The biggest disadvantage of packet switching, which transfers digital information in discrete blocks rather than in a continuous stream, is having data arrive in bundles that must be reassembled at the reception point. When packets are routed through various network adapters, buffers and switches, they can arrive at their destination out of their original sequence. This makes the technology less than ideal for applications such as voice-over-Internet.Know More
An alternate method of delivering data is circuit switching, which requires a point-to-point and continuous connection between transmission and reception. An example of circuit switching is the telephone call. Packet switching is cheaper because the user pays a fee per unit of data while circuit switching is charged by connection time. For this reason, packet switching is preferred for transmitting data while circuit switching is the preferred method for voice.
The biggest impediments to packet switching for voice applications are latency (delay) and poor voice quality, because packets containing voice signals can arrive at the destination (listener) at various times and out of order. With packet switching, blocks of data seek the most efficient routes for transmission as circuits become available, which is economical for transmitting large amounts of data. The Internet is based on packet switching, but most corporations have a hybrid system employing both methods of transmission.Learn more about Internet & Networking
Disadvantages of using the Internet are loneliness, lack of face-to-face communication, poor conflict resolution, diminishing interpersonal skills, overdependence on technology, mood swings and physical problems such as painful wrists and arms and obesity. Potential financial loss is another possibility. People who use the Internet to carry out banking and other forms of financial transactions are at a risk of losing their money, as hackers are always on the prowl.Full Answer >
A packet sniffer is a network tool used by technicians to identify and analyze problems with the network. A packet sniffer can also be utilized by hackers to mine data, such as identity information. Packet sniffers come in both hardware and software forms.Full Answer >
Internet users need a modem to connect to the Internet because signals that comes from telephone and cable lines are analog, and computers can only process digital information. The modem takes the analog signal from the connection line and converts it into digital information that the computer can read.Full Answer >
A modem is a device that is capable of encoding digital information by varying one or more properties of the carrier signal, sending this signal through a telephone line, and decoding the information once it has been transmitted by demodulating the signal. The modem on one side of the communication line modulates and transmits the data, while the modem on the other side receives and demodulates it.Full Answer >