Networking
Exam drill
Which /26 subnet holds this host?
This one costs students marks every year: which subnet is 192.168.10.150 in?
Quick check · tap an answer to continue
Lesson notes
Describe how frames move within a LAN using MAC addresses, switches and Ethernet
Key points
- A /26 mask is 255.255.255.192, so the block size is 256 minus 192, which is 64.
- The subnets start at .0, .64, .128 and .192.
- Host .150 falls between .128 and .191, so the network is 192.168.10.128.
- Broadcast is 192.168.10.191, with 62 usable hosts from .129 to .190.
Takeaway: Networks start on block-size multiples; AND the host with the mask.
Quick check: UMaT splits 192.168.10.0/24 into four /26 subnets. Which subnet and broadcast contain host 192.168.10.150?
- .128 to .191 broadcast
- .150 to .213 broadcast
- .64 to .127 broadcast
Show 150 = 10010110 ANDed with 11000000 gives 10000000 = 128.
MAC addressframeswitchEthernet
Lessons like this, for your syllabus.
Short narrated study videos written for your course, level and exam. Free to start.
Get lessons for your own syllabus