Subnetting Practice Exercises 1: What Is The Block Size?

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Subnetting Practice Exercises : 1. For a /26: What is the block size: How many usable hosts does the subnet have: What is the subnet mask for the last octet: How many subnets of this size are possible in a class C: Write the last netmask octet in binary: 2. For a /30: What is the block size: How many usable hosts does the subnet have: What is the subnet mask for the last octet: How many subnets of this size are possible in a class C: Write the last netmask octet in binary: 3. IP address: 192.168.1.0 Netmask or slash notation: /30 Address: Broadcast: Netmask: Slash: First Usable Host: Last Usable Host: Usable Hosts: 4. IP address: 192.250.8.16 Netmask or slash notation: /28 Address: Broadcast: Netmask: Slash: First Usable Host: Last Usable Host: Usable Hosts: 5. IP address: 192.240.4.32 Netmask or slash notation: /26 Address: Broadcast: Netmask: Slash: First Usable Host: Last Usable Host: Usable Hosts: 6. What is the maximum number of valid hosts one will have from the network 192.168.49.0 255.255.255.192 Answer: 7. What is the subnet mask in use in this network? VLAN A – 30 hosts – 192.168.9.30 VLAN B – 15 hosts – 192.168.9.61 Answer: 8. What is the subnet mask in use in this network? VLAN A – 1 host – 192.168.207.1 VLAN B – 2 hosts – 192.168.207.6 Answer: 9. How many usable subnets do you have when using a subnet mask of 255.255.255.240 on Network ID 201.114.168? Answer: 10. You are given Network ID 222.72.157 with a subnet mask of 255.255.255.248 to setup. How many subnets and hosts will you have? Answer:

Paper For Above instruction

Subnetting is a fundamental concept in network design that allows network administrators to efficiently allocate IP address space within a network. It involves dividing a large network into smaller, manageable subnetworks or subnets, which enhances routing efficiency, security, and IP address utilization. This paper addresses practical subnetting exercises, exploring subnet size, number of hosts, subnet masks, and binary representations for different subnet scenarios, focusing particularly on class C networks.

To comprehend subnetting, it is essential to understand key concepts such as subnet masks, block sizes, usable hosts, and subnetting in classful networks. The subnet mask determines which portion of an IP address designates the network and host parts. For example, a /26 or 255.255.255.192 mask assigns 26 bits to the network and 6 bits for hosts, affecting the number of subnets and hosts possible. Similarly, a /30 or 255.255.255.252 mask provides fewer hosts but increases subnet granularity.

Subnetting Calculations for /26 and /30

In a /26 subnet, the subnet mask in dotted-decimal notation is 255.255.255.192. Here, the block size can be calculated by the formula 256 - subnet mask value in last octet. For /26, this is 256 - 192 = 64. The subnet blocks, therefore, are divided every 64 addresses. The number of usable hosts per subnet is 2^(32-26) - 2, which equals 62, accounting for the network and broadcast addresses.

In a /30 subnet, the subnet mask is 255.255.255.252. The block size is 256 - 252 = 4, which indicates that subnets are created in sizes of 4 addresses. The usable hosts per subnet are 2^(32-30) - 2, resulting in 2 hosts, suitable for point-to-point links.

Subnetting Examples with Specified IPs

For the IP address 192.168.1.0 with a /30 mask, the network, broadcast, and usable host addresses can be determined. The network address is 192.168.1.0, the broadcast address is 192.168.1.3, with usable hosts being 192.168.1.1 and 192.168.1.2. The same logic applies to other IP addresses, such as 192.250.8.16/28, where the subnet mask is 255.255.255.240, those subnets have 14 usable hosts, and the network and broadcast addresses are calculated accordingly.

Maximum Hosts and Subnet Calculations

The maximum number of valid hosts in a network like 192.168.49.0 with a 255.255.255.192 mask is 62, because the 192.168.49.0/26 subnet provides 64 addresses, subtracting network and broadcast addresses.

Subnet masks for VLANs configured for specific hosts, such as VLAN A with 30 hosts and VLAN B with 15 hosts, are derived based on their host requirements. For example, a /27 mask (255.255.255.224) supports 30 hosts, while a /28 (255.255.255.240) supports 14 hosts, which aligns with the requirements specified.

When assigning subnets to network IDs like 201.114.168 or 222.72.157, the calculations involve determining how many subnets are available based on the subnet mask, and how many hosts fit into each subnet. For 255.255.255.240, the network supports 16 subnets, each with 14 usable hosts, while for 255.255.255.248, the network supports 32 subnets with 6 hosts each.

Conclusion

Effective subnetting requires comprehension of subnet masks, binary calculations, and understanding network requirements. Accurate subnetting facilitates optimized IP address management, enhances network security, and reduces routing complexity. The exercises reviewed demonstrate fundamental subnetting principles crucial to network design and administration.

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