NET603 S1-2021 Blog

A company has a 190.240.0.0/16 block. They now want to re-organise it into large blocks. They wish to have subnets that can handle at least 1000 hosts each.   Also, please calculate the following for the second subnet: ·          Subnet mask ·          Subnet address ·          First usable address in that subnet ·          Last usable address in that subnet ·          Broadcast address of that subnet     190.240.0.0 / 16 190 : 240 : SSSSSSHH : HHHHHHHH 2 S = 64 Subnets   ::   256 / 64 = 4 4 Subnet Range E.g., 0, 4, 8, 12, 16 etc 2 H = 1024   ::   Usable 1024 – 2 Number of usable hosts per subnet CIDR: 22 E.g., (8(190) + 8(240) + ...

This week we revisited subnetting and explored several more examples.  Being able to demonstrate an understanding of subnetting shows you can articulate binary and translate it into a decimal representation.  Subnetting and CIDR, masks, host/subnet totals, net and broadcast addresses will be assessed. Subnetting Examples Steal 1 Host Bit from 192.168.1.0 NNNNNNNN : NNNNNNNN : NNNNNNNN : SHHHHHHH CIDR: 25 Subnet Mask: 255.255.255.128 Number of Subnets: 2 Usable Hosts Per Subnet: 126 Net Addresses: 192.168.1.0 192.168.1.128 Broadcast Addresses: 192.168.1.127 192.168.1.255   Steal 5 Host Bit from 192.168.0.0 NNNNNNNN : NNNNNNNN : SSSSSHHH : HHHHHHHH CIDR: 21 Subnet Mask: 255.255.248.0 Number of Subnets: ...

I’m Daniel, and this is my second year studying at NMIT.  My previous experience in infrastructure includes NET502 in my first year and a previous IT job I had when I was younger for a technology company that specialised in ophthalmology and digital imaging.  While I have had some networking experience, I have found revisiting the topic to be an intriguing and rewarding learning curve to develop new skills and be immersed in new technology types.  Suffice it to say, infrastructure has come a long way since working with it last. As to my ambition, I am not sure where I would like to go with these skills career-wise.  Currently, I find both infrastructure and software development stimulating subject matters.  My results and skills attained this year in my chosen subjects will help me develop a more robust career path.