CNT 125 Online - Subnetting Problems Lab

CNT 125 Online - Subnetting Problems Lab Created By: D. Brown CNT 125 Online - Subnetting Problems 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. 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. #1 - The Crazy Guys Cable Company needs their network subnetted to help organize the network. They need at least 5 subnets for their network. The Network Number for their network is: 195.40.25.0 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 ) /27 255.255.255.244 3 2^3=8 Subnets 2^5=32 Add/SN 30 SN # Usable host range SN BA 0 .1-.30 31 32 .33-.64 63 64 .65-.94 95 96 .97-.126 127 128 .129-.158 159 160 .161-.190 191 192 193-.222 223 224 .225-.254 255 What subnet does the following destination IP address belong to? 195.40.25.189 (Use the ANDING Method.) 1 and 1 =1 Destination IP 195 40 25 189 Subnet Mask 255 255 255 224 Result 195 40 25 160 #2 - ACME Magnet Company needs their network subnetted to help organize the network. They need at least 12 subnets for their network. The network # for the network is: 201.100.50.0 1

CNT 125 Online - Subnetting Problems Lab Created By: D. Brown 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 ) /19 255.255.224.0 3 2^3=8 Subnets 2^13=8192 8190 SN # Usable host range SN BA 0.0 0.1-31.254 31.255 32.0 32.1-63.254 63.255 64.0 64.1-95.254 95.255 96.0 96.1-127.254 127.255 128.0 128.1-159.254 159.255 160.0 160.1-191.255 191.255 192.0 192.1-223.254 223.255 224.0 224.1-255.254 255.255 What subnet does the following destination IP address belong to? 201.100.50.72 (Use the ANDING Method.) Destination IP 172 16 100 50 Subnet Mask 255 255 224 0 Result 172 16 96 0 #3 - The Crazy Guys Cable Company decided to use NAT and translate the Public IP Address they were allocated to a Private B Address to support the IP Address needs for the network. To help organize the network they have decided that they will need at least 6 subnets for their network. The Network Number for their network is: 172.16.0.0 2

CNT 125 Online - Subnetting Problems Lab Created By: D. Brown SN # Usable host range SN BA What subnet does the following destination IP address belong to? 172.16.129.10 (Use the ANDING Method.) Destination IP Subnet Mask Result Lab Submission To receive credit for completing this lab complete the following: 1 - Scan the 4 completed pages …. OR … Take Pictures of the 4 completed pages … OR …. Save the file you typed on. 2 - Submit this Scan … or … Pictures … or … Saved File of the 4 completed pages to the Dropbox on D2L for the Subnetting Problems Lab. 3 - After the lab is submitted … Mr. Brown will check the submission - He will be checking for completeness. If the 4 pages have been attempted/completed you will receive full points for the lab submission. 4

CNT 125 Online - Subnetting Problems Lab Created By: D. Brown 4 - After the lab has been graded an Answer Sheet will become visible in D2L with answers to all of the questions. This will appear in the folder where this lab was originally located on D2L. 5