Basics of IP Addressing

 

#cybersecurity #coursera #quiz #solution #network  

Coursera quiz solution

1.

Question 1

The binary (base 2) number "0101" is how much in decimal (base 10)?

1 / 1 point

9

1

5

3

Correct

Correct, 5

2.

Question 2

The IP address range goes from 0.0.0.0 to 255.255.255.255 and is known as the "four octets". Why are these 4 numbers called octets?

1 / 1 point

The inventor noted the similarity to the "octives" in piano music.

They form a total of 8 subranges.

The number 255 in decimal takes up 8 digits in binary.

This was the eighth version of the IP address range to be adopted by the Internet Standards Committee (and the first to gain widespread acceptance.)

Correct

Correct, it takes up 8 digits in binary.

3.

Question 3

How many octets are used to define the network portion of the IP address in a Class C network?

1 / 1 point

0

1

2

3

Correct

Correct, 3 octets.

4.

Question 4

True or False: A routable protocol is a protocol whose packets may leave your network, pass through your router, and be delivered to a remote network.

1 / 1 point

True

False

Correct

Correct, A routable protocol is a protocol whose packets may leave your network, pass through your router, and be delivered to a remote network.

5.

Question 5

True or False: The destination address is defined in the packet header but the source address is in the packet footer.

1 / 1 point

True

False

Correct

Correct, True or False: The destination address is not defined in the packet header but the source address is in the packet footer.

6.

Question 6

Which network mask belongs to a Class A network?

1 / 1 point

255.255.255.0

255.255.255.255

0.0.0.0

255.0.0.0

Correct

Correct, network mask of a Class A network

7.

Question 7

IPv6 changes the IP address from a 32 bit address used in IPv4 to a 128 bit address. This results in which of the following?

1 / 1 point

Many billions of times as many possible IP addresses.

The same number of possible IP addresses, but expressed with greater precision.

Four times as many possible IP addresses.

The same number of possible host addresses but many more network addresses.

Correct

Correct, many billions of times as many IP addresses.

8.

Question 8

Which IPv4 addressing schema would you use to send a message to select group systems on the network?

1 / 1 point

Simulcast

Multicast

Unicast

Broadcast

Correct

Correct

Python for Initial Access

 #cybersecurity #coursera #quiz #solution #network 

1.

Question 1

TRUE or FALSE: The Initial Access stage is always the first time that an attacker interacts with a target's systems.

1 / 1 point

False

True

Correct

An attacker may interact with target systems during Reconnaissance as well.

2.

Question 2

TRUE or FALSE: The Initial Access stage can blur into other stages of the attack life cycle.

1 / 1 point

False

True

Correct

Attacks like SQL injection may incorporate several stages into a single step.

3.

Question 3

Which of the following are techniques for initial access? Choose all that apply.

1 / 1 point

External Remote Services

Correct

External Remote Services, Hardware Additions and Supply Chain Compromise are Techniques for initial access.

Hardware Additions

Correct

Supply Chain Compromise

Correct

Hijack Execution Flow

4.

Question 4

Why is USB autorun not always a viable infection vector for Windows?

0 / 1 point

Autorun is disabled by default in Windows 10

Autorun is always a viable attack vector

Autorun is a Linux concept

Not all Windows versions support Autorun

Incorrect

5.

Question 5

Which of the following is an initial access Technique that bypasses many organizations' defenses?

1 / 1 point

Drive-by Compromise

Replication Through Removable Media

Phishing

Exploit Public-Facing Application

Correct

Removable media bypasses perimeter-based and network-level defenses.

6.

Question 6

TRUE or FALSE: Valid accounts are a relatively easy attack vector for an attacker to exploit.

1 / 1 point

True

False

Correct

User credentials can be compromised in many ways, providing an attacker access to a valid user account.