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CIRCLE WITH A DOT

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  3. What is USB?

What is USB?

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  • 0x0ddc0ffee@infosec.exchange0 0x0ddc0ffee@infosec.exchange

    @paul_ipv6 @brouhaha SMTP, SNMP . . . honorable mention for LDAP . . . yeah, checks-out.

    paul_ipv6@infosec.exchangeP This user is from outside of this forum
    paul_ipv6@infosec.exchangeP This user is from outside of this forum
    paul_ipv6@infosec.exchange
    wrote last edited by
    #9

    @0x0ddc0ffee @brouhaha

    it's important to be able to recognize the warning signs in technology.

    from my days in modems: "Async. Analog. Serial. Three adjectives used to describe things that suck."

    more recent warning signs: "Web 3.0", "Software Defined xxx", "Block Chain", and "Cloud"

    1 Reply Last reply
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    • 0x0ddc0ffee@infosec.exchange0 0x0ddc0ffee@infosec.exchange

      @paul_ipv6 @brouhaha SMTP, SNMP . . . honorable mention for LDAP . . . yeah, checks-out.

      vathpela@infosec.exchangeV This user is from outside of this forum
      vathpela@infosec.exchangeV This user is from outside of this forum
      vathpela@infosec.exchange
      wrote last edited by
      #10

      @0x0ddc0ffee @paul_ipv6 @brouhaha the real miracle is it's from Intel and doesn't have "advanced" in the name.

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      • paul_ipv6@infosec.exchangeP paul_ipv6@infosec.exchange

        @brouhaha

        as soon as someone feels the need to include words like "universal", "simple", etc. into the name of the protocol, you can assume it's all lies.

        just_one_bear@mastodon.socialJ This user is from outside of this forum
        just_one_bear@mastodon.socialJ This user is from outside of this forum
        just_one_bear@mastodon.social
        wrote last edited by
        #11

        @paul_ipv6 @brouhaha Justas how consumer products with "Super" or "Hi-Fi" or "Pro" in the name _aren't_. 🙂

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        • 0x0ddc0ffee@infosec.exchange0 0x0ddc0ffee@infosec.exchange

          @paul_ipv6 @brouhaha TFTP just about lives-up to its name, I guess, but that's the only one that comes to mind.

          rwwh@mastodon.socialR This user is from outside of this forum
          rwwh@mastodon.socialR This user is from outside of this forum
          rwwh@mastodon.social
          wrote last edited by
          #12

          @0x0ddc0ffee @paul_ipv6 @brouhaha luckily X.509 and Bluetooth almost completely define their technology in their name…. They must be counter-examples?

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          • brouhaha@mastodon.socialB brouhaha@mastodon.social

            What is USB? Oh, that's easy! It's named for what it isn't.

            USB is not Universal.
            USB is not (entirely) Serial.
            USB is not a Bus.

            bonkers@nerdculture.deB This user is from outside of this forum
            bonkers@nerdculture.deB This user is from outside of this forum
            bonkers@nerdculture.de
            wrote last edited by
            #13

            @brouhaha yeah, my kid just took one to school. Didn't look like anything even close.

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            • paul_ipv6@infosec.exchangeP paul_ipv6@infosec.exchange

              @brouhaha

              as soon as someone feels the need to include words like "universal", "simple", etc. into the name of the protocol, you can assume it's all lies.

              etchedpixels@mastodon.socialE This user is from outside of this forum
              etchedpixels@mastodon.socialE This user is from outside of this forum
              etchedpixels@mastodon.social
              wrote last edited by
              #14

              @paul_ipv6 @brouhaha I wonder if it's because you put simple or lightweight in front of things when you indicate it's merely less bad than the previous attempt, whereas if it's already simple you don't need to mention it ?

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              • 0x0ddc0ffee@infosec.exchange0 0x0ddc0ffee@infosec.exchange

                @paul_ipv6 @brouhaha TFTP just about lives-up to its name, I guess, but that's the only one that comes to mind.

                etchedpixels@mastodon.socialE This user is from outside of this forum
                etchedpixels@mastodon.socialE This user is from outside of this forum
                etchedpixels@mastodon.social
                wrote last edited by
                #15

                @0x0ddc0ffee @paul_ipv6 @brouhaha SNTP ?

                0x0ddc0ffee@infosec.exchange0 1 Reply Last reply
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                • gilesgoat@toot.walesG gilesgoat@toot.wales

                  @brouhaha .. I have to ask .. "why it's not entierly serial' and 'why it's not a bus' ? What defines a 'bus' ?

                  bwh@tech.lgbtB This user is from outside of this forum
                  bwh@tech.lgbtB This user is from outside of this forum
                  bwh@tech.lgbt
                  wrote last edited by
                  #16

                  @gilesgoat @brouhaha A bus is usually considered as being able to connect a variable number of devices without active bridges between them. USB originally worked that way, but USB 3.x SuperSpeed signals are strictly point-to-point.

                  As for serial, I think the objection is that there can be multiple data signals in each direction (legacy D+/D- and 1 or 2 SS pairs per direction). But each pair is self-clocking rather than synchronous, so I would still consider this serial not parallel.

                  gilesgoat@toot.walesG brouhaha@mastodon.socialB 2 Replies Last reply
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                  • bwh@tech.lgbtB bwh@tech.lgbt

                    @gilesgoat @brouhaha A bus is usually considered as being able to connect a variable number of devices without active bridges between them. USB originally worked that way, but USB 3.x SuperSpeed signals are strictly point-to-point.

                    As for serial, I think the objection is that there can be multiple data signals in each direction (legacy D+/D- and 1 or 2 SS pairs per direction). But each pair is self-clocking rather than synchronous, so I would still consider this serial not parallel.

                    gilesgoat@toot.walesG This user is from outside of this forum
                    gilesgoat@toot.walesG This user is from outside of this forum
                    gilesgoat@toot.wales
                    wrote last edited by
                    #17

                    @bwh @brouhaha I did NOT know that ! You mean USB 3.0 cannot be put into an USB hub ? And/or all USB hubs are 2.0 ?? .. so there are more data lines ? I must admit I never looked into electrical specifications, to me was already "too mind boggling/confusional" the protocol specifications ..

                    bwh@tech.lgbtB 1 Reply Last reply
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                    • gilesgoat@toot.walesG gilesgoat@toot.wales

                      @bwh @brouhaha I did NOT know that ! You mean USB 3.0 cannot be put into an USB hub ? And/or all USB hubs are 2.0 ?? .. so there are more data lines ? I must admit I never looked into electrical specifications, to me was already "too mind boggling/confusional" the protocol specifications ..

                      bwh@tech.lgbtB This user is from outside of this forum
                      bwh@tech.lgbtB This user is from outside of this forum
                      bwh@tech.lgbt
                      wrote last edited by
                      #18

                      @gilesgoat @brouhaha There are USB 3.x "hubs" but they are really more like switches. (And I think even USB 2.0 hubs work like switches for downstream devices that aren't High Speed.)

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                      • bwh@tech.lgbtB bwh@tech.lgbt

                        @gilesgoat @brouhaha A bus is usually considered as being able to connect a variable number of devices without active bridges between them. USB originally worked that way, but USB 3.x SuperSpeed signals are strictly point-to-point.

                        As for serial, I think the objection is that there can be multiple data signals in each direction (legacy D+/D- and 1 or 2 SS pairs per direction). But each pair is self-clocking rather than synchronous, so I would still consider this serial not parallel.

                        brouhaha@mastodon.socialB This user is from outside of this forum
                        brouhaha@mastodon.socialB This user is from outside of this forum
                        brouhaha@mastodon.social
                        wrote last edited by
                        #19

                        @bwh @gilesgoat
                        USB never worked that way. USB was _always_, from even before 1.0, point-to-point links. It was never possible to connect two devices to a single host port without a hub containing active electronics.

                        gilesgoat@toot.walesG 1 Reply Last reply
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                        • brouhaha@mastodon.socialB brouhaha@mastodon.social

                          @bwh @gilesgoat
                          USB never worked that way. USB was _always_, from even before 1.0, point-to-point links. It was never possible to connect two devices to a single host port without a hub containing active electronics.

                          gilesgoat@toot.walesG This user is from outside of this forum
                          gilesgoat@toot.walesG This user is from outside of this forum
                          gilesgoat@toot.wales
                          wrote last edited by
                          #20

                          @brouhaha @bwh I never knew that, I see why it's not really a bus then

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                          • etchedpixels@mastodon.socialE etchedpixels@mastodon.social

                            @0x0ddc0ffee @paul_ipv6 @brouhaha SNTP ?

                            0x0ddc0ffee@infosec.exchange0 This user is from outside of this forum
                            0x0ddc0ffee@infosec.exchange0 This user is from outside of this forum
                            0x0ddc0ffee@infosec.exchange
                            wrote last edited by
                            #21

                            @etchedpixels @paul_ipv6 @brouhaha Thankfully, I've never needed to know more about network time synchronization than how to enable the daemon and which sub-pool of pool.ntp.org to point it at, so I'm not in much of a position to judge. If you are, I'll take your word for it.

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