LAN - Science topic

Manula Manjitha Restarting a router, also known as the good old "turn it off and on again" method, is a surprisingly effective fix for several common network issues. Here's when you might want to give it a try:

Slow Internet Speeds: If your internet feels like it's moving at a snail's pace, a quick router restart can often kick things back into high gear.

Intermittent Connectivity: If you're losing connection every now and then, a restart can help reset the connection and might solve the issue.

Device Connectivity Problems: Sometimes specific devices struggle to connect to the network. Restarting the router can help clear any minor glitches causing this.

After a Network Change: Made any changes to your network settings? A restart helps ensure all changes are correctly applied.

Overheating: Routers can get tired too, especially if they're on 24/7. Restarting can give it a little breather and cool things down.

To identify these issues, keep an eye on your internet speed, check if your device keeps losing the Wi-Fi signal, or if a particular device can't connect. Also, if your router feels hot to the touch, it might need a quick break.

Hello Shradheya Raj Rajeshwar Gupta and Vivi Richard , I am also facing the same problem. The only solution I found so far is to use a job scheduler like SLURM, But, currently I am facing problem in correctly installing it. Have you find any solution overcome this without use of a Job scheduler?

Please suggest.

Thanks

First when we talk about VLAN hoping, you must know that it s related to L2 (switch) ... router or Layer 3 switch will be used just in normal communication scenario (that is not related to hopping). Your first task is to "convince" L2 switch that you are device capable to create trunk (sending BPDU) based on DTP protocol (I am familiar with cisco equipment) and to establish trunk. Trunk means that through trunk link switch will send data from every VLAN to you :). So Da should create trafic to Db in a way to perform tagging with VLAN ID where Db belongs. This frame will be send through trunk. Frame will arive to second switch he will read VLAN ID and pass frame to all ports that are associated with that VLAN and on all ports marked as trunk. Dd will send response, it will arive to switch. Switch will set VLAN ID (tag) to frame and forward to all ports that are associate with that VLAN and to all trunks...so response will arrive to your Db, but still there is problem if you want to communicate with Db ... why ... because Da willl detect that destination is in another subnet (same sa Db) and will set gateway MAC as destination MAC address, so Db will never process this request... there is option to send broadcast ... but this include additional modification.... so it easy to monitor traffic , but harder to communicate in common way... hope that this helped :)

Mohsen Arzani ,

A VLAN is a way to segment your network logically instead of physically. For example, in my home I have my wireless network connected to a VLAN segment made on my switch. By doing this I can route the wireless traffic (which I consider insecure and used for guests and friends) to the internet but do not allow the wireless traffic to go into my wired network (which is on another VLAN in the same switch). I also have a second wireless network which has the same rule but can also access the internal network printers through an access list in my router(also in the same switch). Note that, for the VLANs to work the switches need access lists that are provided by the router (or router/firewall).

The advantage of having this setup is that it controls the traffic any given segment sees by treating VLANs as separate entities needing a router for access. This provides security and efficiency. Also by having LANs logically segmented as VLANs can save you money since routers with many physical ports can be costly.

HTTPS://securityinstitute.com/netanalyst has retro free videos on Ethernet, Switches and Routing. The videos were part of NetAnalyst Network Forensic Certification I created and trained 50k and certified 3,500 professionals in 27 countries.

Dear Hafizur Rahman ,

Related to IoT and CC you can you can also refer to my modern paper which contains complete and detailed information:

Nidhal Kamel Taha El-Omari, “Cloud IoT as a Crucial Enabler: a Survey and Taxonomy”, Modern Applied Science, The Canadian Center of Science and Education, published by Canadian Center of Science and Education, Canada, p-ISSN: 1913-1844, e-ISSN: 1913-1852, DOI:10.5539/mas.v13n8p86, 13(8):86-149, 2019.

Or simply you can click here:

Have a look at hardkernels products. I have been using the odroid XU4 for my project work, it has 8 cores and a GPU, based on Samsungs' exynos 5422 (was in the S5 phone). Odroid do a home cloud device, 4 boards with 8 cores if you are that serious and need 32 cores!! see https://www.hardkernel.com/shop/odroid-mc1-my-cluster-one-with-32-cpu-cores-and-8gb-dram/

They also have new boards in the release path, reasonably priced!

Hi Ludwig,

Thanks very much for your input.

Yes, we did restarting computer and system many ways and reconfiguring system. It did not fix the problem. I will try your idea to see.

Thanks,

Shuguo

You can make your NI card to work under the control of a labeview application on a PC or a Lap top connected to the LAN bia an Ethernet where the server also connected to. You can develop the measurement set up to acquire an I-V curve according to specific time schedule store a copy and send it to the server for storing processing and displaying.

Best wishes

Check this thesis

If the intranet application is being hosted by a particular server and you need it for just sharing of files/pdfs/videos/etc then you can connect to the host IP and port via a network drive (using Map Network Drive).

If intranet gives all functionalities as internet, and the difference is just that the recipients are different (one is a public network and other private), then you can enable a virtual ethernet port and a virtual IP from your device (say eth 1) and you can connect to the private intranet via that port. Details of enabling a virtual port/VLAN could be searched online. If you are using a virtual port then Switch need not be needed, in case of VLAN switch would be needed

First: Google IEEE 802.11. That is the Wi-fi standard. It will anwer most of your questions.

Then: 802.11n is a more robust standard, since it uses multiple antennas.  Are you able to test your setup With 802.11n?

Regards,

Svein Johannessen

Please see some of the links that I am attaching here.

I have to ask what is the purpose for the conversion and use of an LED?  Also, there are many different flavours and speeds of Ethernet.  A 10BASE-T connection would require sa diffrerent solution from a 1 Gbps Ethetrnet connection.

Hi,

Firstly you would have to understand the data output rate available to configure the performance rate that you are looking for according to the optical fiber. I hope this helps!

Yes u can setup a grid computing env in local area network, You can have Eg: 1 head node and 2 Compute nodes. If more compute nodes are added  gromacs or NAMD, Simulation (Execution) will be faster.

With questions like this one I always advise to take a step back: What is your goal? What are the requirements on the system you're building (functionalities, number of users, performance requirements) as well as constraints (technologies available, budget, availability of a dedicated programmer) etc. Asking if you can do "it" in VB.NET is premature when you haven't even laid down what "it" is. Also, if VB.NET is available, so should be C#, and possibly other technology choices, so don't limit yourself from the outset but list the advantages and shortcomings of each of them.

Try with ntop.

What is important is future-proof solution, which might depent more on infrastructure layout than on IT components. The latter can be exchanged quite easily.

There is this CELENEC standard in Europe, which covers in-fouse wiring for these types of lokalities: residential, business, industrial zones and data centres.

It entered into force in 2011 by means of national standards and should be applied for all new houses and reconstructions of them (so called "NGA ready house").

Are you using PCap ?? there are many wrappers liberaries for PCap like JPCap (Java), SharpPCap (.Net)