
edit:the MAC address is unique to every network device and set at the time of manufacture.
The benefit would be to automatically assign network addresses to clients that need them to work on a local area network. Without DHCP you would have to assign each device an address, subnet mask, and default gateway, plus DNS and WINS server addresses, which can be time consuming and error prone. With DHCP, most of those problems disappear.
What is one purpose of using logical addresses in an IP network?
bridge filters router directs
Put the NIC in the PC, and install the NIC's drivers. Configure the NIC using Windows, so that it has the appropriate addresses on the network and the correct network protocols. Test the NIC to verify that the PC can access resources on the network.
•If the hosts on a network using private IP addresses need to access the Internet, a problem arises because the private IP addresses are not allowed on the Internet. •The solution is to use NAT (Network Address Translation), which uses a single public IP address to access the Internet on behalf of all hosts on the network using other IP addresses.
Try to assign static IP addresses to servers?
Internal addresses are hidden from external networks A company needs fewer registered IP addresses to access the Internet
Since you didn't state what operating system you are using, I will offer Windows XP/Vista answers. No. Not with standard software. You can, however, define more than one static IP address (and subnet) for a single NIC. The addresses can be on the same or different network segments depending on what you need. This is most commonly done to allow different services on a single computer to use different IP addresses so they can be easily moved to separate computers when necessary.
In order to do it you have use either two network cards (wireless + LAN, or two LANs, or two wireless cards) or you can use software such as WMWare to create a virtual PC (using setting you can get one more and even more ip addresses for only one existing in real life computer).
Routers don't use MAC addresses for routing. They use IP address.
If you are using a DHCP server, you are basically safe. It's a good practice to release all ip addresses after certain time especially if you have temporary computer in the network.
In OSPF, interfaces can be assigned to different areas. Many times, a router will be routing inside of a major network, but different interfaces will belong to different areas. You need the level of control given by wildcard masks to assign different interfaces to their appropriate areas, and not restrict an entire major network to be in one area.