Data Transmission and Encryption Quiz

What is the primary purpose of data packets in transmission?

• To encrypt the data

• To allow data to be sent independently

• To increase the size of the data

• To compress the data

Which of the following is NOT a method of error detection?

• Data compression

• Parity checks

• Checksum

• Echo check

What does the payload of a data packet contain?

• The sequence number of the packet

• The size of the packet

• The IP addresses of sender and receiver

• The actual data being sent

Which type of data transmission allows data to be sent in both directions simultaneously?

• Serial

• Full-duplex

• Half-duplex

• Simplex

What is the main drawback of packet switching?

• Packets can be lost and need to be re-sent

• It is slower than circuit switching

• It is less secure than other methods

• It requires more hardware

In symmetric encryption, what is used to encrypt and decrypt the data?

• Two different keys

• A single key

• Public and private keys

• A password

What is the purpose of a check digit?

• To increase the data size

• To compress the data

• To verify the integrity of data entry

• To encrypt the data

Which of the following describes echo check?

• Data is sent in blocks

• Data is sent back to the sender for comparison

• Data is encrypted using a public key

• Data is compressed before transmission

What is the role of a router in packet switching?

• To store the data packets

• To encrypt the data packets

• To compress the data

• To determine the next route for packets

Which method uses positive and negative acknowledgements to ensure data integrity?

• Checksum

• Parity check

• Echo check

• Automatic Repeat Request (ARQ)