Gartner said the WAN services market should grow at a compound annual growth rate of 4.5%-6.5% over the next five years. Large network operators will dominate the market, not so large operators, such as Telefonica, Singapore Telecoms, and Global Crossing, will represent roughly 15% of the market. Smaller specialized systems integrators, virtual network operators and global IT outsourcers will hold about 37% of this market.