this post was submitted on 21 Jan 2024
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OSI Model - Problems by layer? (zerobytes.monster)
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The original was posted on /r/sysadmin by /u/BoringTone2932 on 2024-01-21 01:31:27+00:00.

I often find myself referencing Layer 2, Layer 3, and then Layer 7 of the OSI model in troubleshooting.

However, rarely do I think “this is a layer 4, or layer 5 problem”.

What examples of problems would you give for layers 4 - 6?

Layer 1: Ethernet cord is broke

Layer 2: Switch is bad

Layer 3: Interface port on the wrong VLAN

Layer 4 - 6?

Layer 7: Bug in the software code.

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