ITM 207 FINAL EXAM COMPREHENSIVE
TEST PAPER WITH SOLVED QUESTIONS
◉ Video codec (compressor/decompressor)
Answer: methods used to shrink the size of a movie to allow it to
be played on a computer or over a network
◉ Temporal compression
Answer: a technique based on differences between consecutive
frames, if most of an image in two frames has not changed, why
should we waste space duplicating information?
◉ Spatial compression
Answer: a technique based on removing repetitive information
within a frame. This problem is essentially the same as that faced
when compressing still images
◉ Cryptography
Answer: the field of study related to encoded information
◉ Encryption
Answer: the process of converting plaintext into ciphertext
◉ Decryption
,Answer: the process of converting ciphertext into plaintext
◉ Cipher
Answer: an algorithm used to encrypt and decrypt text
◉ Key
Answer: the set of parameters that guide a cipher. Neither is any
good without the other
◉ Substitution cipher
Answer: a cipher that substitutes one character with another
◉ Caesar cipher
Answer: a substitution cipher that shifts characters a certain
number of positions in the alphabet
◉ Transposition ciphers
Answer: a cipher that rearranges the order of existing characters
in a message in a certain way
◉ Cryptanalysis
Answer: the process of decrypting a message without knowing
the cipher or the key used to encrypt it
, ◉ Public-key cryptography
Answer: an approach in which each user has two related keys, one
public and one private
◉ Digital signature
Answer: data that are appended to a message, made from the
message itself and the sender's private key, to ensure the
authenticity of the message
◉ Digital certificate
Answer: a representation of a sender's authenticated public key
used to minimize malicious forgeries
◉ Gate
Answer: a device that performs a basic operation on electrical
signals
◉ Circuits
Answer: gates combined to perform more complicated tasks
◉ Boolean expressions
Answer: uses boolean algebra: a mathematical notation for
expressing two valued logic
◉ Logic diagrams
TEST PAPER WITH SOLVED QUESTIONS
◉ Video codec (compressor/decompressor)
Answer: methods used to shrink the size of a movie to allow it to
be played on a computer or over a network
◉ Temporal compression
Answer: a technique based on differences between consecutive
frames, if most of an image in two frames has not changed, why
should we waste space duplicating information?
◉ Spatial compression
Answer: a technique based on removing repetitive information
within a frame. This problem is essentially the same as that faced
when compressing still images
◉ Cryptography
Answer: the field of study related to encoded information
◉ Encryption
Answer: the process of converting plaintext into ciphertext
◉ Decryption
,Answer: the process of converting ciphertext into plaintext
◉ Cipher
Answer: an algorithm used to encrypt and decrypt text
◉ Key
Answer: the set of parameters that guide a cipher. Neither is any
good without the other
◉ Substitution cipher
Answer: a cipher that substitutes one character with another
◉ Caesar cipher
Answer: a substitution cipher that shifts characters a certain
number of positions in the alphabet
◉ Transposition ciphers
Answer: a cipher that rearranges the order of existing characters
in a message in a certain way
◉ Cryptanalysis
Answer: the process of decrypting a message without knowing
the cipher or the key used to encrypt it
, ◉ Public-key cryptography
Answer: an approach in which each user has two related keys, one
public and one private
◉ Digital signature
Answer: data that are appended to a message, made from the
message itself and the sender's private key, to ensure the
authenticity of the message
◉ Digital certificate
Answer: a representation of a sender's authenticated public key
used to minimize malicious forgeries
◉ Gate
Answer: a device that performs a basic operation on electrical
signals
◉ Circuits
Answer: gates combined to perform more complicated tasks
◉ Boolean expressions
Answer: uses boolean algebra: a mathematical notation for
expressing two valued logic
◉ Logic diagrams
