VC EX4300 or Virtual Chassis

https://www.juniper.net/documentation/en_US/release-independent/junos/information-products/pathway-pages/ex-series/ex4300/ex4300.pdf

4x QSFP  / 40G at the Back ( can be use as VCP or Virtual Chassis Ports, By default, the built-in QSFP+ ports are configured as VCPs)

4x SPF+ / 10G at the from ( on Uplink Module)

https://www.juniper.net/documentation/en_US/junos/topics/concept/virtual-chassis-ex4200-overview.html#jd0e679