WGU D431 OA COMPUTER FORENSICS
PRACTICE EXAM SET 2026 SOLVED
QUESTIONS GRADED A+
◉ RAID 6. Answer: RAID 6 is a striped set with dual distributed
parity. This RAID level is similar to RAID 5, RAID 6 offers both
backup and increased speed. Additionally, a RAID 6 array can
continue operating if up to two of its drives fail. This requires a
minimum of 4 drives.
◉ carrier. Answer: The signal, stream, or data file into which the
payload is hidden.
◉ least significant bit (LSB). Answer: The last bit or least significant
bit is used to store data.
◉ payload. Answer: The data to be covertly communicated. In other
words, it is the message you want to hide.
◉ channel. Answer: The type of medium used to hide data in
steganography. This may be photos, video, sound files, or Voice over
IP.
,◉ Steganophony. Answer: The use of steganography with sound
files.
◉ Caesar cipher. Answer: The method of cryptography in which
someone chooses a number by which to shift each letter of a text in
the alphabet and substitute the new letter for the letter being
encrypted. For example, if your text is "A CAT," and you choose to
shift by two letters, your encrypted text is "C ECV." This is also
known as a monoalphabet, single-alphabet, or substitution cipher.
◉ Vigenere cipher. Answer: A method of encrypting alphabetic text
by using a series of different monoalphabetic ciphers selected based
on the letters of a keyword. A polyalphabetic cipher.
◉ Substitution. Answer: In cryptography, the method of changing
some parts of the plaintext for some matching part of the ciphertext.
◉ Transposition. Answer: In terms of cryptography, this is the
swapping of blocks of ciphertext.
◉ block cipher. Answer: A form of cryptography that encrypts data
in blocks; 64-bit blocks are quite common, although some
algorithms (like AES) use larger blocks.
, ◉ Feistel function. Answer: A cryptographic function that splits
blocks of data into two parts. It is one of the most influential
developments in symmetric block ciphers.
◉ keyspace. Answer: The total number of keys.
◉ Euler's Totient. Answer: The total number of coprime numbers.
Two numbers are considered coprime if they have no common
factors.
◉ Cryptanalysis. Answer: A method of using techniques other than
brute force to derive a cryptographic key.
◉ Kasiski examination. Answer: A method of attacking
polyalphabetic substitution ciphers by deducing the length of the
keyword. This is sometimes also called Kasiski's test or Kasiski's
method.
◉ The most common way steganography is accomplished is via.
Answer: LSB
◉ In steganography, the ________ is the stream or file into which the
data is hidden.. Answer: carrier
PRACTICE EXAM SET 2026 SOLVED
QUESTIONS GRADED A+
◉ RAID 6. Answer: RAID 6 is a striped set with dual distributed
parity. This RAID level is similar to RAID 5, RAID 6 offers both
backup and increased speed. Additionally, a RAID 6 array can
continue operating if up to two of its drives fail. This requires a
minimum of 4 drives.
◉ carrier. Answer: The signal, stream, or data file into which the
payload is hidden.
◉ least significant bit (LSB). Answer: The last bit or least significant
bit is used to store data.
◉ payload. Answer: The data to be covertly communicated. In other
words, it is the message you want to hide.
◉ channel. Answer: The type of medium used to hide data in
steganography. This may be photos, video, sound files, or Voice over
IP.
,◉ Steganophony. Answer: The use of steganography with sound
files.
◉ Caesar cipher. Answer: The method of cryptography in which
someone chooses a number by which to shift each letter of a text in
the alphabet and substitute the new letter for the letter being
encrypted. For example, if your text is "A CAT," and you choose to
shift by two letters, your encrypted text is "C ECV." This is also
known as a monoalphabet, single-alphabet, or substitution cipher.
◉ Vigenere cipher. Answer: A method of encrypting alphabetic text
by using a series of different monoalphabetic ciphers selected based
on the letters of a keyword. A polyalphabetic cipher.
◉ Substitution. Answer: In cryptography, the method of changing
some parts of the plaintext for some matching part of the ciphertext.
◉ Transposition. Answer: In terms of cryptography, this is the
swapping of blocks of ciphertext.
◉ block cipher. Answer: A form of cryptography that encrypts data
in blocks; 64-bit blocks are quite common, although some
algorithms (like AES) use larger blocks.
, ◉ Feistel function. Answer: A cryptographic function that splits
blocks of data into two parts. It is one of the most influential
developments in symmetric block ciphers.
◉ keyspace. Answer: The total number of keys.
◉ Euler's Totient. Answer: The total number of coprime numbers.
Two numbers are considered coprime if they have no common
factors.
◉ Cryptanalysis. Answer: A method of using techniques other than
brute force to derive a cryptographic key.
◉ Kasiski examination. Answer: A method of attacking
polyalphabetic substitution ciphers by deducing the length of the
keyword. This is sometimes also called Kasiski's test or Kasiski's
method.
◉ The most common way steganography is accomplished is via.
Answer: LSB
◉ In steganography, the ________ is the stream or file into which the
data is hidden.. Answer: carrier
