CISCO Cyberops Security Fundamentals Section 01: TCP/IP Protocol Suite (Q 11-20)

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  • 1/10 Questions

    How many bits does an IPv4 address have?

    • 16
    • 32
    • 48
    • 64
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About This Quiz

This quiz, part of Cisco CyberOps Security Fundamentals, covers key aspects of the TCP\/IP Protocol Suite, focusing on IPv4 addressing. It tests knowledge on bits in IPv4 addresses, subnet masks, IP classes, and maximum host calculations, essential for network design and security.

IP Addressing Quizzes & Trivia

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  • 2. 

    What is the maximum value that can be represented in any octet of an IP address or subnet mask?

    • 126

    • 255

    • 256

    • 128

    Correct Answer
    A. 255
    Explanation
    The maximum value that can be represented in any octet of an IP address or subnet mask is 255. In binary, an octet consists of 8 bits, and the highest value that can be represented with 8 bits is 11111111, which is equivalent to 255 in decimal notation. This value represents the maximum range of possible values for an octet in an IP address or subnet mask.

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  • 3. 

    Which ​IP address can be used by a host to establish an IP connection to itself for testing purposes?

    • 127.0.0.1

    • 1.1.1.1

    • 0.0.0.0

    • 255.255.255.255

    Correct Answer
    A. 127.0.0.1
    Explanation
    The IP address 127.0.0.1 is known as the loopback address and is used by a host to establish an IP connection to itself for testing purposes. It is often referred to as the localhost address and is commonly used in network diagnostics and troubleshooting. When a host sends a packet to the loopback address, it is immediately returned back to the host without being sent over the network. This allows the host to test network functionality without the need for an external network connection.

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  • 4. 

    Which one of the following subnet masks is equivalent to the /26 prefix?

    • 255.255.192.0

    • 255.255.255.128

    • 255.255.255.192

    • 255.255.255.248

    Correct Answer
    A. 255.255.255.192
    Explanation
    The /26 prefix represents a subnet mask that has 26 bits set to 1 and the remaining bits set to 0. In binary, this would be 11111111.11111111.11111111.11000000, which is equivalent to the decimal subnet mask 255.255.255.192.

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  • 5. 

    To what class of IP address does the address 172.16.1.10 belong?

    • Class A address

    • Class B address

    • Class D address

    • Class C address

    Correct Answer
    A. Class B address
    Explanation
    The address 172.16.1.10 belongs to the Class B address. In Classful IP addressing, Class B addresses have the first two octets reserved for the network portion, while the last two octets are used for host addressing. The range of Class B addresses is from 128.0.0.0 to 191.255.255.255, and they are commonly used for medium to large-sized networks.

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  • 6. 

    Which one of the following options is the mechanism that identifies the separation point of network addressing and host addressing?

    • The dotted decimal notation

    • The subnet mask

    • The wildcard mask

    • The partial mask

    Correct Answer
    A. The subnet mask
    Explanation
    The subnet mask is the mechanism that identifies the separation point of network addressing and host addressing. It is a 32-bit value that is used to divide an IP address into network and host portions. The subnet mask determines which bits in the IP address represent the network address and which bits represent the host address. By comparing the IP address and the subnet mask, a device can determine whether a destination IP address is on the same network or a different network, allowing for proper routing of network traffic.

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  • 7. 

    What is the maximum number of hosts that a Class B network can have?

    • 254

    • 32,766

    • 65,534

    • 16,777,214

    Correct Answer
    A. 65,534
    Explanation
    A Class B network has a subnet mask of 255.255.0.0, which means that it can have a maximum of 65,534 hosts. The first and last IP addresses in the range are reserved for network and broadcast addresses respectively, leaving 65,534 usable hosts.

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  • 8. 

    The IP address 191.168.0.252 belongs to which class of IP addresses?

    • Class A

    • Class B

    • Class C

    • Unclassified

    Correct Answer
    A. Class B
    Explanation
    The IP address 191.168.0.252 belongs to Class B of IP addresses. In Class B, the first two octets are used to identify the network, while the remaining two octets are used to identify the host. The range of Class B IP addresses is from 128.0.0.0 to 191.255.255.255, and they are typically assigned to medium-sized networks.

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  • 9. 

    What range of IP addresses are usually assigned to hosts that fail to obtain an IP address via DHCP?

    • 0.0/8

    • 127.0/8

    • 169.254/16

    • 192.168.0/24

    Correct Answer
    A. 169.254/16
    Explanation
    When a host fails to obtain an IP address via DHCP, it typically assigns itself an Automatic Private IP Address (APIPA) in the range of 169.254/16. This range is reserved for link-local addressing, meaning it is used for communication within a single network segment and is not routed across different networks. APIPA addresses are automatically generated by the host and are not managed by a DHCP server.

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  • 10. 

    What determines that class of an IP address?

    • The number of bits in the host field

    • The subnet mask

    • The most significant bit (MSB) pattern

    • The third octet

    Correct Answer
    A. The most significant bit (MSB) pattern
    Explanation
    The class of an IP address is determined by the most significant bit (MSB) pattern. The MSB pattern indicates the range of IP addresses that belong to a particular class. The MSB pattern can be used to identify whether an IP address belongs to Class A, Class B, Class C, Class D, or Class E. Each class has a different range of IP addresses, and the MSB pattern helps in identifying the class to which an IP address belongs.

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 26, 2017
    Quiz Created by
    Paranormalrob
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