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The Catalyst 3920 is a stackable switch that provides the following:
• Expandable configuration up to 8 switches
• Low-latency, cut-through switching in a variety of bridging and switching modes
• Configurable ports that can function in half-duplex (HDX) or full-duplex (FDX) modes, as a
concentrator or end station
• Transmission priority queues
• Ability to filter frames based on Media Access Control (MAC) address or protocol
• Notification of port errors and beacon situations
• Support for the Cisco Discovery Protocol (CDP)
• Ability to subdivide the switch into virtual LANs (VLANs)
• Support for Simple Network Management Protocol (SNMP)-based management
• Optional remote monitoring (RMON) support
• Ability to monitor port traffic

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# Switch works right out of the box—no configuration or management software necessary
# Nonblocking performance means improved access to network resources
# 10/100 auto-negotiation automatically determines the correct port speed
# Automatic MDI/MDIX on all ports simplifies setup by enabling direct connection to another device using straight-through or crossover cables
# Sturdy design and build quality ensure reliable operation and long life
# Can be rack-mounted or stacked to maximize space; standard 1RU form factor simplifies space planning

# Ports:  24 autosensing, auto-configuration MDI/MDIX 10BASE-T/100BASE-TX
# Media interfaces: RJ-45
# Ethernet switching features: Full-rate nonblocking on all Ethernet ports, full/half duplex auto-negotiation and flow control
# MAC addresses supported: 4,000

# Height: 4.4 cm (1.7 in)
# Width: 44 cm (17.3 in)
# Depth: 17.3 cm (6.8 in)
# Weight: 1.5 kg (3.07 lb)