Welcome to the homepage of Cormac Long, internetworking consultant and technology author. Cormac Long has worked extensively in the internetworking field and is the author of two books on the technology. "Cisco Internetworking and Troubleshooting" published by McGraw-Hill in November 1999 and "IP Network Design" from the same publisher in February 2001. ArdRi Communications is a company set up by Cormac Long that provides advanced consultancy and customised training solutions for corporate customers. Click on the appropriate section to view the training and consulting services offered. All services are provided directly by Cormac Long enabling the customer to gain the full benefit of his industry experience. The company specialises in the provision of technical solutions for local and wide area networking, in particular: - Network Design - Network Configuration and Installation - Network Auditing and Security solutions - Troubleshooting and Management Services - Staff Training: Customised training solutions can be provided on-site for your technical staff. The 'Cisco Tutor' on this site provides an array of FREE internetworking technical tips on design, configuration and troubleshooting of LAN and WAN protocols, with an emphasis on Cisco routers and switches. The information included in the Cisco Tutor is intended as an on the job training and reference guide for internetworking professionals, as well as assisting those pursuing any of the Cisco Certifications including CCIE. The IP Reference section is a generic source of technical information relating to the increasingly diverse applications of the Internet Protocol. Contact: ArdRi Communications Ltd. 39 Leinster Park, Harold’s Cross, Dublin 6, Ireland Tel.: +353-1-4971508, Fax: +353-1-4971508