ISC2 SSCP Exam - Topic 3 Question 17 Discussion

Actual exam question for ISC2's SSCP exam

Question #: 17
Topic #: 3

[All SSCP Questions]

Before the advent of classless addressing, the address 128.192.168.16 would have been considered part of:

Aa class A network.

Ba class B network.

Ca class C network.

Da class D network.

Show Suggested Answer

Suggested Answer: B

Before the advent of classless addressing, one could tell the size of a network by the first few bits of an IP address. If the first bit was set to zero (the first byte being from 0 to 127), the address was a class A network. Values from 128 to 191 were used for class B networks whereas values between 192 and 223 were used for class C networks. Class D, with values from 224 to 239 (the first three bits set to one and the fourth to zero), was reserved for IP multicast.

Source: STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000, Chapter 3: TCP/IP from a Security Viewpoint.

by Erinn at May 06, 2022, 02:42 AM

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Anabel

4 months ago

Surprised it's not class C, thought it was more common!

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Delfina

4 months ago

Nope, class A is way off.

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Renato

4 months ago

Wait, isn't it class C? I'm not so sure.

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Ryan

4 months ago

I agree, class B all the way!

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Martin

5 months ago

Definitely a class B network.

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Tijuana

5 months ago

I thought class C was for addresses starting with 192, but since this one starts with 128, I guess it must be class B.

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Evette

5 months ago

I'm not entirely sure, but I remember something about class A being for addresses starting with 1 to 126. So, maybe class B is correct?

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Pearly

5 months ago

I think the address 128.192.168.16 falls under class B because it starts with 128, which is in the range for class B networks.

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Derrick

5 months ago

I practiced a similar question, and I believe class B is right too. The first octet being 128 definitely points to that.

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Nickolas

5 months ago

This one seems pretty straightforward. I'm going to go with option C - data in email message. That's the type of data that would require both the sender and receiver to have encryption/decryption capabilities.

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Kayleigh

5 months ago

From what I studied, I feel like cloud setups often focus on logical separation, so I'm leaning towards "logical, one or more." That feels right based on similar practice questions.

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Britt

5 months ago

Hmm, I'm a bit unsure about this one. The command in the solution looks a little strange to me. I'll need to review my Docker swarm cluster management notes to make sure I'm understanding this correctly.

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Lavonna

5 months ago

Hmm, I'm a bit unsure about this. I'll have to re-read the question and options carefully to make sure I understand it fully before answering.

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