The communications landscape is dominated by two differing technologies: Ethernet in the LAN for internal business communications; and SONET/SDH in the WAN. In the enterprise landscape
where network reliability is paramount
Ethernet has been the pervasive data network protocol. Ethernet is simple
efficient and sufficiently reliable for the Local Area Network (LAN) environment. The article introduces Virtual Concatenation(VC) and Generic Framing Protocol(GFP).