Dell OptiPlex Small Form Factor 7020 Owner's Manual page 10

Connect a security cable to prevent unauthorized movement of your computer.
4. External antenna slot
Connect an external antenna for better connectivity.
5. Network port
Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access.
6. Power-supply diagnostic light
Indicates the power-supply state.
7. Power-cord connector port
Connect a power cable to provide power to your computer.
8. Two expansion card slots
Connect a PCI-Express card such as graphics, audio, or network card to enhance the capabilities of your computer.
9. Two USB 2.0 (480 Mbps) with SmartPower On ports
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 480 Mbps.
NOTE: When USB wake is enabled in the BIOS, the computer turns on or wake from hibernation when a USB mouse or
keyboard that is connected to this port is used.
10. Two USB 3.2 Gen 1 (5 Gbps) ports
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 5 Gbps.
11. DisplayPort 1.4a (HBR2 support) port
Connect an external display or a projector.
NOTE: The maximum resolution that is supported is up to 4096x2304 @60Hz.
12. HDMI 1.4b port
Connect to a TV, external display, or another HDMI-in enabled device. Provides video and audio output.
NOTE: The maximum resolution that is supported is up to 1920 x 1200 @ 60Hz.
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