(The following diagram is available as an 8.5" x 11" page in DjVu
format. Click it to go to the downloadable image page and click that to
get a full-size image)

### Network diagram

![](HacDC_Network.djvu "HacDC_Network.djvu") *Diagram of classroom
network devices and cables,
traced and documented by Bobby circa 2019.03.18*

------------------------------------------------------------------------

The following text is almost verbatim from Bobby's e-mail message. I
have attempted basic formatting but it could use more reformatting work
(probably as a wiki table) to make it readable.

    On floor below clock:

      Netgear ProSAFE 16-Port Gigabit Click Switch
             1 - gray   - TP-Link Router 2
             2 - gray   - Printer (paper) computer
            14 - white  - open (by laser cutter)
            16 - orange - renderadmin computer
        others -          no connection

    On bottom shelf over sink:

      LinkSys VOIP Voice
        Phone    - phone cable - Uniden EX18560 phone
        Internet - blue        - LinkSys switch 6

      C7 TP-Link AC1750 Wireless Dual-Band Gigabit Router
        Internet   - blue   - D-Link switch
        Ethernet 1 - gray   - open
                 2 - yellow - TP-Link switch 7

    On middle shelf over sink:

      D-Link Wireless AC750 Dual-Band Router DIR-817LW
        LAN 4    - blue - TP-Link switch 8
        Internet - gray - LinkSys switch 5

      TP-Link TL-SG1008D Gigabit Switch
      (Numbering from left to right)
        1 - yellow - wall socket
        2 - gray   - Netgear switch 1
        3 - blue   - 3D printer computer
        4 -          no connection
        5 - black  - Linksys switch 1
        6 -          no connection
        7 - yellow - TP-Link router Ethernet 2
        8 - blue   - D-Link router LAN 4

      Linksys Gigabit 8-Port Workgroup Switch
      (Numbering from right to left)
        1 - black - TP-Link switch 5
        2 -         no connection
        3 - gray  - open (below HARC)
        4 - black - open (below HARC)
        5 - gray  - D-Link router Internet
        6 - blue  - Linksys VOIP Voice Internet
        7 - blue  - open (below HARC)
        8 -         no connection

    On table below TV screen:

      D-Link igreen DGS-1005D switch
        1 - blue   - TP-Link router Internet
        2 - gray   - open
        3 -          no connection
        4 -          no connection
        5 - yellow - TV computer

    If I read this right 3 of the 4 switches are unnecessary!