State of the Art and Recent Research Advances in Software Defined Networking

Table 1

Complementary technologies.

Functionality	Control functions, APIs	Complementary technologies
Centralized control	Centralized/delegated control framework	NCP [12], BSD4.4 Routing Sockets [13], ForCES [14], PCE [16], OPENSIG [17], GSMP [18], 4D [19], Ethane [20], G/MPLS [15]
Network programmability	Low-level network abstraction	Active Networks [24], XMPP [26], DCAN [25]
	High-level network abstraction	ALTO [27], I2RS [28], Cisco onePK [29]
	Configuration API	NETCONF [30], SNMP [31], GeoPlex [32]
Virtualization	Network device virtualization and overlays	Tempest [33], VINI [34], Cabo [35], VXLAN [36], NVGRE [37], STT [38]