Cybersecurity Intro

Two values are considered co-prime if and only if ...

• Neither number is a multiple of the other.

• They are each prime but have different values.

• They have at least one prime factor in common.

• They do not have any prime factors in common.

Listed are some of the layers of the OSI model, which represents a correct ordering of those levels?

• Application - Network - Transport -

• Session - Application -

  Link -

• Application - Transport -

  Physical -

• Application -

  Presentation -

  Session -

Using the key on the right, what is the correct cipher text of the word WORDS?

• 
• 
• 
• 

What does a DNS do for you?

• Looks up in a table to give you an IP address associated with a machine name you type in the URL.

• Calculates the IP address by using the network mask.

• Figures out the correct machine name by using masking of the IP address.

• Determines what part of the IP address corresponds to the network and which part to the machine.

What does TCP stand for?

• Training Communications

  Protocol

• Transmission

  Communication

  Prompt

• Traveling

  Camputation

  Processes

• Transmission Control Protocol

For what purpose would you use the ping command?

• To test the volume of a sound file.

• To find the route a packet takes.

• To determine if a machine is available and responding

• To find the number of routers (hops) between two computers

What is the purpose of a router?

• To connect 2 (or more) networks to each other

• To verify the sender on all packets

• To verify that the packet has the correct hash

• To determine the size of the packet

In the affine cipher - the formula is

c=ap+b (mod m)

What does the m represent

• The private key

• The public key

• The multiplicative inverse

• The size of the alphabet

What does the term masking mean (when applied to networking and cybersecurity)?

• The hiding of information by obscuring it

• Dividing the bits of the IP address into the network and machine portions

• Hiding the actual IP address by using a name instead

• protecting the machine from a virus

In the Affine cipher formula c=ap+b (mod m)

what does the p refer to?

• The public key

• The private key

• The power it is raised to

• The numeric value of the plain text character