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    • steveS

      Switch Interface Properties - CompTIA Network+ N10-007 Prof Messer

      Training
      • comptia network+ prof messer networking switching certification it training video training youtube switch • • steve
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      scottalanmillerS

      @mary said in Switch Interface Properties - CompTIA Network+ N10-007 Prof Messer:

      Are port mirrors common for companies that monitor what employees are doing on the network or is something else used?

      No, that would be insanely impractical. A port mirror doesn't give you a copy of what someone is actually doing, it gives you a copy of the network traffic. Which is a butt load of disconnected data. It's not like you would know what the end user was doing, only what was being transferred on the wire.

      If you think about what you'd see on the wire... a single file transfer or LAN based action might generate a huge amount of traffic. Or going to a website might create a bunch of unintentional traffic from ads that aren't something that the end user cared about. Or a website or app open in the background might generate gops of traffic for something that isn't being used.

      It would be able to tell you if the person is on YouTube or Spotify, but would not tell you what they are doing that for or if they are actively "using" that thing. Basically you'd be flooded with information that would take ages to sort through, and the resulting information would tell you essentially nothing about what the end user was doing.

    • steveS

      Spanning Tree Protocol - CompTIA Network+ N10-007 Prof Messer

      Training
      • comptia network+ prof messer it training video training youtube it career networking stp spanning tree protocol switching • • steve
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      travisdh1T

      @melvinsilva said in Spanning Tree Protocol - CompTIA Network+ N10-007 Prof Messer:

      I had experience when "users" manipulate patch panel or switch and plug both end of the cable (patch cord) to the same switch, creating a physical loop, but STP blocks this and prevent network issues.

      Yeah, having switches that have STP turned on by default can be such a life saver in those situations. One place I worked liked to put in unmanaged switches all over the place. Caused me multiple long nights just tracking down which switch was the issue and then finding the loop cable. I knew exactly what was going on, finding it without good documentation and people saying "Oh, there's another network thingy over here." was just so much.... fun.

    • scottalanmillerS

      Diving into the ISO OSI Network Stack Discussion

      IT Discussion
      • fibre channel networking switching iso osi network stack • • scottalanmiller
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      scottalanmillerS

      @coliver said in Diving into the ISO OSI Network Stack Discussion:

      I always assumed iSCSI was at the application layer because it's in the name. iSCSI is literally SCSI commands encapsulated in TCP/IP packets.

      Good way to think of it.

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