TEMPE, Ariz., June 4, 2012 (GLOBE NEWSWIRE) -- Limelight Networks, Inc.
(Nasdaq:LLNW) today announced that it will offer IPv6 support as part
of Limelight's content delivery service. As the world celebrates World
IPv6 Day by turning on IPv6, Limelight's offering supports customers'
ongoing transition to the next generation Internet protocol.

"The 21st century web is growing and it is being built on IPv6," said
Nathan Raciborski, Chief Technology Officer, Limelight Networks. "There
is a real risk to customers around business continuity as the IPv4
Internet starts fading. The rapidly diminishing number of IPv4
addresses will limit the number of end users and devices that connect
to an organization's digital presence. Having built one of the world's
ten largest networks, we understand how critical a customer's digital
presence is to their business. We are doing our part in speeding the
transition by ensuring that all customers, particularly subscriber
networks and content providers, are IPv6 enabled, at no charge."

Limelight Networks first introduced IPv6 support for its content
delivery services in 2009. The company has been enabling IPv6 access to
government public facing web properties for the last two years,
including NASA, in accordance with the Office of Management and Budget
(OMB) mandate to have all public services IPv6 enabled by the end of
2012.

The web is at a tipping point as the number of addresses available in
IPv4 rapidly run out due to the explosion in the number of people,
devices, and web services on the Internet. Already, Asia has run out of
IPv4 addresses and experts have predicted that Europe will run out
next.1 IPv6, the next-generation Internet protocol that provides more
than 340 trillion, trillion, trillion addresses, will support the
continued growth of Internet globally for years to come.

"Diminishing IP addresses should not be the only reason CIOs should be
making their transition plans now," continued Raciborski. "There's real
concern around ensuring a cost-effective transition. Even if your
organization has all the IPv4 addresses it needs, you will soon have to
coexist with many more IPv6 users, and to try to accommodate them
without a considered migration plan could result in service
interruptions and unplanned costs."

In celebration of World IPv6 Day on June 6, 2012, major ISPs, home
networking equipment manufacturers, and web companies including
Limelight are coming together to permanently enable IPv6 for their
products and services.

Limelight Networks' IPv6 capabilities include:


  --  Dual-stack (IPv4/IPv6) on the content delivery servers
  --  Native IPv6 routing across all network elements
  --  Full IPv6 routing table in all locations
  --  Full IPv6 Domain Name Services (DNS)
  --  IPv6 peering at IPv6 enabled internet exchanges as well as private
      network interconnects




About Limelight Networks, Inc.

Limelight Networks, Inc. (Nasdaq:LLNW) is a trusted provider of
integrated cloud-based applications that leverage Limelight's scalable,
high-performance, global computing platform. We give organizations
whose Internet, mobile, and social initiatives are absolutely critical
to their success a complete solution to upload, manage, publish,
monetize, accelerate, and analyze their online and mobile content. The
Limelight team of experts and end-to-end offering allow customers to
streamline all of the processes throughout the content lifecycle and
optimize the performance of content across all channels -- empowering
them to quickly and cost-effectively orchestrate a successful digital
presence that improves brand awareness, drives revenue, and enhances
customer relationships. For more information, please visit
www.limelight.com or follow us on Twitter at www.twitter.com/llnw.

Copyright (C) 2012 Limelight Networks, Inc. All rights reserved. All
product or service names are the property of their respective owners.

1 Vaughan-Nichols, Steven, "It's official: Asia's just run out of IPv4
addresses." ZDNet 14 April 2011: Web


CONTACT: Media Contact:
         Heather Miller
         +1.215.867.8600 x239
         media@llnw.com