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I need to connect two wired devices using wifi, since I cannot connect them directly with a wire. So on the first side I placed an access point that does also wifi and acts as a dhcp server, and the first appliance is wired connected. On the other side I guess I need at least a repeater, but that can output the signal received also to the wire. Is this possible? Which appliance do you suggest me to use?
You can use a wireless bridge or a wireless router running a custom firmware to turn it into a bridge (DD-WRT). Any cheap wireless router that supports DD-WRT or tomato will work. I've used one of these as a wireless bridge before.
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I need to findout the distance between Wifi routers and devices connected in that Wifi. The Wifi is an open wifi, so there can be n connection.
The distance have to be tracked in wifi router not the device. Is it possible to do the same? If so then how?
Can we write a program and set the custom router for the same, if so, how can we achieve it?
Thanks,
Nikhil
If the router is linux-based, you may for example develop a simple C application periodically fetching iw dev <your_wlan_interface> station dump command output. this command lists all devices currently connected to "your_wlan_interface" and contains signal strength information as well.
Converting signal strength to the distance is another task to solve and in my opinion it is quite clearly described in the link provided
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I am supposed to work on project which involves communication between 2 GSM 900A modems. The main idea is to acquire data in remote location through Arduino (Arduino Mega in my case) and transmitting the data to the Server which will be my laptop, in which that communication part i use 2 GSM 900A modems. I am new to GSM modems so could you please help me with your ideas for establishing communication between 2 modems..
I posted a blog on this topic which is given below. I think it may be helpful for you. link:http://www.jellyfishtechnologies.com/category/embedded/
GSM modems do not follow a common standard, although the command set does tend to be a superset of Hayes AT. You will need to refer to documentation and development kits for your particular devices.
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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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I have the knowledge to do subnetingmath, but I confused what device that is used to separate each subnet from other ones? who will route packets to the right subnetwork destination? If it is the router, do we need an interface per each subnetwork?
It is the router the one in charge of routing the packets to the right subnetworks. You need to assign each subnetwork to a different interface, but this does not necessarily mean physical interfaces. You can use virtual interfaces as well.
Here's a Cisco link about them:
http://www.cisco.com/en/US/docs/ios/12_4/interface/configuration/guide/inb_virt.html
If you have multiple internal subnets, the industry standard is to create sub-interfaces and encapsulate as a DOT1Q trunk between the router and the switch.
Example R1
Interfaces:
S0/0/0 - used for WAN
Fa0/1 -physical internal interface
Fa0/1.100 Data VLAN (sub-interface)
Fa0/1.200 Voice VLAN (sub-interface)
Switch. Will have VLANs 100 and 200 on it and the trunk port will be configured as encapsulation DOT1Q. With these commands.
"switchport mode trunk"
"switchport trunk encapsulation dot1q"
I have literally done this thousands of times. Don't waste money on separate router interfaces for internal subnets.
Hope this helps.
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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.