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CertNexus ITS-110 Exam - Topic 7 Question 70 Discussion

Actual exam question for CertNexus's ITS-110 exam

Question #: 70
Topic #: 7

[All ITS-110 Questions]

What is one popular network protocol that is usually enabled by default on home routers that creates a large attack surface?

AOpen virtual private network (VPN)

BUniversal Plug and Play (UPnP)

CNetwork Address Translation (NAT)

DDomain Name System Security Extensions (DNSSEC)

Show Suggested Answer

Suggested Answer: B

by Lisha at May 02, 2026, 07:27 PM

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Jani

3 days ago

I didn't know UPnP was a problem until now.

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Sylvie

8 days ago

UPnP should be disabled for security.

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Nakita

13 days ago

Definitely B) UPnP. It opens many ports automatically.

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Bettina

18 days ago

UPnP is convenient but dangerous.

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Quinn

23 days ago

UPnP allows easy access for attackers.

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Chauncey

28 days ago

I feel like NAT is safer. But UPnP is risky.

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Marge

1 month ago

Yeah, I agree! UPnP can expose devices.

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Melissa

1 month ago

I think it's B) UPnP. It's often enabled by default.

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Clay

1 month ago

Disagree, NAT is pretty secure if configured right.

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Nu

2 months ago

Yup, UPnP is a huge attack surface.

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Lore

2 months ago

Wait, UPnP is a big risk? I had no idea!

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Meghan

2 months ago

I thought NAT was the one that creates security issues?

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Alverta

2 months ago

Definitely UPnP, it's often left on by default.

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Shalon

2 months ago

I remember discussing UPnP in class, but I also feel like DNSSEC could be relevant. However, I think UPnP is the most likely answer here.

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Verona

4 months ago

I’m a bit confused; I thought NAT also had some security features. Is it really considered an attack surface like UPnP?

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Junita

4 months ago

I recall practicing a question like this, and UPnP was definitely highlighted as a common vulnerability. It seems to be the right choice.

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Dustin

4 months ago

I think the answer might be UPnP, but I'm not entirely sure. I remember it being mentioned in a lecture about home network security.

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