The EX4200 line offers 24- and 48-port fixed-configuration 10/100/1000BASE-T platforms with full (all ports) and partial (eight ports) Power over Ethernet (PoE) options. A 24-port 100BASE-FX/1000BASE-X SFP-based fiber platform, designed for gigabit aggregation deployments requiring support for long-distance links, is also available. Optional four-port Gigabit Ethernet (GbE) and two-port 10GbE uplink modules with pluggable optics are also available.

When deployed in a Virtual Chassis configuration, EX4200 switches share a common Junos operating system and configuration file, greatly simplifying system operations, maintenance and troubleshooting. Interconnections can also be made over the 10GbE uplink ports, so members of the same Virtual Chassis configuration can be in different wiring closets, on different floors or even in different buildings, and still be managed as a single device.