A company is using an address range of 172.18.0.0/23. Which of the following are valid host addresses if the zero subnet is usable (choose three)
172.18.0.0
172.18.0.174
172.18.1.0
172.18.1.236
172.18.1.255
172.18.2.182
According to cisco, the answers are 172.18.0.174, 172.18.1.0, and 172.18.1.236, I don't know why 172.18.2.182 isn't part of an answer??
2007-06-12 06:57:53 · 3 answers · asked by White Shooting Star of HK 7 in Computers & Internet ➔ Computer Networking
because 172.18.2.x (and 172.18.3.x) are in different networks than 172.18.1.x (and 172.18.0.x) if the netmask is 23 bits wide.
2007-06-12 07:05:53 · answer #1 · answered by CinderBlock 5 · 2⤊ 0⤋
Better go back and learn how to subnet. the answer is in 172.18.0.0/23. The fist addy ending in zero is the network(not useable) and the last addy ending in 255 is broadcast(not useable).
Note that .1.0 is useable as it is in the same network so only 0.0 is the network addy. Same holds for 0.255 is not a broadcast(not a choice here).
.2 is on another network once you define your network according to the bits borrowed as illustrated in the /23 suffix to the master ip address scheme.
Do your home work, no free answer here. You need to learn how to use the /23 suffix not have us tell you!
AAS Comp Networking, ISP Help Desk Tech
2007-06-12 16:22:48 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I think it;s cuz you can't subnet to 2 if your range is ###.###.0.### If your range started at ###.###.1.### then maybe it would be a possibility
idunno, it's been a while since my TCP\IP class.
2007-06-12 14:08:18 · answer #3 · answered by MommyToo 4 · 0⤊ 1⤋