Computer network device MODEM - what does it stands for and what is its use?

MODEM (Modulator/Demodulator)
A device that serves as a bridge between your digital computer and some form of analog line used to transmit data, such as a phone line (standard modem) or analog cable connection (cable modem). The modem can receive the analog signals from the line and turn them digital, or transmit your digital signals into analog signals that are capable of being decoded digitally.

IDE and SCSI or skuzzy connection what is the difference them. Explain the significance with respect to hard drives

Integrated Device Electronics (IDE)
IDE is the standard hard drive interface for PCs. You can connect a maximum of two hard drives to an IDE connection or channel. IDE hard drives are cheaper than SCSI drives, but IDE is generally slower than SCSI and does not support sector re-mapping.

Small Computer Systems Interface (SCSI)
Pronounced “skuzzy,” this is a standard data pathway used mostly for hard drives and CD-ROM drives; but it was also a common interface for scanners and even printers at one point. It is the fastest (and the most flexible) method of interfacing with hard drives. It comes in numerous varieties, and is mainly used in servers and high-end workstations. SCSI drives are much more expensive than IDE drives, but SCSI drives can have features, like 15,000 RPM spin speeds and 5-year warranties, that IDE drives currently do not.

Explain what do we mean by the term "Intellectual Property". Discuss the term with a software company as an example.

Intellectual Property (IP)
Any base of knowledge that was developed for a particular company or entity. Usually, if you work for a technical company you have to sign some sort of agreement that states that any work you do or ideas you have while on company time are that company’s intellectual property. As you can imagine, the possession and retention of intellectual property is a lawsuit-laden endeavor. For example, the intellectual property of a software company is not only its software, but also the ideas behind the software, and the methods used to program the software, and just about anything you can imagine about the software.

Generally confused technical words - how to differentiate between internet and intranet?

Internet
The global network of computers constantly connected to each other using standardized communications protocols, specifically TCP/IP.

Intranet
A local network of computers using TCP/IP as the standard communications protocol. Usually an intranet features some sort of HTML content that you can use a browser to look at. Think of it as a mini, private Internet. Many companies have intranets that contain information only of use to their employees.