SG 100-16 16-Port Gigabit Switch. The Cisco SG 100-16 16-Port Gigabit Switch, a Cisco Small Business Unmanaged Switch, will boost your network performance and support all of your essential business applications. This switch works right out of the box and does not require any management or configuration. An energy-saving design and quality of service (QoS) enhance network performance. The Cisco SG 100-16 is protected by a limited lifetime warranty.