TCP/IP networking is the most prevalent protocol in use today, and dealing with ports is a common task. So, what is a port? Here's a basic explanation. Simply put, a port is a line of communication between two computers. Every computer on a network or on the Internet has an IP address. For internal networks, typically each computer is assigned an IP address like 192.168.0.1, 192.168.0.2, or 192.168.0.3, etc... So data travels between computers and the packets of data have an IP address of the destination computer that should receive the data. It's almost like writing an address on an envelope. Once the computer receives the data, it figures out which port to send the data to. Ports are like channels on a TV or radio stations. Someone has to be listening on that specific channel or port, otherwise the data is discarded. Ports are numbered 1 to 65535 (2^16).
tags: Networking, router, TCP/IP, tutorial
The Opera browser is great for a number of reasons. A superior rendering engine, good memory management, and a wealth of functions that provide a great browsing experience. But what I appreciate most about Opera are its keyboard shortcuts. You can get a list of keyboard shortcuts from Opera Help, (Press F1). Here I'd like to highlight some of the most useful and interesting shortcuts.
Zoom! Continue reading »
tags: Browser, Opera, productivityI'm a firm believer that everything you do on a computer should be accessible through the keyboard. I guess this comes from working on computers back in the days of MS-DOS where the mouse was an afterthought. Actually, at the time, a mouse wasn't even available on most computers. So, I got used to doing everything with the keyboard. I'd argue that remembering keyboard shortcuts makes you a more productive user. Over the years, I've probably accumulated hundreds or even thousands of keyboard shortcuts stored in my head.
One easy "trick" that I like to do is utilize the start menu to run commonly used applications. If you go to the Start menu in Windows XP and right click on an application in "All Programs", you'll get a context menu that'll let you "Pin to Start Menu". So, what you can do is pin a bunch of frequently used icons onto your Start Menu, for easy access. Continue reading »
tags: keyboard shortcuts, tips, tricks, windows xp
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