Eccouncil ICS-SCADA Exam - Topic 1 Question 38 Discussion

Actual exam question for Eccouncil's ICS-SCADA exam

Question #: 38
Topic #: 1

A Virtual Private Network (VPN) requires how many Security Associations?

Show Suggested Answer

Suggested Answer: D

A Virtual Private Network (VPN) typically requires two Security Associations (SAs) for a secure communication session. One SA is used for inbound traffic, and the other for outbound traffic.

In the context of IPsec, which is often used to secure VPN connections, these two SAs facilitate the bidirectional secure exchange of packets in a VPN tunnel.

Each SA uniquely defines how traffic should be securely processed, including the encryption and authentication mechanisms. This ensures that data sent in one direction is handled independently from data sent in the opposite direction, maintaining the integrity and confidentiality of both communication streams.

Reference

'Understanding IPSec VPNs,' by Cisco Systems.

'IPsec Security Associations,' RFC 4301, Security Architecture for the Internet Protocol.

by Andree at Jan 05, 2026, 05:16 AM

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Otis

3 days ago

D) 2 makes sense. Any more than that and it would be a Virtual Private Circus, am I right?

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Craig

8 days ago

I thought a VPN needed at least 3 security associations - one for each direction and one for the handshake. Guess I need to brush up on my VPN knowledge.

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Izetta

13 days ago

D) 2 is the correct answer. A VPN typically requires two Security Associations, one for each direction of communication.

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Shawna

18 days ago

I’m pretty confident it’s 2, since each end of the VPN connection needs to establish a secure channel.

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Coral

24 days ago

I feel like it might be 4, but I can't recall the details. I need to double-check my notes on Security Associations.

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Corrie

29 days ago

I remember practicing a question like this, and I think the answer was 2, but I could be mixing it up with something else.

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Edelmira

1 month ago

I think a VPN typically needs at least two Security Associations, one for each direction of traffic, but I'm not completely sure.

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Danica

1 month ago

Ah, I remember this now. A VPN needs to establish security associations for both the inbound and outbound traffic, as well as for the key exchange process. I think the correct answer is C.

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Verona

1 month ago

Wait, I thought a VPN needed more than just two security associations. I'm going to have to review my notes to make sure I'm not missing something here.

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Lucina

2 months ago

I'm pretty confident I know the answer to this one. A VPN typically requires two security associations, one for each direction of communication. I'll go with option D.

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Ellsworth

2 months ago

Okay, let me see. I know a VPN needs some kind of security setup, but I can't recall the exact number. I'll have to eliminate the options that don't seem right.

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Annette

2 months ago

Hmm, I think I remember learning about VPN security associations in class, but I'm a bit fuzzy on the details. I'll have to think this through carefully.

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