The Preliminary Price Range necessarily assumes the consummation of a successful initial public offering and the creation of a public market for the Common Stock by the end of July 2012. It therefore excludes any marketability or illiquidity discount for the Common Stock, which was appropriately taken into account in the Valuation Report, which was prepared as of a date approximately three months prior to the date of the Company’s proposed initial public offering. In this regard, we note that even for companies in registration there is a substantial probability of an IPO being delayed or cancelled. According to a June 15, 2012, article in The Wall Street Journal entitled “June’s Likely U.S. IPO Tally: A Fat Zero”, since mid-May “no IPOs have priced, and 14 have been withdrawn.”

The Preliminary Price Range does not assign any weighting to any other outcome for the Company’s business, such as an acquisition of the Company or a delay in the expected timing for the initial public offering. In contrast, the Valuation Report applied an 80% weighting to the PWERM under an initial public offering scenario, resulting in an indicated value of $21.70 per share, and a 20% weighting to the option pricing method under a merger and acquisition scenario, resulting in an indicated value for the Common Stock of $14.11 per share. In addition, the PWERM analysis in the Valuation Report modeled potential initial public offerings under two

different time horizons (July 2012 and January 2013) and assigned probabilities to each scenario to determine the Company’s enterprise value. More specifically, the PWERM assigned an 80% probability to a July 2012 initial public offering and a 20% probability to a January 2013 initial public offering with a resulting present value that was lower than the July 2012 analysis, reflecting the longer time horizon.

In June 2012, the Company hired a new Senior Vice President of Worldwide Field Operations as part of its continued focus on investing in sales and marketing to drive revenue growth.

As described on page 75 of Amendment No. 2, when considering which companies to include in the Company’s comparable company analysis, the Company focused on companies that address components of the network security market and networking companies with similar business models, namely, generating revenue from the sale of both products and services, market capitalization greater than $1 billion, revenue growth rates generally greater than 10%, and net income and positive cash flow from operating activities. The Company recognized that many companies that had recently completed initial public offerings, such as LinkedIn, Jive and Splunk, have business models and target markets that are not comparable to the Company. Therefore, the Company more strongly considered relevant revenue multiples from high growth companies that address a component of the network security market and networking leaders with a similar business model.

While the Lead Underwriters also believed that network security companies and networking leaders were relevant comparables, they placed a greater emphasis on high growth enterprise software (including SaaS) companies, such as LinkedIn, Cornerstone, Splunk, Jive, Demandware, Bazaarvoice and NetSuite. The Lead Underwriters placed a greater emphasis on these companies because their revenue growth rates and near-term margin profiles are more similar to the Company than those of the network security companies and networking leaders. These high growth enterprise software companies generally have higher revenue multiples than those companies addressing the Company’s target network security market or having similar networking business models. As a result, the Preliminary Price Range reflects the application of a higher revenue multiple to the Company’s revenue forecast than the multiple used in the Valuation Report.

The Lead Underwriters’ Preliminary Price Range took into account the recent performance and valuation of companies that they feel may potentially be viewed by certain investors as comparable to the Company and the recent performance of such companies with successful initial public offerings outside of the Company’s target network security market. For example, Splunk, a company that provides a software platform that enables organizations to gain operational intelligence, priced its initial public offering at $17.00 per share on April 18, 2012. The closing price of Splunk’s common stock on June 14, 2012 was $31.66 per share, representing an 86.2% increase from the initial public offering price and a revenue multiple over 13x market analysts’ forward looking revenue forecasts.

Both the Lead Underwriters’ valuation model dated June 15, 2012 and the Valuation Report dated April 30, 2012 relied on forward looking revenue forecasts. However, the Lead Underwriters’ valuation model was generated one and a half months after the Valuation Report and applied a revenue multiple to their projections of the Company’s revenue for calendar year ended December 31, 2013, consistent with their expectation that public investors will use calendar multiples for

valuation purposes, as opposed to the Valuation Report, which relied on revenue forecasts for the fiscal year ended July 31, 2013. Because the Company and Lead Underwriters expect continued growth in its business during the remainder of calendar year 2013, the Lead Underwriters’ valuation models applied a revenue multiple to a higher revenue estimate.