Ex 3200 Switches; Ex 4200 Switches - Juniper EX Series Complete Hardware Manual

Complete Hardware Guide for EX 3200 and EX 4200 Switches
Both lines have these features:

EX 3200 Switches

EX 3200 switches provide connectivity for low-density environments. Typically, you
deploy these switches in branch environments or wiring closets where only one
switch is required.
EX 3200 switches are available in models with either 24 or 48 ports and with either
all ports equipped for Power over Ethernet (PoE) or only 8 ports equipped for PoE.
All ports have 10/100/1000Base-T Gigabit Ethernet connectors.
EX 3200 switches include:

EX 4200 Switches

EX 4200 switches provide connectivity for medium- and high-density environments
and scalability for growing networks. These switches can be deployed wherever you
need a high density of Gigabit Ethernet ports (24 to 480 ports) or redundancy.
Typically, EX 4200 switches are used in large branch offices, campus wiring closets,
and data centers where they can be positioned as the top device in a rack to provide
connectivity for all the devices in the rack.
You can connect individual EX 4200 switches together to form one unit and manage
the unit as a single chassis, called a virtual chassis. You can add more member
switches to the virtual chassis as needed, up to a total of 10 members.
EX 4200 switches are available in models with 24 or 48 ports and with either all
ports equipped for Power over Ethernet (PoE) or only 8 ports equipped for PoE. All
models provide ports that have 10/100/1000Base-T Gigabit Ethernet connectors and
optional small form-factor pluggable (SFP) transceivers or 10-gigabit small form-factor
pluggable (XFP) transceivers for use with fiber connections.
Additionally, a 24-port model provides 100Base-FX/1000Base-X SFP transceivers.
This model is typically used as a small distribution switch.
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EX-series Switch Hardware Overview
Run under JUNOS software for EX-series switches
Have options of 24-port and 48-port models
Have options of full (all ports) or partial (8 ports) Power over Ethernet (PoE)
capability
Have optional uplink modules that provide connection to distribution switches
A field-replaceable power supply and an optional additional connection to an
external power source.
A field-replaceable fan tray with single fan.
JUNOS software with its modular design that enables failed system processes to
gracefully restart.