Science topics: WAN
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LoRa is a wireless technology that offers long range , low power and secure data transmission for M2M and IoT applications. But in present era of mobile 4g and 5g what may be effective applications that can be used practically.
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There are many applications of LoRa which in fact may be countless in the field of computer networks.
Please go through this link, it looks good for you.
Regards
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Hello everyone ;
Desktop computer is connected by LAN cable through Eth1 to (( core switch 10.10.2.1 , it is the gateway of my PC)) this core switch is connected to WAN network ,the WAN network has over 100 devices , normally I can ping and access any device on that WAN network ,then I had to use internet , I connected Eth2 by LAN cable to router to use internet , and this happened ,,, the internet kept disconnecting and if it stays no more than five min, anyways there is a server connected to core switch, through this server I can go WAN ,after I connected to internet the Windows forced the server to log off until I run command in CMD (route add IP mask gateway -p) I set the IP of the server as persistent route . Then Windows stopped logging the server off , and the internet became stable ,and still can not ping or access WAN , but if I disconnect the internet I can ping WAN normally .
Is it possible to go WAN or ping while my PC connected to the internet ?
Info for Eth1
PC IP 10.10.2.4
Core switch 10.10.2.1
Server 10.10.2.5
Mask 255.255.255.0
OS Windows 7
Info for Eth2
DHCP is enabled , obtain IP automatically .
Sincerely
Suhaib
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Suhaib, first thing I would suggest is, calling the internal network "WAN" is confusing. The WAN is more normally what's on the other side of the router, to the Internet. The internal network, with the server, would be called more appropriately an intranet, perhaps.
The other thing here is that all of the addresses inside your intranet are private IP addresses. And no doubt, according to your chosen IP addresses inside the intranet, the router connected to eth2 of the PC is also a NAPT - network address and port translation gateway. Not just any old router. The NAPT translates addresses, from the Internet side to the intranet side. Hosts in the Internet never see those 10.10.2.x addresses at all. This means that the easiest way for anyone inside the intranet to communicate with anyone on the Internet, is to have the host inside the intranet initiate the session.
Why? Because the IP address and TCP port, used by the host inside the intranet, becomes translated by that NAPT gateway (the router), to appear like something totally different, to devices on the Internet. From the Internet, you would see public IP addresses used, not the private ones you are actually using inside the intranet.
Under normal circumstances, as soon as the session between the host in the intranet and the host on the Internet ends, that mapping of global address/port to private address/port expires. Now you can no longer reach the host inside the intranet, from out in the Internet.
Here's what I would do. Do not connect the router to eth2 of the PC. Instead, connect the router to one of the ports of the core switch, same as the PC and all the other devices.
Then, in order to make your internal server always visible from out on the Internet, you need to manually configure the router for something called "port forwarding."
A port forward is a way of making a computer on your home or business network accessible to computers on the internet, even though they are behind a router. It is commonly used in gaming, security camera setup, voice over ip, and downloading files. After you have forwarded a port you are said to have an open port.
Having done this, you will always be able to see the intranet server from out on the Internet, and the PC will behave as almost every home PC behaves, when connected to a typical home gateway.
Best of luck.
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Any papers on the role of Intranets in managing satellite/remote campuses?
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Check the following reference Please.. it might's assist you in your question …
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The Internet of Vehicle IoV sensors generate very large amount of data that transmitted via Wireless WAN Networks and processed by cloud servers. The Quality of Service of very large volume of data sent to Cloud Servers, is often constrained by traffic congestions and delays.
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The e-Learning at many islands of South Pacific and elsewhere, is accessible only via Satellite upload and download links connecting on earth WAN, MAN and LAN computer networks infrastructures.
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Check this thesis
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What techniques can be used to speed up reliable multicasting? For example, say a sender is delivering an object reliably to 10 known and fixed receivers over WAN. What can be done to decrease average completion times?
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Mohammad, if you go through the IETF RFCs on the subject of multicast, you should find that the subject is very much discussed on fundamental principles. So for example, unicast routing protocols, whether link state or distance vector, optimize the path based on link speeds (costs). And multicast trees are built secondarily, on top of these unicast routing protocols. That's how use of optimal paths is taken into account.
There are multiple options discussed, frequently, and the best one may depend on circumstances. For instance, if there are very many members of multicast groups in a partcular network, it might make more sense to begin with an overabundance of branches in the multicast trees, and then pare these down when it is determined that some of the braches are not necessary. Conversely, if multicast members are few and far between, it might make more sense to begin with a very parsimonious set of branches, and then add on to these when the individual members remain in the group.
I don't think much of this is specific to any one protocol implementation.
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Does/can HDFS manage files across multiple geographically dispersed datacenters? What distributed file systems can be used for this purpose?
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When a new flow arrives at the edge of a WAN, what cost metrics have been proposed for selection of a path? Please assume single path routing.
Also, given different scheduling policies (e.g. Fair Sharing, SRPT and FCFS), what path selection cost metric can improve average completion times of flows?
Thank you!
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A metric for dynamic routing based on variational principles
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Could you point me to any paper, blog, website or presentation that focuses on datacenter or inter-datacenter traffic characteristics (with flow size, duration, inter arrival distributions)? I have not found but a few research papers that report datacenter traffic patterns.
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Thank you all for your answers. I read them all carefully and have written a summary of traffic properties in our latest paper (which is accepted to IEEE Communications Surveys and Tutorials):
Please also feel free to share your comments on the paper's page.
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How Can I provide the required support and guidance as an IT OPERATIONS MANAGER and What are some of the duties and Responsibilities for me to Administer on Window 2008/2012/2016 Servers with respect to the process of Installation, Maintenance and Troubleshooting likewise for SQL 2000/2007/2012 Server and Exchange 2000/2007/2013 administration Skills, and Network Management (TCP/IP, LAN/WAN, VLAN, VPN, DHCP, DNS, Firewall, Fibre Optic) Group Policy 2008+, Kaspersky Antivirus and Mime Cast, Pure Message System Back-up and Recovery in a disciplined approach?
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Thankyou, Himadri Nath Saha for your Answer.
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Assuming we have an optical WAN backbone, how can it be detected if a link has failed? Is it high error rate? Smaller q-Factor? Please elaborate.
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Dear Mohammad,
Link failure is generally detected by optical receivers, not only for fiber cut but also for signal degradation (i.e., excessive BER). You may get more info in references like https://www.juniper.net/documentation/en_US/junos/topics/concept/otn-signal-degrade-monitoring-understanding.html or https://www.google.com/patents/US7826745.
Additionally, upon severe degradation or fiber cut a loss-of-light (LOL) alarm could be issued to NMS/OSS systems.
Best regards,
José Luis
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The cloud network here is referred to LAN & WAN design
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I would like to draw a diagram of the performances of the known LAN, MAN and WAN networks based on the technologies used, the standards, the distance reached and the capacities. I know someone could answer about the wireless context. Is it possible to give me more informations in the context of optical fiber also? Please help ! Thank you all :)
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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!
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One of the sites is broadband enabled using a VDSL modem with wireless 802.11n capabilities connected via a BT infinity 1 connection. Advice on how best to secure this connection would be appreciated. 
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Thank you so much Ali, it really did help.
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I am looking for an alternative to STP for large-scale network deployment. I want to be able to re-calculate the path depending on the network conditions without taking too much on CPU/memory.
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RSTP is alternatives to STP in Open Switch.RSTP is fast STP,it takes less CPU time and less memory adress.