GIAC GISP Exam - Topic 3 Question 88 Discussion

Actual exam question for GIAC's GISP exam

Question #: 88
Topic #: 3

[All GISP Questions]

Which of the following protocols work at the network layer?

Each correct answer represents a complete solution. Choose three.

AOSPF

BSPX

CIGMP

DRIP

Show Suggested Answer

Suggested Answer: A, C, D

by Janine at Jun 16, 2026, 09:52 PM

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Franchesca

3 days ago

SPX is not network layer, it's transport. So A, B, and D for sure!

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Kimberely

8 days ago

Yeah, I agree! RIP and OSPF are routing protocols. IGMP is for multicast.

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Belen

13 days ago

I think A, B, and D are correct. They all operate at the network layer.

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Felicitas

19 days ago

SPX is actually a transport layer protocol, not network.

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Casie

24 days ago

Wait, IGMP? I didn't expect that one!

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Ines

29 days ago

Totally agree, RIP and OSPF are definitely correct!

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Zack

1 month ago

I thought SPX was a network layer protocol too?

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Niesha

1 month ago

RIP, OSPF, and IGMP are all network layer protocols.

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Mel

1 month ago

I’m pretty confident that both RIP and OSPF are correct, but I’m torn between IGMP and SPX for the third option.

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Carylon

2 months ago

I feel like IGMP is related to multicast, so it might be a network layer protocol too, but I can't recall for sure.

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Ressie

2 months ago

I remember practicing a question where we had to identify protocols by layer, and I think SPX is more of a transport layer protocol.

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Breana

2 months ago

I think RIP and OSPF are definitely network layer protocols, but I'm not sure about IGMP.

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