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How many usable IP addresses are there in a 23-bit (255.255.254.0) subnet?
Suggested Answer: B
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22 comments · newest first
LU
Lucy
3 days ago
Yeah, I agree!
KA
Kattie
8 days ago
I think it's B) 510.
TI
Timothy
13 days ago
I was confused at first, but now it’s clear.
BL
Blair
18 days ago
Makes sense!
GE
Geoffrey
24 days ago
Because you subtract 2 for network and broadcast addresses.
EA
Earleen
29 days ago
But why 510?
BE
Bettyann
1 month ago
Yeah, I agree!
GE
Geoffrey
1 month ago
I think it's B) 510.
CH
Christiane
1 month ago
I thought it was 512, but I guess I was wrong!
DO
Dorethea
2 months ago
510 is correct, just subtract 2 for network and broadcast addresses.
AL
Albert
2 months ago
Wait, how do you get 510? I thought it was less.
BE
Belen
2 months ago
Totally agree, it's 510!
MA
Margot
2 months ago
There are 510 usable IPs in a /23 subnet.
JO
Johnson
2 months ago
I thought it was 512, but I guess I was wrong!
DE
Desirae
3 months ago
510 is correct, just subtract 2 for network and broadcast addresses.
DO
Dominga
3 months ago
Wait, how do you get 510? I thought it was less.
YU
Yuriko
3 months ago
Totally agree, it's 510!
KA
Kati
3 months ago
There are 510 usable IPs in a /23 subnet.
AN
Annamae
3 months ago
I believe it's 510 usable IPs, but I could be wrong. I remember the formula but not the exact numbers!
LU
Lucille
3 months ago
Wait, is it 512 total addresses for a /23? I feel like I might be mixing up the calculations.
AS
Asuncion
4 months ago
I practiced a similar question last week, and I think the answer was 510 because you take the total addresses and subtract 2.
JA
Jamie
5 months ago
I think I remember that in a subnet, you subtract 2 for the network and broadcast addresses, but I'm not sure how that applies to a 23-bit mask.