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PostgreSQL PGCES-02 Exam - Topic 3 Question 82 Discussion

Posted by Daniel on Mar 09, 2025 at 11:56 PM

Configuration file pg_hda.conf is set as below on a host currently running PostgreSQL. local all all trust host all all 192.168.1.0/24 reject host all all 192.168.0.0/16 trust Select a host IP address which is authorized to connect to this database via the network. Note:

INET domain socket communication is available.

Suggested Answer: B

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37 comments · newest first
OL
Olen 10 months ago
Wait, can 127.0.0.1 connect too?
JO
Joanna 10 months ago
I think 192.168.0.1 is actually rejected.
DY
Dyan 10 months ago
192.168.1.1 is good to go!
GL
Glendora 10 months ago
Definitely not 192.168.0.1, that's a no.
AF
Afton 10 months ago
Seems like none can connect, right?
CH
Christoper 11 months ago
I feel like none can connect since the reject rule is pretty strict, but I might be overthinking it.
FL
Fletcher 11 months ago
I'm confused about 192.168.0.1 because it seems like it should be rejected based on the config.
ME
Melina 11 months ago
I remember something about the "trust" method allowing connections, so maybe 192.168.1.1 is the right choice.
ME
Melvin 11 months ago
I think 192.168.1.1 should be allowed since it's in the 192.168.1.0/24 range, but I'm not completely sure.
SH
Shenika 12 months ago
This is a tricky one. I'm going to sketch out the IP address ranges on paper to visualize the network configuration and make sure I select the right answer.
CA
Carla 12 months ago
Wait, what about the local all all trust line? Doesn't that mean the localhost address 127.0.0.1 should also be allowed? I'm not sure, but I'll double-check my understanding before answering.
WA
Wayne 12 months ago
Okay, I think I've got this. The 192.168.1.0/24 range is allowed, but the 192.168.0.0/16 range is rejected. So the authorized IP address must be within the 192.168.1.0/24 range, which means 192.168.1.1 is the correct answer.
AY
Ayesha 1 year ago
Hmm, I'm a bit confused by the subnet mask notation. I'll need to review my networking concepts to make sure I understand how to interpret the 192.168.0.0/16 and 192.168.1.0/24 ranges.
DE
Della 1 year ago
This looks like a straightforward networking question. I'll carefully read through the configuration file details and think through the IP address ranges to determine which one is authorized.
CI
Ciara 1 year ago
Ah, the joys of network security! I'm gonna go with B, 192.168.1.1. It's the only one that's explicitly allowed, and I'm not feeling lucky enough to try any of the others. Although, I do have a strong urge to change that config file...just for fun, of course!
IV
Ivette 1 year ago
↳ replying to Ciara
User 4: Yeah, changing the config file just for fun might not end well!
LA
Lauran 1 year ago
↳ replying to Ciara
User 3: I agree, it's always best to stick to what's explicitly allowed.
MI
Misty 1 year ago
↳ replying to Ciara
User 2: Good choice, better safe than sorry!
EL
Elenor 1 year ago
↳ replying to Ciara
User 1: B) 192.168.1.1
JE
Jesusa 1 year ago
Hmm, I'm feeling a bit like a hacker trying to break into Fort Knox here. But I think the answer is B, 192.168.1.1. I mean, who doesn't love a good ol' network security challenge, right? *winks*
DE
Denae 1 year ago
↳ replying to Jesusa
User 3: Agreed, let's go with 192.168.1.1.
BE
Bernadine 1 year ago
↳ replying to Jesusa
User 2: Yeah, that seems like the right choice.
GL
Glenna 1 year ago
↳ replying to Jesusa
User 1: I think the answer is B, 192.168.1.1.
ME
Melvin 1 year ago
Easy peasy, it's B! 192.168.1.1 is the only one that's explicitly allowed. Although, I'd love to know who set up this config file - it's like a game of IP Address Twister!
TA
Tamar 1 year ago
↳ replying to Melvin
I wonder why they chose such specific IP addresses to allow or reject.
EL
Eleni 1 year ago
↳ replying to Melvin
True, it's a bit of a puzzle with all those different settings.
RU
Ruth 1 year ago
↳ replying to Melvin
Easy peasy, it's B! 192.168.1.1 is the only one that's explicitly allowed.
RO
Rosenda 1 year ago
↳ replying to Melvin
E) None can be connected.
VE
Veronika 1 year ago
↳ replying to Melvin
D) 192.168.1.0
SA
Salome 1 year ago
↳ replying to Melvin
C) 192.168.0.1
EU
Eun 1 year ago
↳ replying to Melvin
B) 192.168.1.1
JU
Jules 1 year ago
↳ replying to Melvin
A) 127.0.0.1
EA
Earleen 1 year ago
Oooh, tricky one! Let's see, the 192.168.0.0/16 network is rejected, but 192.168.1.0/24 is allowed. So I'm gonna go with D, 192.168.1.0. Gotta love those subnet masks!
DY
Dylan 1 year ago
Hmm, looks like the configuration is a bit of a mess. I'm going to go with B, 192.168.1.1. It's the only one that's explicitly allowed in the 192.168.1.0/24 network.
FA
Fausto 2 years ago
Hmm, that's a good point. I see where you're coming from. Let's double check the configuration file to be sure.
CO
Coral 2 years ago
I disagree, I believe the correct answer is D) 192.168.1.0 because it matches the subnet specified in the configuration file.
FA
Fausto 2 years ago
I think the correct answer is B) 192.168.1.1 because it falls within the range specified in the configuration file.
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