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WorksheetsCybersecurity Intro
Total questions: 45
Worksheet time: 43mins
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
What is the decimal value of the binary number: 101100
13
88
44
None of the above
Give one type of malware
(a)
What is the difference between IPV4 and IPV6?
What is the primary difference between TCP and UDP?
UDP just sends in a stream while TCP needs confirmation of receipt or resends
UDP is under the flow while TCP is on top
TCP is the transmission level of OSI while UDP is the application level
TCP is the transmission level of OSI while UDP is the presentation layer
If the network mask is written with a /21 this means
the first 21 bits are used to tell the machine address
the first 21 bits are used to tell the network address
the last 21 bits are used to tell the network address
the last 21 bits are used to tell the machine address
If the network mask has a /18 what is the network address?
255.255.192.192
255.255.291.0
255.255.255.0
none of the options given
What is the purpose of the Diffie-Helman Crypto System
Pass a message using a private key
To create a key that only the sender and receiver know
To create a public key in such a way that the two parties creating the key can encode & decode
To pass a message using a public key
Give 3 qualities of a good hashing function:
1) fast to perform
2) can't get back to the original from the hash
3) has a private key
1) fast to perform
2) can't get back to the original from the hash
3) doesn't cause collisions
1) Has a public key
2) can't get back to the original from the hash
3) doesn't cause collisions
1) Is based on prime numbers
2) creates a message that is longer than the original
3) has controled collisions
In the AIC (or CIA) triad, what does the A stand for?
Accountability
Authentication
Availability
Augmentation
Which type of network topology may need a token system to control communication?
star
Internet
Intranet
ring
What is the purpose of a port number in networking?
How many bits is an IPV4 address?
40
32
64
none of the above
What layer of the OSI model do routers exist on?
Transport
Link
Network
Physical
What is the multiplicative inverse of 5 (mod 11)?
45
7
9
3
In the affine cipher, if you used a=3 and b=7 when your aphabet size was 27, then what would you use for a-1 ?
2
19
14
None of these would work
What is the reason steganogrphy of a message in a picture can work without making the file larger?
Every other pixel is replaced by part of the message
Every third bit of the picture is replaced by the message
The highest order bits of the picture are replaced with the message.
None of the above
When a hacker gets false information into the internet's addressing system it is known as
IP address translation
DNS poisoning
Hash Salting
None of the above
Give one of the four stages of the NIST framework for Incident Response:
(a)
What does NICE stand for?
Non-intended cyber exchange
National Initiative for Cybersecurity Education
National Institute for Cyber Exchange
None of the above
What are KSA's
(a)
What is it called when a network uses a set of protocols only known by a select groups of people and their machines?
Proprietaary Network
Intra-net
Inter-net
Open Network
Each device on the internet has a permanent and unique identifier, this is called its
IP address
Network Mask
MAC address
none of the above
How does a router know where to send a packet?
The router's IP address
The routering table
The DNS
none of the above
What are the steps of TCP's 3-way handshake?
Syn, Ack, Syn-Ack
Syn-Ack, Syn, Ack
Syn, Syn-Ack, Ack
Syn, Ack, Syn
Describe the Client/Server model
When DNS stores recent look-ups, they get stored in the
cache
routing table
DNS authoritative server
DNS recursor server
What command can you use to find who owns a specific IP address?
whois
traceroute
ping
none of the above
What is "whaling"?
brute force password cracking
a type of virus
a form of social engineering attack
a form of cryptojacking
One example of a "code" used in cryptology is
IP addresses
Diffie-Helman
Navajo Code Walkers
Pigpen Cipher
Describe the parts of defense: Layering, Limiting, Diversity, Obscurity, and Simplicity
(this wouldn't all be one question on the exam)
Describe the steps of an attack: Reconnaissance, Weaponization, Delivery, Exploitation, Installation, Command & Control, and Action & Objectives
(again this wouldn't be all one question)
Describe different types of Agents: Cyber Criminals, Script Kiddies, Brokers, Insiders, Cyber Terrorists, Hactivists, and State Sponsored Attackers
Describe how TCP handles large messages: Creating Packets, Addressing, Receipt Confirmation, Resending, Reassembly
Describe what output you get from the ping command.
Describe what output you get from the traceroute or tracert command.
