MENU
How many IP assignable addresses are contained in 10.0.128.0/23?
Suggested Answer: D
Get Premium HPE3-U01 Questions
as Interactive Web-Based Practice Test or PDF
Real Exam Format
Detailed Explanations
Instant Access
Get Your Practice Test
34 comments · newest first
IN
India
10 months ago
Nope, definitely 510. The subnet mask tells you that.
DU
Dudley
10 months ago
Totally agree, 510 is the right answer!
CH
Chuck
10 months ago
It's 510 assignable addresses in that range.
RI
Rickie
11 months ago
Wait, are you sure? I thought it was more like 512.
PA
Patrick
11 months ago
Wow, I didn't know it was that specific!
GI
Gilma
11 months ago
I thought it was 4094 for a /23, but now I’m questioning that. I need to double-check how the subnetting works.
AL
Alida
11 months ago
I’m a bit confused about the math here. Is it 512 total addresses minus 2 for the network and broadcast? That would leave 510, right?
ST
Stephaine
12 months ago
I practiced a similar question last week, and I think it was about calculating usable addresses. I believe you subtract 2 for the network and broadcast addresses.
AN
An
12 months ago
I think I remember that a /23 subnet has 9 bits for hosts, which might mean 2^9 addresses, but I’m not sure how many are usable.
PA
Paz
12 months ago
The key is understanding how the /23 subnet mask works. It gives you 9 host bits, so the total number of assignable addresses is 2^9 - 2 = 510.
RE
Reena
1 year ago
I'm a bit confused on how to approach this. Let me re-read the question and think it through step-by-step.
SL
Slyvia
1 year ago
Wait, isn't it 2^8 - 2 = 254 addresses? The /23 subnet only uses 23 bits, so the last 8 bits are for the hosts.
MA
Marica
1 year ago
Okay, I've got this. The /23 subnet mask means 23 bits for the network and 9 bits for the host. That's 2^9 - 2 = 510 assignable addresses.
PO
Portia
1 year ago
Hmm, this looks like a tricky IP addressing question. I'll need to think through the subnet mask and network range carefully.
CH
Christiane
1 year ago
As a network admin, I can tell you that 10.0.128.0/23 is the way to go. D is the correct choice, hands down.
KA
Karma
1 year ago
Wait, is this a trick question? What if the answer is actually 42? *laughs* Nah, I'm sticking with D.
DO
Donte
1 year ago
I'm going with B) 254.
FR
Frank
1 year ago
I think the answer is A) 4094.
AL
Alise
1 year ago
I'm torn between B and C, but I'll go with C. Gotta love those subnets!
BU
Bulah
1 year ago
User 2: I'm torn between B and C, but I'll go with C. Gotta love those subnets!
VA
Valentin
1 year ago
User 1: I think the answer is B) 254.
FA
Fallon
1 year ago
I agree with Hillary, the correct answer is C) 510.
GE
German
1 year ago
Definitely D. 512 IP addresses, easy peasy!
MA
Matilda
1 year ago
No, it's actually D) 512
MA
Marsha
1 year ago
Actually, it is D) 512 IP addresses. You were right!
AN
Andrew
1 year ago
No way, it's definitely D) 512 IP addresses.
AN
Anika
1 year ago
I think it's A) 4094
NO
Norah
1 year ago
I think it's actually A) 4094 IP addresses.
HI
Hillary
1 year ago
But the subnet mask /23 gives us 2^9 - 2 = 510 usable addresses.
ET
Ettie
1 year ago
I believe it's C) 510.
HI
Hillary
1 year ago
I think the answer is A) 4094.
SH
Shalon
1 year ago
Hmm, let's see... 10.0.128.0/23 covers a range of 510 IP addresses? I think I'm going with C on this one.
MA
Malcom
1 year ago
Yes, I agree. C) 510 seems to be the correct answer.
FE
Fernanda
1 year ago
I think you're right, it should be 510 IP addresses.