Cisco 2-Port Ethernet WAN Network Interface Module is known to improve the functionality of your Cisco Systems with the assistance of Cisco Expansion Module. It is functional as a plug-in module which has been made to follow the protocol of Gigabit Ethernet data link. It has been featured with two Combo Gigabit SFP docks and two 1000Base-X RJ-45 connectors. Cisco 2-Port Ethernet WAN Network Interface Module functions with the router of Cisco 4451-X. It provides maximum flexibility and stops Layer 2 trunks. Other benefits are network reliability and zero requirement of a separate switch.