UltraDNS™ Joins Cacheflow's Adaptive Content Exchange Partnership; Joint Solution To Enhance The Performance Of The Internet Infrastructure

Joint solution offers end-to-end infrastructure services by combining the benefits of a carrier-class directory services platform with cIQ content delivery solutions

San Mateo, Calif. March 13, 2001 - UltraDNS Corporation, the leading provider of directory infrastructure solutions that significantly enhance the reliability and performance of global, on-demand information exchange applications, today announced its membership in CacheFlow's (NASDAQ: CFLO) Adaptive Content Exchange partnership. As a part of the partnership, the companies will offer a combined solution that provides customers with UltraDNS' carrier-class Managed DNS Service in conjunction with CacheFlow's cIQ Content Delivery Solutions.

The joint solution between UltraDNS and CacheFlow will yield end-to-end Internet infrastructure solutions that leverage UltraDNS' highly scalable, manageable, and performance-oriented DNS (Domain Name System) server network within CacheFlow's cIQ Content Delivery Architecture. The result of the combined solution allows customers to provide the industries' most reliable QoS and QoE to their end users by addressing two fundamental building blocks of the Internet infrastructure: DNS and Content Acceleration. By improving the operation of these two key areas, customers will be able to re-focus resources on their corporate objectives while providing their end-users with significantly better performance, security, and reliability.

The Managed DNS Service is a fully integrated outsourced infrastructure service that provides primary and secondary Domain Name System (DNS) service hosted on UltraDNS Corporation's robust global DNS server network. An advanced fail-over mechanism ensures that all DNS queries are reliably processed and guarantees that every customer gets connected to their destination site regardless of Internet congestion. By utilizing advanced routing technologies, the DNS queries are processed by the closest available UltraDNS server, enabling customers to experience the fastest web site connections available. Web-based management interfaces and advanced data propagation technologies allow customer's network administrators to make changes directly to their DNS data and to have those changes propagate to all servers in the UltraDNS global server network within minutes. The company's Managed DNS Service is designed to solve the problems and limitations of today's DNS system, allowing customer's to increase ARPU, or Average Revenue Per User, reduce capital expenditures on unnecessary server equipment, and deliver the fastest, most reliable DNS resolution.

"UltraDNS is becoming an integral part of the Internet fabric by providing a complete tool set that meets the DNS reliability, manageability, scalability, and performance requirements that today's e-businesses, service providers, and enterprises demand", said Ben Petro, vice president of marketing for UltraDNS Corporation. "By leveraging our directory services platform with CacheFlow's content intelligent appliances, our customer's web enterprises will realize substantial performance improvements."

CacheFlow's solutions dramatically improve the speed and efficiency of moving static, streaming, secure, and application content. CacheFlow's unique cIQ product suite enables enterprises, e-businesses, and managed service providers to deliver the right content to the right place at the right time, increasing revenues and reducing costs, while delivering the ultimate end-user experience.

"Our marketing partnership with UltraDNS addresses the need for complementary solutions that fully interoperate in order to deliver better solutions to our joint customers," said Frank Cabri, director of product marketing with CacheFlow. "This underscores the need for smart network designs, such as CacheFlow's cIQ Content Delivery Architecture, to deliver content delivery solutions that scale and enhance end-user quality of experience, even in the face of ever-increasing usage and bandwidth demands."

About UltraDNS

Based in San Mateo, Calif., UltraDNS Corporation is a managed directory services company that offers advanced, service-based solutions that significantly improve the performance, reliability and scalability of next-generation global information exchange applications. The Company operates the first global managed directory services platform capable of delivering 100% reliable, guaranteed directory resolution for mission critical information-exchange applications. UltraDNS' Managed DNS Service is the first fully integrated, outsourced service for the Internet's Domain Name System (DNS) and is backed by a full Service Level Agreement (SLA). The Company was founded in l999. It is funded by Reuters Group PLC., VantagePoint Venture Partners, New Enterprise Associates, and Comdisco. Customers include Bluelight.com, FreeLotto, Petco.com, RealEstate.com, Fox Sports, and Robertson Stephens. For more information, visit www.ultradns.com.

About CacheFlow Inc.

CacheFlow is focused on content-smart networking--a new layer of infrastructure for intelligently accelerating, delivering, and managing static, streaming, and dynamic content. CacheFlow's market-leading appliances and innovative content delivery technologies delivered within its cIQ(tm) content-delivery architecture enable enterprises, service providers and content delivery network providers to deliver the right content to the right place at the right time. Based in Sunnyvale, California, CacheFlow can be contacted via telephone at (408) 220-2200, fax at (408) 220-2250 or email at info@cacheflow.com.

About CacheFlow's Adaptive Content Exchange (ACE) Partnership

ACE is CacheFlow's A-list of industry-leading partners that leverage cIQ technology to provide enhanced switching, content filtering, security, multimedia services, reporting, and content augmentation components for CacheFlow cIQ Content Delivery Solutions.

About UltraDNS
UltraDNS Corporation is the world's leading Managed DNS Service Provider, delivering superior security, reliability and performance to organizations that rely on DNS for their critical business processes, applications and services. With the growth in e-commerce and the emergence of advanced DNS-based communication and supply chain management services, organizations can no longer rely on traditional approaches to DNS. On October 20th, 2005 UltraDNS launched the DNS Shield™ in partnership with major Internet Service Providers (ISPs) including AOL, Earthlink, Time Warner and Yahoo to provide the highest level of reliability and security to over 100 million Internet users.

UltraDNS provides a range of global and local DNS solutions - both managed services and custom infrastructure - built on its unique Directory Services Platform and proprietary, patented technologies. Through its thousands of enterprise, service provider and TLD infrastructure customers, UltraDNS powers the resolution of over 15 million domains around the globe. UltraDNS has offices in California, Virginia, Arizona, Chicago and the UK. For more information please visit www.ultradns.com.

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