ISC2 SSCP Exam - Topic 6 Question 86 Discussion

Actual exam question for ISC2's SSCP exam

Question #: 86
Topic #: 6

[All SSCP Questions]

The Logical Link Control sub-layer is a part of which of the following?

AThe ISO/OSI Data Link layer

BThe Reference monitor

CThe Transport layer of the TCP/IP stack model

DChange management control

Show Suggested Answer

Suggested Answer: B

Instead of using a Certificate Authority, PGP uses a 'Web of Trust', where users can certify each other in a mesh model, which is best applied to smaller groups.

In cryptography, a web of trust is a concept used in PGP, GnuPG, and other OpenPGP compatible systems to establish the authenticity of the binding between a public key and its owner. Its decentralized trust model is an alternative to the centralized trust model of a public key infrastructure (PKI), which relies exclusively on a certificate authority (or a hierarchy of such). The web of trust concept was first put forth by PGP creator Phil Zimmermann in 1992 in the manual for PGP version 2.0.

Pretty Good Privacy (PGP) is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting and decrypting texts, E-mails, files, directories and whole disk partitions to increase the security of e-mail communications. It was created by Phil Zimmermann in 1991.

As per Shon Harris's book:

Pretty Good Privacy (PGP) was designed by Phil Zimmerman as a freeware e-mail security program and was released in 1991. It was the first widespread public key encryption program. PGP is a complete cryptosystem that uses cryptographic protection to protect e-mail and files. It can use RSA public key encryption for key management and use IDEA symmetric cipher for bulk encryption of data, although the user has the option of picking different types of algorithms for these functions. PGP can provide confidentiality by using the IDEA encryption algorithm, integrity by using the MD5 hashing algorithm, authentication by using the public key certificates, and nonrepudiation by using cryptographically signed messages. PGP initially used its own type of digital certificates rather than what is used in PKI, but they both have similar purposes. Today PGP support X.509 V3 digital certificates.

Reference(s) used for this question:

KRUTZ,

Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 4: Cryptography (page 169).

Shon Harris, CISSP All in One book

https://en.wikipedia.org/wiki/Pretty_Good_Privacy

TIPTON, Hal, (ISC)2, Introduction to the CISSP Exam presentation.

by Adelina at Apr 20, 2024, 05:26 PM

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Lizbeth

3 months ago

Surprised to see options like the Reference monitor here!

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Dean

3 months ago

No way, it's definitely not about change management control.

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Ruth

3 months ago

Wait, isn't it also related to the TCP/IP model?

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Bernardine

4 months ago

Totally agree, that's a basic networking fact!

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Jonelle

4 months ago

It's part of the ISO/OSI Data Link layer.

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Portia

4 months ago

I definitely recall that the Logical Link Control is linked to the Data Link layer, but I hope I’m not mixing it up with something else!

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Alexis

4 months ago

I'm a bit confused; I thought the Logical Link Control was related to the Transport layer somehow. Could it be option C?

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Sean

4 months ago

I remember practicing a similar question about the OSI layers, and I think I got it right then. It has to be option A.

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Ellsworth

5 months ago

I think the Logical Link Control sub-layer is part of the Data Link layer in the OSI model, but I'm not entirely sure.

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Brett

5 months ago

Alright, I'm pretty confident the Logical Link Control sub-layer is part of the Data Link layer in the OSI model. That's the option I'm going to select for this question.

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Jolanda

5 months ago

Wait, is the Logical Link Control sub-layer part of the TCP/IP stack model instead? I'm a bit confused between the OSI and TCP/IP models. I'll have to think this through carefully.

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Raina

5 months ago

I think the Logical Link Control sub-layer is part of the Data Link layer in the OSI model. That sounds familiar from my networking classes. Let me double-check the options to be sure.

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Gilbert

5 months ago

Okay, the options mention the Data Link layer, the Reference monitor, the Transport layer, and Change management control. I'm not sure about the Reference monitor or Change management control, so I'll focus on the networking layers.

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Raymon

5 months ago

Hmm, this looks like a networking question. I remember learning about the OSI model, so I'll try to recall which layer the Logical Link Control sub-layer is part of.

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Yuette

5 months ago

I think the key here is understanding the different layers of the OSI model and where the Logical Link Control sub-layer fits in. If I can recall the responsibilities of each layer, that should help me identify the correct answer.

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Stevie

5 months ago

I'm a bit unsure about this one. The Logical Link Control sub-layer doesn't sound familiar to me, and I'm not sure how it relates to the other options. I'll have to think this through carefully.

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Xuan

5 months ago

Ah, the Logical Link Control sub-layer - that's definitely part of the Data Link layer in the OSI model. I'm pretty confident that's the right answer here.

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Lon

5 months ago

Okay, the options mention the Data Link layer and the Transport layer, so I'm guessing this has something to do with the OSI model. I'll try to recall what I know about the different layers and see if I can narrow it down.

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France

5 months ago

Hmm, this seems like a networking question. I remember learning about the OSI model, so I'll start by thinking through the different layers and see if the Logical Link Control sub-layer rings a bell.

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Paola

5 months ago

Hmm, I'm not sure about the exact syntax for the imperative command. Let me think this through carefully.

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Serita

5 months ago

This seems straightforward. The connection has to be closed manually using a Disconnect activity. I'll make sure to include that in my answer.

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Kindra

5 months ago

I think the matching digests demonstrate integrity, but I'm not entirely sure if there's a better answer.

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Latrice

10 months ago

I wonder if the correct answer is 'All of the above' - that's usually a safe bet, right? Just kidding, I know the Logical Link Control is part of the Data Link layer. Time to grab a coffee and keep studying!

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Sheldon

8 months ago

C) The Transport layer of the TCP/IP stack model

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Elke

8 months ago

B) The Reference monitor

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Essie

9 months ago

A) The ISO/OSI Data Link layer

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Iluminada

10 months ago

Change management control? That's not even a networking term. Whoever came up with that option is just trying to trick us!

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Ilda

10 months ago

The Transport layer? No way, the Logical Link Control is all about managing data link-level communications, not transport-level stuff. I hope I don't mix those up on the test!

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Dolores

9 months ago

So, it's not related to the Transport layer at all. Good to know for the test!

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Meghann

9 months ago

Yeah, it's responsible for managing communication between devices on the same network.

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Barabara

9 months ago

I think you're right, the Logical Link Control is definitely part of the ISO/OSI Data Link layer.

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Kassandra

10 months ago

Wait, the Reference monitor? That's a completely different concept. I think I need to review my networking layers again before the exam.

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Hershel

9 months ago

C) The Transport layer of the TCP/IP stack model

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Mila

9 months ago

B) The Reference monitor

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Tiffiny

10 months ago

A) The ISO/OSI Data Link layer

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Ma

10 months ago

I believe it's not part of the Transport layer of the TCP/IP stack model. That's where the TCP and UDP protocols reside.

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Dusti

10 months ago

I agree with Peggy. The LLC sub-layer is responsible for error detection and flow control at the Data Link layer.

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Doug

10 months ago

The Logical Link Control sub-layer is definitely part of the ISO/OSI Data Link layer. This is a fundamental networking concept that I've studied extensively.

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Alexia

9 months ago

It's important to understand the different layers in networking to grasp concepts like this.

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Raina

10 months ago

I agree, the Logical Link Control sub-layer is indeed part of the ISO/OSI Data Link layer.

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Peggy

11 months ago

I think the Logical Link Control sub-layer is part of the ISO/OSI Data Link layer.

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