50 CISSP Practice Questions and Answers 2025 | CISSP Domain 4 Prep

[@pankajgulati1931]

I have been following your videos for a couple of months now and find them really helpful to evolve my thoughts as CISSP. I am posting here to clarify Question #3. THere are two options A and D as answer. When am looking at ISC2 material, I see that IPSEC also performs message integrity, while you chose to pick answer D. If I look at the optoins, both A and D are overlappiong. Can you help clarify. Thank you.

[@mikealpha]

IPSec do provide message integrity but does not provide authorization. Option A is not correct because it includes authorization which is not provided by IPSec.

[@andrehorn5931]

Very good questions and explanations! Thank you

[@mikealpha]

@@andrehorn5931 Thank You for watching and positive feedback :)

[@ravik7734]

Excellent!! Great work.

[@mikealpha]

@@ravik7734 Thank You for watching and positive feedback. :)

[@MohammedRizwan-r6x]

Very helpful❤

[@mikealpha]

@@MohammedRizwan-r6x Thank You for watching and positive feedback :)

[@SgopalJ4940]

Great Sir thanks for this video

[@mikealpha]

Thank You for watching and positive feedback :)

[@bkbk4726]

Q35. Option A. Should it read each layer adds its own header? The current wording indicates as if there is only one header and each layer adds its information to it. My understanding each layer encapsulates the previous layer information, with its own header and the trailer may or may not be added. Please clarify.

[@mikealpha]

You are right.. each layer adds it's own header.. for example transport layer adds TCP or UDP port number in it's header, network layer or layer 3 adds source and destination IP addresses in it's own header and so on.

[@bkbk4726]

I completed reading the latest ISC2 official study guide. But not able to locate where Q13 related items - high availability cluster with redundant core - explained in the book. Same with question 14. MTU is not explained anywhere in the latest ISC2 CISSP study guide. Can you help. Thanks.

[@mikealpha]

These are networking concepts and may not be familiar to someone without practical networking background. A high availability (HA) cluster is a group of servers designed to provide continuous uptime and failover protection in case of hardware or software failures. It ensures that critical applications and services remain operational by sharing the workloads as well as achieving high availability such that if one server fails, the traffic is handled by remaining nodes in the cluster without any unavailability of services. A redundant core router is a central network router with backup components or a duplicate router to maintain connectivity if the primary router fails. It prevents a single point of failure in the network.

[@mikealpha]

Maximum Transmission Unit (MTU) is the largest size (in bytes) of a data packet that can be sent over a network without fragmentation. If a packet exceeds the MTU, it may be fragmented or dropped, depending on network settings. MTU operates at Layer 2 (Data Link Layer) of the OSI model since it defines the maximum frame size for transmission on a specific network medium (e.g., Ethernet, Wi-Fi).

[@bernardgarrett3897]

Q47 I think B is a better answer, because the address is not valid on the Internet. There is no mention of double NATting in the question.

[@mikealpha]

Thank You for watching and the comment. Option B is wrong because 192.168.1.40 is indeed a valid address under RFC 1918. RFC 1918 defines three private IP address ranges that are non-routable on the public Internet but are valid for internal network use. Since the question is not specifically the Internet, we can't invalidate the addresses because they are FRC 1918 because they can be used inside private networks for all purposes. Ben is encountering an issue with double NAT. Since the internal network and the external IP address of the NAT router are both using the 192.168.x.x range (a private IP range defined by RFC 1918), this can create conflicts, as NAT configurations typically require the internal and external IP ranges to be distinct for proper routing and address translation. When the same range is used on both sides of the NAT, routing decisions become problematic, causing issues in forwarding traffic correctly.

[@bernardgarrett3897]

@@mikealpha How do you know Ben is trying to double NAT? Maybe he doesn't understand that 192.168.1.40 on the external interface is a Private IP address.

[@bendtaaen63]

I tend to agree here Option B is just as valid as option C with the information supplied here. Neither WAN or double NATing is mentioned. Plus: In my opinion a NAT-router is the router to the internet(Mostly):

[@bkbk4726]

Q50 is "Use an alternate protocol like PEAP or EAP-TLS and implement WAP3 is supported" a valid option?

[@mikealpha]

Yes, WPA3 is latest and most secure out of all WiFi protocols. It will be a valid option if given in the question.

[@bendtaaen63]

question 35 Option A happens when data goes DOWN the layers - not UP

[@mikealpha]

Yes.. rightly pointed out

[@bernardgarrett3897]

Q46 RADIUS is really known as Remote Authentication Dial-In User Service so the answer was really in the question.

[@mikealpha]

Yes if one happens to know what RADIUS stands for 🙂

[@bernardgarrett3897]

@@mikealpha One would hope at CISSP level, one would know what RADIUS stands for!!!!