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At my current place of employment, on my Windows box, when I do an ipconfig /all from my command prompt I see that I have both a static IP address as well as a dynamic IP address. Why could that be? I am trying to diagram our network structure for a new software project that I'm on...knowing the answer to this question could help out a lot.
You have multiple NICs and are multi-homed?
These are from different interfaces. You could be on a VPN, have a wireless connection, or have 2 network cards.
One possible reason is if you need to have multiple host names/IPs for a computer with a single NIC. See this link for more information. Personally I can't see why this would be necessary, but it seems that Windows does provide a means to do it anyways.
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When you configurate some interface for a device using 'ifconfig eth0 xxx.xxx.xxx.xxx up' what's the difference bettween using IP like '192.168.0.2' and '192.168.0.2/30'.
I understand the idea of a submask and that it's good use for redirect datagrams only taking part of the IP address but I dont get why using it when assinging the IP for some interface.
I found out that using the submask when for assigning the IP address establish the range for the broadcast direction.
So using direction like '192.168.0.2' will establish broadcast on '192.168.0.255' but using '192.168.0.2/30' will use '192.168.0.3' since its the last avaible direction when you taking the first 30 bits.
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I have mounted two ethernet adapter on my pc and each of them has connected to a seperate network. The problem is that only one of them is active at a same time. In other verb I can ping only through one of them at the same time and if l want to ping another network l should disable the first adapter. So now l want to know how can I use both of them same time.
Avoid assigning multiple adapters in the same computer to the same subnet.When configuring multiple NICs, each NIC should communicate with a different subnet. Configuring two or more NICs on the same subnet may cause communication problems. Delve deeper in this article. There're also example scenarios using two adapters
Also you just can assign 192.168.0.16 to the first adapter, and 192.168.1.16 to another
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What solution do you think of following situation :-
Switch X, is connected to router A and router B. Where both routers are for internet connection.
Router A has DHCP running and have ip on lan 192.168.1.1/24.
Router B has DHCP running and have ip on lan 192.168.100.1/24.
Though these two are on same physical network, but logically are on different LANs.
Now let's call these LAN-1 and LAN-2 respectively.
How can one computer on LAN-1 connect to other computer on LAN-2.
You have to provide routing from LAN-1 to LAN-2 for interconnecting 2 networks.
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MAC address are used for uniquely identifying my computer.
IP address are used for routing the packets to the network, as it has got a hierarchial structure, but it doesn't uniquely identifies a computer. So, after IPv6, each computer will have a unique IP address, so will there be any need of MAC address then?
Please do correct me, if I had understood something wrong.
No. MAC addresses operate at layer 2 ("data link layer"). The Internet Protocol (both IPv4 and IPv6) operates at layer 3 ("network layer").
These two layers are complimentary, and do not "replace" each other. For more information, read up on the TCP/IP suite.
IPv6 stateless address autoconfiguration (SLAAC) uses the MAC address to generate the address, but that does not mean they "replace" each other. It's simply a characteristic of the layer 2 interface being inherited by the layer 3 addressing. Other than that, completely complimentary.
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How to find the software used by the port 80 in windows?
If you are looking for something as simple as knowing if a program is using a particular port on your computer, you can use the command netstat -b -a on Windows. If netstat is not enough, use TCPView
You may need some network analysis tools. It is fairly common to use a tool (or combination of tools) that perform port scanning as well as packet sniffing. By analyzing the packets, you can determine what is being communicated.
EDIT: Possible duplicates:
How can you find out which process is listening on a port on Windows?
What port is a given program using?