Flashcards
Data Exchange - Packet Switching
Flashcards do conjunto (10)
- 1Description of packet switchingPacket switching is the process of data being broken into 'packets' before being sent through a network and then re-assembled at the other end.
- 2Advantages of packets switchingPackets chose different routes so traffic flow is efficient.
Big files can still be sent but don't clog network.
Packets give security benefit because if intercepted, the hacker will only have one part of a file. - 3Disadvantages of packet switchingIf one or more packets are lost corrupted during transmission, the whole file will not be received correctly.
- 4What are codecs?A codec is a device or computer program which encodes or decodes a digital data stream or signal. Codec is a portmanteau of coder-decoder. In electronic communications, an endec is a device which acts as both an encoder and a decoder on a signal or data stream, and hence is a type of codec.
- 5Simplex with exampleSimplex communication is a communication channel that sends information in one direction only. The International Telecommunication Union definition is a communications channel that operates in one direction at a time, but that may be reversible; this is termed half duplex in other contexts. For example include radio broadcasting, television broadcasting, computer to printer communication, and keyboard to computer connections. Information can be broadcast in both directions in a simplex circuit, but not at the same time, like a duplex.
- 6Full duplex with exampleA duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. For example device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. In these devices, the communication is only in one direction.
- 7Half duplex with exampleHalf-duplex devices can only transmit in one direction at one time. With half-duplex mode, data can move in two directions, but not at the same time. The term duplex, on its own, refers to the capability to send and receive data. For example An example of a half-duplex system is a two-party system such as a walkie-talkie, wherein one must use "over" or another previously designated keyword to indicate the end of transmission and ensure that only one party transmits at a time.
- 8Serial and parallel transmission descriptionSerial data transmission sends data bits one after another over a single channel.
Parallel data transmission sends multiple data bits at the same time over multiple channels. - 9Benefit and limitation of aboveBenefits of serial data transmissions are good over large distances
Benefits of parallel data transmissions are faster because more bits are transferred per second. - 10LimitationsLimitations of serial data transmission are complex because data has to be broken into individual bits.
Limitations of parallel data transmission are shorter distance maximum about 5 meters.
Informações
- Descrição
- Year 11 IT FlashCards sobre Data Exchange - Packet Switching, criado por Miran Mohammed em 07-01-2021.
- Criado por
- Miran Mohammed
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