Subnetting and VLSM Quiz - Class C
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Questions and Answers

What is the maximum number of networks that can be created from a Class C network with a /27 subnet?

  • 32 networks
  • 8 networks (correct)
  • 4 networks
  • 16 networks

What is the subnet mask used for a network that requires at least 60 hosts?

  • 255.255.255.224
  • 255.255.255.192 (correct)
  • 255.255.255.128
  • 255.255.255.0

What is the broadcast address for the network assigned to the Operations office?

  • 199.10.10.222 (correct)
  • 199.10.10.191
  • 199.10.10.255
  • 199.10.10.210

If Marketing needs 8 hosts, which subnetting option would be suitable for them?

<p>Use a /28 subnet mask (C)</p> Signup and view all the answers

Which of the following represents the correct IP range assigned to the Accounting office?

<p>199.10.10.17 - 199.10.10.26 (D)</p> Signup and view all the answers

What is the subnet mask for a Class C network with a /25 prefix?

<p>255.255.255.128 (B)</p> Signup and view all the answers

How many hosts can be supported in a Class C /27 subnet?

<p>32 (D)</p> Signup and view all the answers

What is the number of networks that can be created from a Class C network with a /25 subnet?

<p>2 (A)</p> Signup and view all the answers

What is the Network ID (NID) for the first subnet of 200.100.100.0 /27?

<p>200.100.100.0 (D)</p> Signup and view all the answers

What would be the broadcast address (BID) for the second subnet of a Class C network with a prefix of /25?

<p>192.168.1.127 (C)</p> Signup and view all the answers

In a Class C subnet, what is the formula used to calculate the number of hosts per network based on remaining zero bits?

<p>2^n - 2 (D)</p> Signup and view all the answers

For a network identified as 200.100.100.0 /26, how many hosts can be accommodated?

<p>64 (C)</p> Signup and view all the answers

What is the IP range for the first subnet in a Class C /25 network?

<p>192.168.1.0 - 192.168.1.127 (C)</p> Signup and view all the answers

What is the subnet mask for the given network 192.168.1.0 /27?

<p>255.255.255.224 (C)</p> Signup and view all the answers

How many hosts per network can be created with a subnet mask of 255.255.255.224?

<p>30 hosts (A)</p> Signup and view all the answers

If the total Class C network is 256 and the calculated hosts per network is 64, how many networks can be created?

<p>4 networks (D)</p> Signup and view all the answers

Which of the following IP address ranges corresponds to the Accounting network according to the provided data?

<p>199.10.10.1 - 199.10.10.62 (C)</p> Signup and view all the answers

What is the subnet mask for a Class B network given as 130.100.0.0 /17?

<p>255.255.128.0 (B)</p> Signup and view all the answers

For a /17 subnet mask, how many hosts can be supported per network?

<p>32768 hosts (B)</p> Signup and view all the answers

In the provided network configuration, which network is assigned to Operations?

<p>199.10.10.128 - 199.10.10.190 (B)</p> Signup and view all the answers

How many bits are used for hosts in a /27 subnet?

<p>5 bits (A)</p> Signup and view all the answers

What is the subnet mask for the given configuration of 128 64 32 16 8 4 2 1?

<p>255.255.255.224 (A)</p> Signup and view all the answers

How many hosts can be accommodated in each subnet for the calculation where /19 is used?

<p>8192 hosts (B)</p> Signup and view all the answers

What is the number of networks that can be created with a subnet mask of /17 in a Class B subnet?

<p>2 (C)</p> Signup and view all the answers

What is the correct broadcast address for the second subnet starting with 192.168.1.32?

<p>192.168.1.63 (B)</p> Signup and view all the answers

Which of the following represents the network identifier (NID) for the fourth subnet in a Class C subnet with the mentioned details?

<p>192.168.1.96 (C)</p> Signup and view all the answers

What is the range of IP addresses for the first subnet of a Class B network indicated by 130.100.0.0?

<p>130.100.0.1 - 130.100.127.254 (B)</p> Signup and view all the answers

How many total Class B hosts are available if subnetted with a /17 mask?

<p>65536 (A)</p> Signup and view all the answers

What is the calculated subnet mask for a Class B network with a /19 designation?

<p>255.255.224.0 (A)</p> Signup and view all the answers

What is the subnet mask for the given Class A network 10.0.0.0 /10?

<p>255.192.0.0 (D)</p> Signup and view all the answers

How many hosts can each subnet support in a Class A network with a subnet mask of /10?

<p>4,194,304 (A)</p> Signup and view all the answers

What is the total number of networks that can be created from a Class B network with 16,777,216 total hosts divided by 4,194,304 hosts per network?

<p>4 (D)</p> Signup and view all the answers

In the given example, what is the NID for the first subnet if the interval is 64?

<p>10.0.0.0 (B)</p> Signup and view all the answers

What does VLSM stand for in networking terms?

<p>Variable Length Subnet Mask (A)</p> Signup and view all the answers

When dividing a network, what is the primary advantage of using VLSM compared to traditional subnetting?

<p>Efficient use of IP addresses (A)</p> Signup and view all the answers

Which office requires the largest subnet size in the given example?

<p>Operations (C)</p> Signup and view all the answers

How many networks can be created with a /19 subnet?

<p>8 (A)</p> Signup and view all the answers

If the total number of available Class C hosts is 256, how many subnets can be created to accommodate the following offices: Accounting (10 hosts), Marketing (8 hosts), Operations (60 hosts)?

<p>3 (B)</p> Signup and view all the answers

In a /17 subnet, what is the calculated number of hosts per network?

<p>16,384 (B)</p> Signup and view all the answers

What is the NID for the first subnet in the /17 configuration provided?

<p>190.0.0.0 (A)</p> Signup and view all the answers

What subnet mask corresponds to the highest number of hosts required by Queensland, which needs 16.3K hosts?

<p>255.255.192.0 (B)</p> Signup and view all the answers

What is the Bid for the fourth subnet in the /17 configuration?

<p>55 (D)</p> Signup and view all the answers

Which IP range is assigned to the second subnet in the /17 configuration?

<p>190.0.32.1 to 190.0.63.254 (D)</p> Signup and view all the answers

How is the interval per network calculated for Perth in the provided configuration?

<p>256 / 4 (B)</p> Signup and view all the answers

What is the correct IP range for the first subnet assigned to Perth?

<p>130.255.0.0 to 130.255.63.254 (B)</p> Signup and view all the answers

Flashcards

Subnetting

Dividing a large network into smaller networks, assigning a fixed number of hosts per network, using Layer 3 IP addressing.

Class C Subnet /25

A Class C network divided into two subnets. Subnet mask of 255.255.255.128.

Hosts per /25 Subnet

128 hosts in each subnet.

Number of networks /25

2 subnets for a /25 subnet.

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Subnet Mask /26

A subnet mask with 26 bits in the network portion.

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Hosts per /26 Subnet

64 hosts in each subnet

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Subnet Mask /27

A subnet mask with 27 bits in the network portion.

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Hosts per /27 Subnet

32 hosts in each subnet

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Calculating Networks (/27)

To find the number of networks that can be created from a Class C IP address block (/27), divide the total number of hosts in a Class C network (256) by the number of hosts per network (32).

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Subnet Mask for /27

The subnet mask will have the structure determined by /27. /27 means that 27 bits are used for the network part and the remaining bits (5) will control the host part of the IP address.

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IP Address Block Example

The example shows how to divide a Class C network (199.10.10.0) into multiple subnetworks by assigning network IDs, IP ranges for devices, and Broadcast IDs.

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Determining Subnetwork Requirements

Analyze the requirements of each department (Accounting, Marketing, Operations) to decide which will need the most hosts and will need the largest network segment.

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Class C Network Divisions

Class C IP address blocks such as 199.10.10.0 can be divided into smaller networks according to the number of hosts needed for each office. The subnetworks are identified using IP address range and Broadcast ID.

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Subnet Mask Calculation (/27)

Determines the network address and host address portions of an IP address.

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Hosts per Network (/27)

Calculates the maximum number of devices supported on a subnet.

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Networks from a Class C (/27)

Determines the number of unique networks that can be created from a Class C network.

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NID for Accounting (5th Network)

Network ID for subnet where Accounting is located.

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Network Assignment for Operations (3rd Network)

Determine the network ID for Operations in a subnetwork division.

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Class B Subnet Calculation

Method to divide a Class B network into smaller subnetworks.

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Hosts for /17

Determine the total possible hosts supported within a /17 subnet.

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Subnet Mask (Example)

A 32-bit value that divides an IP address into network and host sections, defining the subnet.

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IP Address Parts

An IP address is divided into network ID (NID) and host ID (HID). The subnet mask determines the boundary between them.

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Network ID (NID) calculation

The portion of an IP address that identifies a specific network. Determined by the subnet mask.

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Hosts per Network Calculation

Determine the number of usable host addresses within a subnet by finding the number of remaining 0s in the subnet mask, and then calculating 2^n where n is the number of 0s in the mask.

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Subnet Mask (192.168.1.0 /24)

Example of a subnet mask in dotted decimal notation, specifying a network (/24 = 24 bits for the network).

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Class B Subnet

A network using Class B addressing method, which uses a /16 subnet mask by default, potentially having a large number of possible hosts.

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Network Calculation (/17)

Calculate number of networks from a /17 subnet mask.

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Calculating Hosts (/19)

Calculating the number of possible hosts using a /19 subnet mask.

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Class A Subnet Mask Calculation

To determine the subnet mask for a /10 network, the first two octets are dedicated to the network portion. This translates to 255.192.0.0 as the subnet mask.

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Number of Hosts per Network (/10)

A /10 subnet has 222 (4,194,304) possible host addresses available. However, two addresses are reserved for network and broadcast.

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Network Division with VLSM

Variable Length Subnet Mask (VLSM) divides a large network into multiple subnets of varying sizes, allowing for efficient allocation of IP addresses based on each network's specific host requirements.

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Identifying the Office with Most Hosts

To apply VLSM effectively, first analyze the number of hosts needed by each office. The office with the highest host requirement will necessitate the largest subnet.

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Class C Subnet Mask for /25

A /25 subnet mask in a Class C network is 255.255.255.128. This means 25 bits are used for the network portion and 7 for the host portion.

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Calculate Hosts per Network (/25)

A /25 network has 27 (128) possible host addresses available. However, two addresses are reserved for network and broadcast.

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What is the number of networks created in a /19 subnet?

In a /19 subnet, there are 8 networks. This is calculated by dividing the total Class B hosts (65,536) by the number of hosts per /19 subnet (8,192).

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What is the number of networks in a /17 subnet?

A /17 subnet has 4 networks. This is calculated by dividing the total number of Class B hosts (65,536) by the number of hosts per /17 subnet (16,384).

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NID (Network ID) for /17

The first 17 bits of an IP address in a /17 subnet define the network ID. This determines which network the address belongs to.

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IP Range for /17

The IP range for a /17 subnet starts from the network ID and extends to the last possible address before the next network ID.

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BID (Broadcast ID) for /17

The Broadcast ID for a /17 subnet is the last address within the subnet's range. It is used for broadcasting messages to all hosts on that network.

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Subnet Mask (/19)

A subnet mask that uses 19 bits for the network portion and 13 bits for the host portion.

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Study Notes

Subnetting and VLSM

  • Subnetting is a process used to divide a large network into smaller networks with a fixed number of hosts per network. It utilizes Layer 3 IP addressing.
  • Subnetting can be applied to Class A, B, and C networks.
  • VLSM (variable length subnet mask) allows for subnets of different sizes within the same network.

Class C Subnet

  • Example 1: Network 192.168.1.0/25

  • Requirements:

    • Calculate subnet mask. The subnet mask for /25 is 255.255.255.128
    • Calculate hosts per network. The calculation for /25 is 2⁷= 128 hosts per network.
    • Calculate networks. Calculation for /25 is 2¹ =2 networks.
    • Determine NID, IP range, and BID. Information for these aspects is provided in the image.

  • Example 2: Network 192.168.1.0/26

  • Requirements:

  • Calculate subnet mask . The subnet mask for /26 is 255.255.255.192.

  • Calculate hosts per network. The calculation for /26 is 2⁶ = 64 hosts per network.

  • Calculate networks. Calculation for /26 is 2² = 4 networks..

  • Determine NID, IP range, and BID. Information about these is in the image.

  • Example 3: Network 199.10.10.0/27

  • Requirements:

  • Calculate subnet mask: 255.255.255.224

  • Calculate number of hosts per network: 32

  • Calculate number of networks that can be created: 8

  • Determine the NID,IP range, and BID per respective network in this image.

Class B Subnet

  • Example 1: Network 130.100.0.0/17

  • Requirements:

  • Calculate subnet mask: 255.255.128.0

  • Calculate number of hosts per network: 32768

  • Calculate number of networks: 2

  • Determine the NID, IP range, and BID for each of the networks

  • Example 2: Network 190.0.0.0 /19

  • Requirements:

  • Calculate subnet mask: 255.255.224.0

  • Calculate number of hosts per network: 8192

  • Calculate the number of networks: 8.

  • Determine the NID, IP range, and BID for each respective network.

Class A Subnet

  • Example 1: Network 10.0.0.0/10
  • Requirements:
  • Calculate subnet mask. The subnet mask for /10 is 255.192.0.0
  • Calculate the number of hosts - 4194304 hosts per network.
  • Calculate the number of networks: 4
  • Determine the NID, IP range, and BID for each respective network.

VLSM (Variable Length Subnet Mask)

  • VLSM is a method of dividing networks into subnets of different sizes as needed. This is in contrast to subnetting techniques that assign subnets fixed sizes.

Subnetting vs. VLSM

  • Subnetting divides a network into smaller subnets with fixed host numbers.
  • VLSM (Variable Length Subnet Masking) divides networks into smaller subnets with variable host numbers. Subnets can have differences in size as needed.

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Subnetting and VLSM PDF

Description

Test your knowledge on subnetting and VLSM with this quiz focused on Class C networks. Engage with questions that cover subnet masks, hosts per network, and network identification. Perfect for understanding IP addressing concepts in computer networks.

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