The 4GE Security Services Module (SSM) is an optional I/O card for the adaptive security appliance. The 4GE SSM expands the total number of ports available on the security appliance, providing four additional ports with Ethernet (RJ-45) or SFP (fiber optic) connections. The ASA 5500 Four-Port Gigabit Ethernet Module enables security administrators to better segment network traffic and to create separate security zones, each complete with its own set of customized security policies. These separations can range from the Internet to internal corporate departments/sites, to DMZs.