Friday, September 11, 2009
Hoe to change Process Priority ?
Note that depending on the process and your administrative rights to your machine, you may not be able to change a particular process's priority.
How to put the Desktop in your Taskbar ?
Wednesday, September 9, 2009
CSU/DSU - Connectivity in Detail
Point-to-Point Serial Links
In the network at your job, most likely the serial interfaces on your
Cisco routers are not connected to each other directly. They connect
to a CSU/DSU, which supplies a clock rate to the router, allowing the
line protocol to stay up.
In the world of Cisco exams, and in your practice lab, there are
generally routers that have directly connected serial interfaces. These
routers are connected to each other by a DCE/DTE cable; the DCE end
of the cable will connect to the router that is acting as the CSU.
What’s The Line Protocol?
You’ll see a lot of discussion in CCNA and CCNP texts, but rarely does
anyone actually say what the line protocol is. The Cisco IOS Command
Reference defines the line protocol as "indicating whether the software
processes that handle the line protocol consider the line usable (that
is, keepalives are successful) or whether it has been taken down by an
administrator."
Translation: When the line protocol is down, there’s a problem with
the keepalives or the encapsulation type.
To tell the DTE end from the DCE end before connecting it, look for a
small label wrapped around one or both of the cable ends. That label
will indicate whether that is the DCE or DTE end. If there is no label,
the connector itself may have DTE or DCE imprinted on it.
After connecting the cable to the respective routers, use show
controller to ensure the router sees the cable as a DCE or DTE.
R1#show controller serial 1
HD unit 1, idb = 0x107114, driver structure at 0x10C590
buffer size 1524 HD unit 1, V.35 DTE cable
R3#show controller serial 1
HD unit 1, idb = 0xC7D1C, driver structure at 0xCCAA0
buffer size 1524 HD unit 1, V.35 DCE cable
The routers will not be able to communicate at this point, however.
Remember that when a serial interface connects to a CSU/DSU, the
interface receives clocking from that device. There is no CSU/DSU
involved when two serial interfaces are directly connected; therefore,
one of the devices must supply a clock rate to the other. The DCE
interface must supply the clock rate to the DTE.
R3(config)#int serial 1
R3(config-if)#clockrate 56000
<>
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to up
R3#ping 172.12.13.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.12.13.1, timeout is 2 seconds:
!!!!!
In The REAL World…
For exam purposes, you need to memorize the fact that the DCE is the
interface that needs to have the clock rate configured. When you’re at
your practice rack, you’ll find out that you can’t put the clockrate on
the DTE, because the router won’t let you!
Monday, September 7, 2009
Steps to Uninstall Internet Explorer 7
How to Uninstall Internet Explorer 7
Microsoft has finally released Internet Explorer 7. It has some nice features including a revised interface, tabbed browsing, improved printing features, and a phishing filter. However, during the time between the releases of IE6 and IE7, other companies have produced browsers that have similar or better features and many customers have started using these browsers like Firefox, Opera, Avant and others.
Unfortunately instead of just offering Internet Explorer 7 as an optional download, they are pushing it to customers via the Automatic Windows Update. Which means you may wake up one day soon, after leaving your computer on, and have a brand new browser replacing Internet Explorer 6.0. This may seem fine for most people, however many people are simply resistant to much change and will find using IE7 more difficult than just using their current browser to surf the web. In these cases, you'll want to know how to uninstall Internet Explorer 7 and keep it off your computer.
Beyond the basic resistance to change issues, there have been other issues that I have experienced on several computers that make me want to wait before upgrading to Internet Explorer 7. Among these issues are conflicts with some third party applications, most noteably Norton Antivirus and Norton Internet Security. I have seen several instances of systems freezing when trying to open a browser window after installing IE7. Usually this can be fixed by simply uninstalling IE7, however on one instance even this did not correct the problem. A combination of registry cleaners and other software had to be used to correct the issues.
Uninstalling Internet Explorer 7
Follow the steps below to uninstall Internet Explorer 7
- Close Internet Explorer and any open windows
- Click on Start, click on control panel
- Double-click on Add/Remove Programs
- Find the Internet Explorer 7 program - it should appear similar to the picture below
- Click the Remove button and complete the removal. Your browser will revert to the last version of Internet Explorer you had installed on your computer, in most cases this will be Internet Explorer 6.0
Stopping Automatic Updates from downloading Internet Explorer 7 (IE7)
If IE7 was downloaded through the Windows Automatic Updates, you'll want to modify the updates so it doesnt download again. Follow the instructions below to do this.
- Open Internet Explorer and go to the following site
http://windowsupdate.microsoft.com - When the Update page opens, click on Custom
- Uncheck the box for Windows Internet Explorer 7.0 for windows.
- Check the box for Don't show this update again
- Check the boxes for any other updates you wish to download and install them
Friday, September 4, 2009
Solve Registry Problem With Ease
Now that you've determined that a faulty registry is the culprit of your increasingly frustrating and dysfunctional computer, what do you do next? Here's a rundown of the various things you could do to try to bring your computer back to its old self.
The first thing you'll want to try is a system restore. Here's the easiest way to do that, assuming you're running Windows 2000, 2003, XP or Vista:
First, go to Start > All Programs > Accessories > System Tools > Backup (or "System Restore" in Vista ).
Then you're going to want to choose a restore point prior to when you started experiencing registry related problems.
Follow the prompts in order to complete the restoration process. Keep your fingers crossed that this solves your problems. If your computer is still not working properly (or there were no available restore points), then you might have to try to remove the invalid registry entries yourself.
Do not do anything to your registry without making a backup first.
The next step is to actually edit your registry, which can be done manually, or automatically with a safer and simpler option like RegCure.
If you choose to do it manually,it is crucial that you are 100% sure that you know what you're doing . One small modification to your registry, if done incorrectly, can be enough to render your computer completely unable to function, and essentially useless.
And that usually means the loss of all your files, and of course, the use of your PC.
Every Windows computer has a default registry editor that can be used to manually edit your registry. (It goes without saying that if you don't know what or where that is, you probably shouldn't be tampering with your registry yourself.)
The quickest, simplest and safest thing to do is to use a registry repair program like RegCure, which automatically:
-Backs up your registry
-Scans your registry, and identifies errors
-Corrects the problems safely & properly
-Restores your PC's full functionality and improves performance
Click Here!By,
Networksavvy
