IG1 Glossary - U2 Data Transmission

a message sent to the receiver indicating that data has been received correctly (used in the ARQ error detection method)

Answer explanation

确认

Tags

error detection

a type of encryption that uses public keys and private keys to ensure that data is secure

Answer explanation

非对称加密

Tags

encryption

ARQ a method of checking transmitted data for errors; it makes use of acknowledgement and timeout to automatically request re-sending of data if the time interval before positive acknowledgement is too long

Answer explanation

自动重发请求

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encryption

an additional digit appended to a number to check if the entered number is error-free; the check digit is a data entry check and not a data transmission check

Answer explanation

校验位

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error detection

an additional digit appended to a number to check if the entered number is error-free; it is a data entry check and not a data transmission check

Answer explanation

校验位

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error detection

a verification method used to check if data transferred has been altered or corrupted; calculated from the block of data being sent, the value which is sent after each data block

Answer explanation

校验和

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error detection

encrypted data that is the result of putting a plaintext message through an encryption algorithm

Answer explanation

密文

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error detection

an error-checking method in which all the 1-bits in the data packet payload are added and the total is stored in the packet trailer; the same calculation is repeated at the receiving station

Answer explanation

循环冗余校验

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error detection

a small part of a message/data that is transmitted over a network; after transmission all the data packets are reassembled to form the original message/data

Answer explanation

数据包

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data packet

another name for a hacker who intercepts data being transmitted on a wired or wireless network

Answer explanation

窃听者

Tags

encryption