I got a call from an old friend that his system just locked him out and he couldn't remember the password or somebody just changed it. I asked him to bring it over to my place so i could do a system restore to a previous date before the password was added. After starting the system with a copy of Window vista startup disk I made some time earlier, i found out that the system had no restore point ( ...Read more

PHP Parse error: syntax error, unexpected ‘)’, expecting T_PAAMAYIM_NEKUDOTAYIM in /*/*/File.php on line 160What the heck does that word mean? you are definately right its not english. When i got this message staring at me from my web page, I had no clue what went wrong with my code, i just googled the word and it turned out to be a hebrew word meaning “Twice Colon“(still no clue what wen ...Read more

A ring is simply a bus that is folded back onto itself. A ring topology is illustrated in Figure below. User traffic flows in one direction around the ring. In some other approaches a second transmission medium is added for flow in the opposite direction. Such a dual counter rotating ring concept improves reliability in case of a failed station or a cut in the ring. A star network is illustrate ...Read more

A bus is a length of transmission medium from which users tap into, as shown in Figure below. Originally the medium was coaxial cable. Normally, this cable is terminated at either end, and can never be allowed to form a closed loop. Today coaxial cable is being phased out in favor of unshielded twisted pair (UTP) or fiber-optic cable. Read more

The Network Interface Card (NIC) or LAN card or Ethernet card as called by some is a part of the physical component that makes up a wired network. Most modern LAN cards only have the fast Ethernet port and the status LED indicating transmission speed (100Mb/s, 10Mb/s) or link state. Ethernet uses the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) media contention access method ...Read more

Computer network from my understanding is the interconnection of two or more computers for the purpose of sharing data. When we have two computers connected via a cross cable or any other networking medium we say we have a network. A more professional definition: Networking is the practice of linking computing devices together with hardware and software that supports data communications across th ...Read more

Inverter circuits are among the most sort after circuit by professionals and hobbyist alike. Inverters are used to convert dc power into ac power (pretty much the opposite of a converter circuit) or in a more professional term inverters are circuits that convert dc input voltage to a symmetric ac output voltage by which both magnitude and frequency can be controlled. . This tutorial is aimed at t ...Read more