Deck 8: Cryptography and Network Protocols

Question 1

A(n) _________ can be used to preserve the integrity of a document or a message.

A)message digest
B)message summary
C)encrypted message
D)none of the above

Answer 1

message digest

Question 2

A(n) ________function creates a message digest out of a message.

A)encryption
B)decryption
C)hash
D)none of the above

Answer 2

hash

Question 3

A hash function must meet ________ criteria.

A)two
B)three
C)four
D)none of the above

Answer 3

three

Question 4

Challenge-response authentication can be done using ________.

A)symmetric-key ciphers
B)asymmetric-key ciphers
C)keyed-hash functions
D)all of the above

Question 5

A(n) _____ is a trusted third party that assigns a symmetric key to two parties.

A)KDC
B)CA
C)KDD
D)none of the above

Question 6

The _____________ translates internet domain and host names to IP address.

A)domain name system
B)routing information protocol
C)network time protocol
D)internet relay chat

Question 7

Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?

A)HTTP
B)FTP
C)telnet
D)none

Question 8

Application layer protocol defines

A)types of messages exchanged
B)message format, syntax and semantics
C)rules for when and how processes send and respond to messages
D)all of the above

Question 9

Which one of the following protocol delivers/stores mail to reciever server?

A)simple mail transfer protocol
B)post office protocol
C)internet mail access protocol
D)hypertext transfer protocol

Question 10

Which one of the following is an internet standard protocol for managing devices on IP network?

A)dynamic host configuration protocol
B)simple network management protocol
C)internet message access protocol
D)media gateway protocol

Question 11

User datagram protocol is called connectionless because

A)all UDP packets are treated independently by transport layer
B)it sends data as a stream of related packets
C)both (a) and (b)
D)none of the above

Question 12

Transmission control protocol is

A)connection oriented protocol
B)uses a three way handshake to establish a connection
C)recievs data from application as a single stream
D)all of the above

Question 13

An endpoint of an inter-process communication flow across a computer network is called

A)socket
B)pipe
C)port
D)none of the above

Question 14

Transport layer aggregates data from different applications into a single stream before passing it to

A)network layer
B)data link layer
C)application layer
D)physical layer

Question 15

The ASCII encoding of binary data is called

A)base 64 encoding
B)base 32 encoding
C)base 16 encoding
D)base 8 encoding

Question 16

A high speed communication equipment typically would not be needed for

A)E-mail
B)Transferring large volume of data
C)Supporting communication between nodes in a LAN
D)All of these

Question 17

What is Unicode?

A)Represents symbol or characters used in any langua
B)Only few languages are supported
C)Supports only few characters
D)Characters from A to Z

Question 18

In OSI model dialogue control and token management are responsibilities of ?

A)Session Layer
B)Network layer
C)Transport layer
D)Data link layer

Question 19

An asymmetric-key (or public-key) cipher uses

A)1 Key
B)2 Key
C)3 Key
D)4 Key

Question 20

A straight permutation cipher or a straight P-box has same number of inputs as

A)cipher
B)Frames
C)Outputs
D)Bits

Question 21

Man-in-the-middle attack can endanger security of Diffie-Hellman method if two parties are not

A)Authenticated
B)Joined
C)Submit
D)Separate

Question 22

We use Cryptography term to transforming messages to make them secure and immune to

A)Change
B)Idle
C)Attacks
D)Defend

Question 23

Shift cipher is sometimes referred to as the

A)Caesar cipher
B)Shift cipher
C)cipher
D)cipher text

Question 24

Substitutional cipers are

A)Monoalphabatic
B)Sami alphabetic
C)polyalphabetic
D)both a and c

Question 25

Heart of Data Encryption Standard (DES), is the

A)Cipher
B)Rounds
C)Encryption
D)DES function