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File sharing While transferring large files from one PC to another, the network speed seems to drop and the process seems to take much longer than it should.

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  • Anonymous Sep 05, 2008

    i want the specification of usb cable used in lap link software and where its available can any body know it pls tell

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Limit Windows VCACHE setting to 32 Meg regardless of the
amount of RAM on the system. I suggest you download and install Cacheman (www.outertech.com). This application lets you change the VCACHE settings easily. Set maximum and minimum disk cache to 32768 and CHUNKSIZE to 512.


Also, I got off the phone with the upper level tech of Microsoft and my problem with FA310 is that mine are C1 or C2 hardware versions which are NDIS (Network Driver Interface Specification) 3. WinME needs NDIS 4 and "prefers" NDIS 5. To see what NDIS your network card is go to regedit LOCAL MACHINE>System>Current Control Set>Services>Class>Net>0000>Ndi>Interfaces


You can see if your network card is on the Hardware Compatibility List that Microsoft certifies at: http://www.microsoft.com/hcl/default.asp

Posted on May 10, 2008

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How do latency and packet loss determine network performance and what can be...


The triumvirate of network performance metrics are packet loss, latency and jitter.

Almost all network applications use TCP (Transmission Control Protocol) to get their data from point A to point B. About 85% of the overall internet's traffic is TCP, of which specific aspect is that it completely hides the packet-based nature of the network from applications. Whether an application hands a single character or a multi-megabyte file to TCP, puts the data in packets and sends it on its way over the network. The internet is a scary place for packets trying to find their way: it's not uncommon for packets to be lost and never make it across, or to arrive in a different order than they were transmitted. TCP retransmits lost packets and puts data back in the original order if needed before it hands over the data to the receiver. This way, applications don't have to worry about those eventualities.

Network latency
TCP has a number of mechanisms to get good performance in the presence of high latencies:
1) Make sure enough packets are kept "in flight". Simply sending one packet and then waiting for the other side to say "got it, send then next one" doesn't cut it; that would limit throughput to five packets per second on a path with a 200 ms RTT. So TCP tries to make sure it sends enough packets to fill up the link, but not so many that it oversaturates the link or path. This works well for big data transfers.
2) For smaller data transfers TCP uses a "slow start" mechanism. Because TCP has to wait for acknowledgments from the receiver, more latency means more time spent in slow start. Web browser performance used to be limited by slow start a lot, but browsers started to reuse TCP sessions that were already out of slow start to download additional images and other elements rather than keep opening new TCP sessions.
3) Also you may use simple open-transfer-close-open-transfer-close sequences that work well on low latency networks but slow down a lot over larger distances or on bandwidth-limited networks, which also introduce additional latency.
4) Try to use a DNS server close by. Every TCP connection is preceded by a DNS lookup. If the latency towards the DNS server is substantial, this slows down the entire process.

Packet loss
Packets are lost in networks for two reasons:
1) Every transmission medium will flip a bit once in a while, and then the whole packet is lost. Wireless typically sends extra error correction bits, but those can only do so much. If such an error occurs, the lost packet needs to be retransmitted. This can hold up a transfer.
But if network latency or packet loss get too high, TCP will run out of buffer space and the transfer has to stop until the retransmitted lost packet has been received. In other words: high latency or high loss isn't great, but still workable, but high latency and high loss together can slow down TCP to a crawl.
2) Another reason packets get lost is too many packets in a short time: TCP is sending so fast that router/switch buffers fill up faster than packets can be transmitted.If TCP has determined that the network can only bear very conservative data transfer speeds, and slow start really does its name justice, it's faster to stop a download and restart it rather than to wait for TCP to recover.
Jitter - is the difference between the latency from packet to packet
Obviously, the speed of light isn't subject to change, and fibers tend to remain the same length. So latency is typically caused by buffering of packets in routers and switches terminating highly utilized links. (Especially on lower bandwidth links, such as broadband or 3G/4G links.) Sometimes a packet is lucky and gets through fast and sometimes the queue is longer than usual. For TCP, this isn't a huge problem, although this means that TCP has to use a conservative value for its RTT estimate and timeouts will take longer. However, for (non-TCP) real-time audio and video traffic, jitter is very problematic, because the audio/video has to be played back at a steady rate. This means the application either has to buffer the "fast" packets and wait for the slow ones, which can add user-perceptible delay, or the slow packets have to be considered lost, causing dropouts.

In conclusion, in networks that use multiple connections to the internet, it can really pay off to avoid paths that are much longer and thus incur a higher latency than alternative paths to the same destination, as well as congested paths with elevated packet loss. The path selecting process can be performed automatically: learnhow to automate evaluation of packet loss and latencyacross multiple providers to choose the best performing route.

on Jan 27, 2015 | Network Software & Management Tools

5 Answers

Why can't I open an NSF file in Lotus Notes client?


If you see an error "File is not database" then try to use the program to restore the NSF Viewer Tool as well as detailed information look here http://www.nsf.viewertool.com/

Apr 25, 2015 | IBM Lotus Notes (d53t7ll-bl) for PC, Mac

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How do I Migrate email data from Outlook 2011 mac to windows outlook 2010 ?


Moving emails from outlook mac to outlook windows is a complicated process as both the platforms are totally independent of each other and does not support each others file formats. Outlook mac supports only olm database files whereas windows outlook only supports pst. Though there are pleanty of methods available like IMAP file transfer etc but the direct and most fruitful method is to simply convert olm file to pst format so that it can be imported in windows outlook. You may employ OLM to PST Converter Pro for conversion process and then import pst into windows outlook to move emails.

Dec 24, 2014 | Microsoft Outlook 2010 for PC...

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How can I migrate Lotus Notes email to Outlook PST 2010?


You can use third party IBM Lotus Notes to MS Outlook utility to migrate your NSF file to PST file format. This utility transfer all NSF file to MS Outlook PST file format in single migration cycle without any hassle. To know more visit here: http://www.lotusnotestoexchange.org/ or download this utility: http://www.lotusnotestoexchange.org/download.html

Apr 23, 2014 | IBM Lotus Notes (d53t7ll-bl) for PC, Mac

1 Answer

Send video files from pc to tv


you can watch video files from an external hard drive, to usb on your Tv, or ...if you want to send video playlists to your TV wirelessly, you can with "Samsung Allshare Software" of the internet installed on your PC...even if you dont have a samsung tv. be warned though, wireless bandwith may drop out watching high data transfers wirelessly, to your tv....an external hard dribe 4TB full of your video files connected to the Tv is your best bet buddy.

Feb 07, 2014 | Network Software & Management Tools

4 Answers

Downloadspeed is low


to accelerate both download/upload speed delete all temp files and make clear cache everyday finaly test ur speed im sure would be faster.find here ur speed

http://www.ip-details.com/internet-speed-test/



Mar 21, 2009 | Network Software & Management Tools

1 Answer

Dameware asking for password?


You have to disable simplified sharing:

1. Click Start, and then click My Computer. 2. On the Tools menu, click Folder Options, and then click the View tab. 3. In the Advanced Settings section, clear the Use simple file sharing (Recommended) check box. 4. Click OK.

http://support.microsoft.com/kb/307874/en-us

Apr 11, 2008 | DameWare Mini Remote Control for PC

1 Answer

File Transfer window not opening


I face the same problem..can some one help pls

Nov 14, 2007 | F-Secure SSH 5.3 Client (FSSHC001)

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