Network Protocols

What is meant by encryption?

• Encoding a message so that it cannot be understood by anyone other than its intended recipient

• Abbreviating data for quicker entry into a computer system

• Password protecting a file

• A method of catching a cyber criminal

What is plaintext?

• Plaintext is the understandable, readable version of a message

• Plaintext is an encrypted message

• Plaintext is a form of encryption

• Plaintext is a message with one colour

What is ciphertext?

• Ciphertext is the understandable, readable version of a message

• Ciphertext is encrypted plaintext

• Ciphertext is a message that has been decrypted

• Ciphertext is text created by a group of people

What protocol is used to encrypt sensitive data like credit card information on the internet?

• HTTPS

• TCP/IP

• POP3

• IMAP

What is the Caesar cipher?

• A simple encryption method that involves replacing each letter in a message with one ahead or behind in the alphabet

• A complex encryption method using two keys

• A way of password protecting a file

• A randomisation of letters, unreadable by anyone without the key

What is the ciphertext for "computer science" when a Caesar cipher with a key value of +3 is used?

• eqorwvgt uekgpeg

• frpsxwhu vflhqfh

• iusvazkx yioktik

• nfkspcla fequcks

What is the key value in this encrypted message - lipps asvph?

• +6

• -4

• +4

• -6

What is a network protocol?

• 
  Lets you connect to a device

• Agreed way of sending emails on a network

• 
  Agreed method of communication across a network

• 
  Agreed way of checking files for errors

Which protocol is responsible for transferring computer files between client and server on a computer network?

• SMTP

• 
  TCP/IP

• 
  FTP

• 
  

  HTTP

A protocol that downloads emails onto a client computer and removes the mail message from the mail server.

• SMTP

• 
  POP

• 
  SFTP

• 
  HTTPS