Almost a year ago I had posted that I have got a new laptop hp 6910p, laptop has been working fine but just after a year its battery has completely died down.

It only gives a backup time of 5 minutes and sometimes not even that and as soon as the AC power is switched off the laptop shuts itself down.

Now I understand that batteries usually only last about a year or two but what is concerning me is that laptop does not even go for hibernation and just shuts down abruptly, causing loss of current work and data.
I believe the batteries of Mobile Phones have advanced quite a bit, they run for many years without any significant loss and give a great backup time, I think the laptop industry also needs to learn few things about batteries from the cell phone manufactures specially Nokia!!

arp –a Displays the ARP entries in Windows by checking the current
arp cache data. If inet_addr is specified then only ARP for the specified IP address is displayed
arp –g also works the same and can be used to display the Windows arp entries

When you are having problems with your wireless connection and it keeps dropping then there are there entities involved
1) Your PC
2) Your Router
3) Your ISP or the connection that is terminating at your home

Problem in any of the above can cause you to randomly drop the internet connection

1) Check the router, Does it LEDs indicate any error ? are you able to ping the router from your computer or laptop (usually 192.1.68.1.1 or 192.168.0.1)
2) If you have more then one PC available then also check the same from other PCs in the network, are they able to access the router? Try opening router’s configuration Page
3) If you are not able to ping / access the router then it means that your problem lies locally , most likely your router is malfunctioning and hanging , which can be result of buggy firmware of the router , router over heating, not being able to handle the load of traffic passing through it
4) Quick and easy solution to this is to reboot your router but it will only resolve the problem for sometime, for permanent solution you will need to check with your router vendor, upgrade if there are any new firmware’s available for the router.

If you are able to access the router while your wireless connection keeps dropping, then it is most likely to be a problem with your ISP.
1) Log-in to the router and check the status of your WAN connection
2) Is your wireless router directly terminating the connection coming from the ISP? (i.e. it is a ADSL wireless router or router with cable or WiMAX modem ) If no, then you will need to login to the other device which is terminating the connection from ISP and also check the WAN connection status there
3) If the WAN connection is down then you need to involve your ISP to find the reason of dropping WAN connection, If it is a ADSL connection the check for any problem in phone line, bad lines are the common cause of dropping connections, get in touch with the ISP and ask them to clear the phone lines , the modems also have a nice GUI where they post a detailed status of the line, if you notice anything unusual then take a screenshot and share it with your ISP personnel . similarly for WiMAX connections you can check for things like signal strength etc

Bandwidth used by VoIP calls depends on the Media Codec that is being used for the VoIP session, traditional phones lines user the G711 or PCM encoding which requires 64kbps of bandwidth. G711 can also be used in VoIP but it isn’t bandwidth efficient . To be used with VoIP more resilient and light weight codecs have been developed which provide Voice quality comparable to a normal phone while using very less bandwidth and resources

Commonly used VoIP codec’s include

Codec Bandwidth Used

    G711 64kbps
    G723
    G729 8kbps
    G726 16/24/32/40kbps
    GSM 13 kbps
    iLBC 13-15kbps

    Each of these VoIP codecs not only differ in the bandwidth that they utilize but are in fact totally different algorithms for the coding of VoIP voice packets varying in things like CPU processing load, Silence suppression, VAD etc. The quality of voice provided by these also differs.

So in short, we cannot generalize that how much bandwidth will be utilized if we use VoIP for making calls as it is tied with the codec being used for that particular session

Sometimes certain applications require you to change the MTU size of your routers from the default value of 1500, as some services fail to execute properly due to the communication gap created by the unsupported MTU size

For your linksys WRT54G router you can easily change the MTU size, just login to the router at administration portal at http://192.168.1.1

Go to the Basic Setup tab present under the Main setup menu, under the router name and domain name is the filed where you can set the MTU size, by default it is set to 1500, select Manual from MTU menu and then define you customized MTU value in the text box below .

WRT54G MTU Size Change

WRT54G MTU Size Change

Yes, you can transfer files over a remote desktop connection

For transferring or copying files 1st to need to share you local drive or partitions with the remote PC

Following are the steps that you need to follow

For Windows Vista

1) Open the remote desktop connection, this will open a window with the IP of remote computer along with connect button, there is also a options button there
2) Click on the options button to expand it
3) You will see text saying ‘Choose the devices and resources on this computer that want to use in your remote connection
4) In the area below there is check box for drives, below which all you hard drive partitions are listed
5) Now you select can any drives/partitions that you want and it will become available at the remote computer, after you connect to it
6) The drives that you selected here will be visible in the explorer of remote computer as a mapped network drive

For Windows XP
1) Open the remote desktop connection, this will open a window with the IP of the remote computer along with the connect button, there is also a options button there.
2) Click on the options button to expand it
3) Go to the tab of local resources and select the ‘Disk Drives’ option under local resources section

Remote Desktop File Transfer

Remote Desktop File Transfer

4) That’s it, now after connecting to the remote desktop computer your local hard drive will be also visible there and you will easily able to move, copy and transfer files between remote desktop connection and local computer