CNT 125 Online - Subnet Planning Lab

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Harrisburg Area Community College *

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125

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Computer Science

Date

Feb 20, 2024

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docx

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3

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CNT 125 Online - Subnet Planning Lab Created By: D. Brown CNT 125 Online – Subnet Planning Lab Background: A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of creating subnetworks is called subnetting. All computers that belong to a subnet are addressed with a common, identical, most-significant bit-group in their IP address. This part of the address is known as the routing prefix or network number. The size of the routing prefix may be indicated using CIDR notation or through specification of a subnet mask. In order to achieve the correct number of subnets when subnetting, some planning is necessary to correctly manipulate the “borrowed bits” to achieve the correct number of usable subnets. Learning Outcomes : Upon successful completion of the course the student will be able to: Implement a subnetted TCP/IP network using routers and switches Directions: 1. Download a copy of this lab to your PC 2. Either …. Print out a copy so you write on the page … or … Type into the copy of the lab (feel free to use a colored font or highlighting to help your work to stand out) to complete the lab 3. Use the Podcasts available on D2L with this lab to aid in completing the lab. Part A: Using the given network # and subnet mask – correctly calculate the number of borrowed bits, the number of subnets and the number of usable hosts/subnet created for the given network. (Use the Podcasts available on D2L to assist with completing this Lab) IP Address from Network What Class SNM Bit Count SNM – Dotted Decimal # Bits Borrowed # of SN Created (2 # of Borrowed Bits ) # of Addresses/SN ( 2 # of Remaining Bits ) # of Usable ( 2 # of Remaining Bits – 2 ) Ex 195.60.123.23 C /28 255.255.255.240 4 2 4 = 16 Subnets 2 4 = 16 Addresses/SN 2 4 = 16 – 2 = 14 Usable Hosts/SN 1 210.34.27.2 C /30 255.255.255.252 6 2^6= 64 Sn 2^2= 4 Add Sn 2 2 220.53.230.25 C /29 255.255.255.248 5 2^5= 32 Sn 2^3= 8 Add Sn 6 3 199.52.1.25 C /27 255.255.255.224 3 2^3= 8 Sn 2^5= 32 Add Sn 30 4 191.82.167.3 B /24 255.255.255.0 8 2^8= 256 Sn 2^8= 256 Add Sn 254 5 131.200.25.73 B /20 255.255.240.0 4 2^4= 16 Sn 2^12= 4096 Add Sn 4094 6 10.50.24.32 A /12 255.255.255.252 4 2^4= 16 Sn 2^20= 1048576 Add Sn 1048574 7 120.50.32.120 A /16 255.0.0.0 Part B: Using the given network # and details of required # of Subnets or Hosts per Subnet – correctly create the subnet mask to accommodate this networks need. (Use the Podcasts available on D2L to assist with completing this Lab)
CNT 125 Online - Subnet Planning Lab Created By: D. Brown IP Address from Network What Class SNM Bit Count SNM – Dotted Decimal # Bits Borrowed # of SN Created (2 # of Borrowed Bits ) # of Addresses/SN ( 2 # of Remaining Bits ) # of Usable ( 2 # of Remaining Bits – 2 ) Ex 198.50.127.129 C /27 255.255.255.224 3 8 Subnets Needed 2 5 = 32 Addresses/SN 2 5 = 32 – 2 = 30 Usable Hosts/SN 1 220.49.217.29 C /28 255.255.255.240 4 16 Subnets Needed 2^4 = 16 Add/Sn 14 Usable/Sn 2 222.59.210.83 C /26 255.255.255.192 2 3 Subnets Needed 2^6= 64 Add/Sn 62 Useable/Sn 3 223.200.99.183 C /27 255.255.255.224 3 2^3 = 8 Sn 2^5 = 32 Add/Sn 30 Usable Hosts/SN Needed 4 191.27.176.39 B /23 255.255.254.0 7 100 Subnets Needed 2^9 = 512 Add/Sn 510 Useable/Sn 5 132.207.226.37 B /24 255.255.255.0 8 200 Subnets Needed 2^8 = 256 Add/Sn 254 Useable/Sn 6 128.18.2.10 B /22 255.255.252.0 6 2^6 = 64 Sn 2^10= 1024 Add/Sn 1000 Usable Hosts/SN Needed 7 100.70.240.42 A /18 255.255.192.0 10 1000 Subnets Needed 2^14= 16384 Add/Sn 16382 Useable/Sn 8 125.55.35.125 A /8 255.255.240.0 12 2^12 = 4096 Sn 2^12= 4096 Add/Sn 4000 Usable Hosts/SN Needed Class of Network First Octet Network & Host Octets Default Subnet Mask A 0 - 126 N H H H 255.0.0.0 B 128 - 191 N N H H 255.255.0.0 C 192 - 223 N N N H 255.255.255.0 2 20 2 19 2 18 2 17 2 16 2 15 2 14 2 13 2 12 2 11 2 10 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 1048576 524288 262144 131072 65536 32768 1638 4 8192 4096 2048 1024 512 256 128 64 32 16 8 4 2 1 Lab Submission To receive credit for completing this lab complete the following: 1 - Scan the 2 completed pages …. OR … Take Pictures of the 2 completed pages … OR …. Save the file you typed on.
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