Why is error detection important in data transmission?, To make the computer faster, To make data look nicer, To increase the size of the file, To check if data was corrupted, lost, or changed, Which of the following can cause errors during data transmission?, Electrical interference, Data skewing, All of the above, Packet switching problems, What is a parity bit?, A type of virus, An extra bit added to a byte to help detect errors, A bit used to delete data, A password for encryption, In even parity, the total number of 1s must be:, Even, Zero, Always seven, Odd, In odd parity, the total number of 1s must be:, Always eight, Odd, Even, Always one, Which error detection method adds the values of data blocks and sends the total?, Echo check, Packet switching, Checksum, Encryption, If the sender sends data values 2, 4, 6, and 8, what is the checksum?, 10, 12, 24, 20, What happens during an echo check?, The receiver sends the data back to the sender for comparison, The data is encrypted only, The data is deleted, The sender changes the message, What does ARQ stand for?, Advanced Repair Question, Automatic Repeat Request, Automatic Random Query, Active Response Quality, What does a positive acknowledgement mean in ARQ?, Data was corrupted, Data needs encryption, Data was deleted, Data was received correctly, What does a negative acknowledgement mean in ARQ?, The data was received with an error, The data was encrypted correctly, The message was understood, The transmission is complete, What happens if no acknowledgement is received before the timeout?, The data is ignored forever, The receiver deletes the file, The sender automatically resends the data, The network shuts down, What is the purpose of encryption?, To make data unreadable to unauthorized users, To remove errors from data, To increase computer speed, To delete private information, The original readable data before encryption is called:, Checksum, Plaintext, Ciphertext, Parity data, Data that has been encrypted is called:, Skewed data, Plaintext, Ciphertext, Packet, Does encryption stop hackers from intercepting data?, No, it makes data larger, Yes, always, Yes, but only in schools, No, but it makes the data unreadable, Symmetric encryption uses:, One secret key for encryption and decryption, Two public keys, Only a password, No key, Asymmetric encryption uses:, A checksum and a parity bit, One shared secret key, Only a private key, A public key and a private key, Which key can be shared with everyone in asymmetric encryption?, Secret key, Public key, Private key, Password key, Which key should only be known by the owner?, Checksum key, Public key, Private key, Echo key, Name two methods used to detect errors in data transmission., Public key and private key, Login and password, Parity check and checksum, Compression and backup, Give one real-world example where error detection is important., Online banking, Changing wallpaper, Charging a mouse, Typing a title, Why is a checksum useful?, It speeds up hardware, It deletes damaged files, It hides data from users, It helps check whether received data matches sent data, Why is asymmetric encryption more secure than symmetric encryption?, It needs no key, It uses public and private keys, It removes all errors, It is always faster, What is data skewing?, Data is fully encrypted, Packets are deleted, Bits arrive at different times, Files are compressed

9th Detecting Errors and Encryption

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