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WorksheetsDATA TRANSMISSION AND ERROR DETECTION METHODS
Total questions: 26
Worksheet time: 13mins
Data can travel in both directions, but not at the same time.
Simplex
Half-Duplex
Duplex/Full Duplex
Serial
Parallel
Data can travel from one direction only, from sender to receiver.
Simplex
Half-Duplex
Duplex/Full Duplex
Serial
Parallel
Data can travel in both directions and at the same time.
Simplex
Half-Duplex
Duplex/Full Duplex
Serial
Parallel
Data is sent a bit at a time along a single wire or channel
Simplex
Half-Duplex
Duplex/Full Duplex
Serial
Parallel
Several bits of data are sent at once along several wires or channels.
Simplex
Half-Duplex
Duplex/Full Duplex
Serial
Paralel
Data can travel from one direction only, from sender to receiver, a bit at a time along a single wire or channel
Simplex, Serial
Half-Duplex, Serial
Duplex, Parallel
Serial, Half-Duplex
Half-Duplex, Parallel
Data can travel in both directions, but not at the same time, through multiple wires or channels.
Simplex, Serial
Half-Duplex, Serial
Duplex, Parallel
Serial, Half-Duplex
Half-Duplex, Parallel
Data can travel in both directions, at the same time, through multiple wires or channels.
Simplex, Serial
Half-Duplex, Serial
Duplex, Parallel
Serial, Half-Duplex
Half-Duplex, Parallel
Data can travel in both directions, not at the same time, one bit at a time through one wires or channel.
Simplex, Serial
Duplex, Serial
Duplex, Parallel
Half-Duplex, Serial
Half-Duplex, Parallel
Data can travel in both directions, not at the same time, one bit at a time through two or more wires/channels.
Simplex, Serial
Half-Duplex, Serial
Duplex, Parallel
Duplex, Serial
Half-Duplex, Parallel
What is meant by the term ciphertext when used in encryption?
an encryption or decryption algorithm
an encrypted message
a type of session key
another name for plaintext
text following an encryption algorithm
When carrying out asymmetric encryption, which of the following users would keep the private key?
THE SENDER
THE RECEIVER
BOTH SENDER AND RECEIVER
ALL RECEIPENTS OF THE MESSAGE
NONE OF THE ABOVE
In encryption, which of the following is the term used to describe the message before it is encrypted?
SIMPLE TEXT
PLAIN TEXT
NOTEXT
CIPHERTEXT
FIRSTTEXT
Which of the following is the biggest disadvantage of using symmetric encryption?
it is very complex and time consuming
it is rarely used anymore
the value of the key reads the same in both directions
it only works on computers with older operating systems
there is a security problem when transmitting the encryption key
Which of the following is the correct name for a form of encryption in which both the sender and the recipient use the same key to encrypt and decrypt?
symmetric key encryption
asymmetric key encryption
public key encryption
same key encryption
block cipher encryption
What of the following is the final number in a code, which is calculated from all the numbers in the code; its purpose is to find errors in data entry?
PARITY CHECK
CHECKSUM
CYCLICK REDUNDANCY CHECK
PARITY BIT
CHECK DIGIT
Which of the following is a form of error detection that makes use of a system of acknowledgements and timeouts?
AUTOMATED REPEAT REQUEST
ECHO CHECK
CHECK DIGIT
PARITY BIT
CYCLIC REDUNDANCY CHECK
Which of the following methods uses an extra bit added to a byte to ensure it contains an even number of 1s or odd number of 1s?
CYCLIC REDUNDANCY CHECK
PARITY CHECK
CHECKSUM
CHECK DIGIT
ECHO CHECK
Which of the following uses a calculated value which is sent after a block of data; the receiving computer also calculates the value from the block of data and compares the values?
CYCLIC REDUNDANCY CHECK
PARITY CHECK
CHECKSUM
CHECK DIGIT
ECHO CHECK
Which of the following describes the check where the receiving computer sends back a copy of the data to the sending computer to allow it to compare the data?
CYCLIC REDUNDANCY CHECK
PARITY CHECK
CHECKSUM
CHECK DIGIT
ECHO CHECK
What error verification method is this image representing?
CYCLIC REDUNDANCY CHECK
PARITY CHECK
CHECKSUM
CHECK DIGIT
ECHO CHECK
What concept is this diagram showing and example of?
PACKET SWITCHING
PARITY CHECK
PACKET SEARCHING
CHECK DIGIT
ECHO CHECK
What concept is this diagram showing and example of?
PACKET SWITCHING
DATA PACKET
PACKET SEARCHING
CHECK DIGIT
ECHO CHECK
The header of a data packet contains?
THE IP ADDRESS OF THE SENDER
THE IP ADDRESS OF THE RECEIVER
SYZE OF THE PACKET IN BYTES
THE ACTUAL DATA IN THE PACKETS
METHOD IDENTIFYING THE END OF THE PACKET AND AN ERROR CHECKING METHOD
The payload of the data packet contains?
THE IP ADDRESS OF THE SENDER
THE IP ADDRESS OF THE RECEIVER
SYZE OF THE PACKET IN BYTES
THE ACTUAL DATA IN THE PACKETS (around 64kibibytes)
METHOD IDENTIFYING THE END OF THE PACKET AND AN ERROR CHECKING METHOD
The trailer of the data packet contains?
THE IP ADDRESS OF THE SENDER
THE IP ADDRESS OF THE RECEIVER
SYZE OF THE PACKET IN BYTES
THE ACTUAL DATA IN THE PACKETS (around 64kibibytes)
METHOD IDENTIFYING THE END OF THE PACKET AND AN ERROR CHECKING METHOD
