The Cisco Catalyst 4500 12-port E-Series 10 Gigabit Ethernet line card (2.5:1 oversubscribed) can be deployed for high-performance and high-density 10 Gigabit Ethernet aggregation in the campus and in small to medium-sized networks as a core switch. The Cisco Catalyst 4500E Series 12-port 10 Gigabit Ethernet line card supports standard Small Form-Factor Pluggable Plus (SFP+) optics. The ports can be used interchangeably as Gigabit Ethernet and 10 Gigabit Ethernet to support phased migration from Gigabit Ethernet to 10 Gigabit Ethernet.