Q: 13
Why does the ISDB block layers 3 and 4 of the OSI model when applying content filtering? (Choose
two.)
Options
Discussion
Its A and B. D might seem tempting but that's more about URL filtering at layer 7, not how ISDB actually works for L3/L4. C's mention of proxy mode is a distractor here imo.
Option C and D for me. ISDB sounds like it's tied to proxy mode and limiting things by URL/domain, which fits content filtering. Not convinced A is right here, feels like a textbook trap.
A/B for sure. ISDB blocks services based on IPs and ports from FortiGuard's database, which is L3 and L4. Not about proxy or URLs here. I've seen a similar question in some practice sets.
Option A and B here. ISDB is all about matching against IPs and ports from FortiGuard's list, which lines up with layers 3 and 4. It's not doing URL/domain filtering like D, that's more for web filtering modules. Pretty sure this is right but open to other interpretations.
C and D tbh
For me, C and D, had something like this in a mock. Didn't see any mention of FortiGuard's IP/port lists.
A/B imo. ISDB is all about using FortiGuard's updated IP/port lists to block specific services at L3 and L4, not URLs or proxies. The question says "layers 3 and 4," so that's why D or C don't really fit here. Pretty sure it's A and B but open to pushback if someone sees it differently.
Its A and B
C and D, not A. Had something like this in a mock and it pointed to proxy mode plus limiting by domain for content filtering.
C/D? Proxy mode and URL/domain limit feel like what content filtering does, A looks like a trap.
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