Juniper EX-UM-4SFP 4-Port 1G ethernet small form-factor pluggable (SFP) networking expansion module (optics sold separately). The Juniper EX-UM-4SFP is a high-performance switch module designed for the Juniper EX Series of switches. This module features four 1GB small form-factor pluggable (SFP) ports, allowing for flexible connectivity options and easy integration into existing network infrastructures.