QFX5100-24Q-AFI QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 AC power supplies, back to front airflow QFX5100-24Q-AFO QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 AC power supplies, front to back airflow QFX5100-24Q-DC-AFI QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 DC power supplies, back to front airflow QFX5100-24Q-DC-AFO QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 DC power supplies, front to back airflow QFX5100-48S-AFI QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2 AC power supplies, back to front airflow QFX5100-48S-AFO QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2 AC power supplies, front to back airflow QFX5100-48S-DC-AFI QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2 DC power supplies, back to front airflow QFX5100-48S-DC-AFO QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2 DC power supplies, front to back airflow EX-4PST-RMK Adjustable 4-post rack-mount kit for EX and QFX5100 JPSU-650W-AC-AFI Juniper 650W AC Power Supply for EX4550, QFX3500 and QFX3600 (PSU-side airflow intake) JPSU-650W-AC-AFO Juniper 650W AC Power Supply for EX4550, QFX3500 and QFX3600 (PSU-side airflow exhaust) JPSU-650W-DC-AFI Juniper 650W DC Power Supply for EX4550, QFX3500 and QFX3600 (PSU-side airflow intake) JPSU-650W-DC-AFO Juniper 650W DC Power Supply for EX4550, QFX3500 and QFX3600 (PSU-side airflow exhaust)