Mark Schofield has been a network architect at Bell Canada for the past six years. Working for the largest service provider in Canada, he has designed Multiprotocol Layer Switching (MPLS) virtual private networks (VPNs) with IP quality of service (QoS) for large enterprise customers. During the past five years at Bell, he has been involved in the design, implementation, and planning of large national networks for Bell Canada’s federal government customers. As part of a cross-company team, he developed Bell Canada’s premier MPLS VPN product. Mark has a MLIS from the University of Western Ontario and a B.A. and M.A. degrees from the University of Guelph. Industry certifications include the Cisco Certified Systems Instructor (CCIP), Cisco Certified Network Professional (CCNP), Citrix Certified Enterprise Administrator (CCEA), and Microsoft Certified Systems Engineer (MCSE).