in particular , we experience higher revenue in the fourth quarter of each year for some of our solutions as a result of holiday season activity . in addition , we experience quarterly variations in revenue attributable to , among other things , the nature and timing of software and gaming releases by our customers using our software download solutions ; whether there are large live sporting or other events that increase the amount of media traffic on our network ; and the frequency and timing of purchases of custom solutions . expenses our level of profitability is also impacted by our expenses , including direct costs to support our revenue such as bandwidth and co-location costs . we have observed the following trends related to our profitability in recent years : our profitability improved significantly in 2018 as compared to 2017 due to higher revenues as well as the effects of cost savings and efficiency initiatives we have undertaken . we expect to continue to undertake efforts intended to improve the efficiency of operations . we anticipate profitability improvement in 2019 but at a lower rate as compared to 2018. we believe we can achieve additional improvement in 2020. network bandwidth costs represent a significant portion of our cost of revenue . historically , we have been able to mitigate increases in these costs by reducing our network bandwidth costs per unit and investing in internal-use software development to improve the performance and efficiency of our network . our total bandwidth costs may increase in the future as a result of expected higher traffic levels and serving more traffic from higher cost regions . we will need to continue to effectively manage our bandwidth costs to maintain current levels of profitability . 22 co-location costs are also a significant portion of our cost of revenue . by improving our internal-use software and managing our hardware deployments to enable us to use servers more efficiently , we have been able to manage the growth of co-location costs . we expect to continue to scale our network in the future and will need to continue to effectively manage our co-location costs to maintain current levels of profitability . payroll and related compensation costs grew in 2018 due to headcount increases in 2017 , particularly in our professional services and engineering teams to support our revenue growth and strategic initiatives . during the year ended december 31 , 2017 we increased our headcount by approximately 1,100 employees , while headcount remained relatively flat during 2018. we expect to continue to hire employees , both domestically and internationally , in support of our strategic initiatives but do not expect overall headcount to increase significantly in 2019. depreciation and amortization expense related to our network equipment and internal-use software development costs increased by $ 51.2 million during 2018 as compared to 2017. due to the software and hardware initiatives we have undertaken to manage our global network more efficiently , we expect the useful lives of our network assets to be extended . this change is expected to decrease depreciation expense related to our network equipment during 2019 as compared to 2018. we retrospectively adopted the new accounting standard for revenue recognition on january 1 , 2018 ; accordingly , prior period results have been revised for the adoption of the new standard . the changes to our revenue recognition approach under this new standard primarily impact the timing of recognizing revenue from a small number of licensed software customers . there is little impact to revenue from our core web and media solutions . as a result of the change , we also began capitalizing certain commission and incentive payments . the revisions as a result of adopting the new standard did not have a material impact on our annual revenue or results of operations , but did cause quarter-over-quarter fluctuations . we report our revenue by division , which is a customer-focused reporting view that reflects revenue from customers that are managed by the division . as of january 1 , 2018 , we now report our revenue in two divisions compared to the three divisions reported in 2017 ; the media division and enterprise and carrier division were combined to form the new media and carrier division . as the purchasing patterns and required account expertise of customers change over time , we may reassign a customer from one division to another . in 2018 , we reassigned some of our customers from the media and carrier division to the web division and revised historical results in order to reflect the most recent categorization and to provide a comparable view for all periods presented . 23 results of operations the following sets forth , as a percentage of revenue , consolidated statements of income data for the years indicated : replace_table_token_2_th revenue revenue during the periods presented is as follows ( in thousands ) : replace_table_token_3_th the increase in our revenue in 2018 as compared to 2017 was primarily the result of higher media traffic volumes , increased sales of our new product offerings and continued strong growth in our cloud security solutions . cloud security solutions revenue for the year ended december 31 , 2018 was $ 657.9 million , compared to $ 485.5 million for the year ended december 31 , 2017 , which represents a 35.5 % increase . the increase in our revenue in 2017 as compared to 2016 was primarily the result of continued strong growth from our cloud security solutions and from new product introductions . overall , however , the revenue growth rates for 2017 were negatively impacted by the `` do-it-yourself `` efforts of our internet platform customers . cloud security solutions revenue for the year ended december 31 , 2017 was $ 485.5 million , compared to $ 369.0 million for the year ended december 31 , 2016 , which represents a 31.6 % increase . story_separator_special_tag for the year ended december 31 , 2017 , the net impact of the tcja described above was a provisional net tax expense of $ 26.0 million which is comprised of a one-time transition tax expense of $ 43.4 million on the mandatory deemed repatriation of cumulative foreign earnings as of december 31 , 2017 , offset by a $ 17.4 million tax benefit related to the re-measurement of deferred tax assets and liabilities due to the lower corporate income tax rate . as of december 31 , 2018 , we have finalized the 30 accounting for all of the tax effects of the tcja and recorded a reduction of the transition tax expense of $ 5.5 million and an increase to the tax benefit related to the re-measurement of deferred tax assets and liabilities of $ 2.4 million . for the year ended december 31 , 2016 , our effective income tax rate was lower than the federal statutory tax rate due to the composition of income from foreign jurisdictions that is taxed at lower rates compared to the statutory tax rates in the u.s. , the domestic production activities deduction and u.s. federal , state and foreign research and development credits , partially offset by the effects of stock-based compensation in accordance with authoritative guidance for share-based payments and state income taxes . the decrease in the provision for income taxes for 2018 as compared to 2017 was mainly due to the reduction in the u.s. federal statutory tax rate from 35.0 % to 21.0 % as part of the tcja that was enacted in december 2017 , an increase in the excess tax benefit related to stock-based compensation and the net impact of the tcja recorded in 2017. these amounts were partially offset by an intercompany sale of intellectual property and an increase in non-deductible executive compensation . the decrease in the provision for income taxes for 2017 as compared to 2016 was mainly due to a decrease in profit before tax , the re-measurement of deferred taxes at lower tax rates expected to be in place upon realization as a result of the tcja , the impacts of the release of an acquisition-related reserve due to the expiration of the relevant statute of limitations and an increase in u.s. federal , state and foreign research and development credits . these benefits were partially offset by a decrease in the domestic production activities deduction and a provisional charge for the one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as a result of the tcja . our effective income tax rate may fluctuate between fiscal years and from quarter to quarter due to items arising from discrete events , such as tax benefits from the disposition of employee equity awards , tax law changes and settlements of tax audits and assessments . our effective income tax rate is also impacted by , and may fluctuate in any given period because of , the composition of income in foreign jurisdictions where tax rates differ depending on the local statutory rates . refer to note 18 to the consolidated financial statements included elsewhere in this annual report on form 10-k for additional information regarding unrecognized tax benefits that , if recognized , would impact the effective income tax rate in the next 12 months and for the potential impact that current litigation related to an adverse audit finding could have on our results of operations . non-gaap financial measures in addition to providing financial measurements based on accounting principles generally accepted in the u.s. , or gaap , we publicly discuss additional financial measures that are not prepared in accordance with gaap , or non-gaap financial measures . management uses non-gaap financial measures , in addition to gaap financial measures , to understand and compare operating results across accounting periods , for financial and operational decision-making , for planning and forecasting purposes , to set executive compensation and to evaluate our financial performance . these non-gaap financial measures are : non-gaap income from operations , non-gaap operating margin , non-gaap net income , non-gaap net income per diluted share , adjusted ebitda , adjusted ebitda margin and impact of foreign currency exchange rates , as discussed below . management believes that these non-gaap financial measures reflect our ongoing business in a manner that facilitates meaningful comparisons and analysis of trends in the business , as they assist in the comparison of financial results across accounting periods and to those of our peer companies . management also believes that these non-gaap financial measures enable investors to evaluate our operating results and future prospects in the same manner as management . these non-gaap financial measures may exclude expenses and gains that may be unusual in nature , infrequent or not reflective of our ongoing operating results . the non-gaap financial measures do not replace the presentation of our gaap financial measures and should only be used as a supplement to , not as a substitute for , our financial results presented in accordance with gaap . 31 the non-gaap adjustments , and our basis for excluding them from non-gaap financial measures , are outlined below : amortization of acquired intangible assets – we have incurred amortization of intangible assets , included in our gaap financial statements , related to various acquisitions we have made . the amount of an acquisition 's purchase price allocated to intangible assets and term of its related amortization can vary significantly and are unique to each acquisition ; therefore , we exclude amortization of acquired intangible assets from our non-gaap financial measures to provide investors with a consistent basis for comparing pre- and post-acquisition operating results . stock-based compensation and amortization of capitalized stock-based compensation – although stock-based compensation is an important aspect of the compensation paid to our employees , the grant date fair value varies based on the stock price at the time of grant , varying valuation methodologies , subjective

cash used in investing activities replace_table_token_19_th the increase in cash used in investing activities in 2018 as compared to 2017 was driven by marketable securities activities . in 2017 we did not reinvest all proceeds from sales and maturities of our marketable securities which created a cash inflow in that year . the increase in cash used in investing activities in 2018 as compared to 2017 was partially offset by the cash paid in 2017 for the acquisitions of nominum , inc. and soasta , inc. the decrease in cash used in investing activities in 2017 as compared to 2016 was driven by a decrease in marketable securities activities . this was offset by the funding our 2017 acquisitions of nominum and soasta . we also increased our purchases of property and equipment in 2017 as compared to 2016 to support both network and facility expansion . subsequent to december 31 , 2018 , we acquired janrain , inc. , a provider of customer identity access management solutions , for $ 125.0 million . the all-cash transaction closed in january 2019. cash provided by ( used in ) financing activities replace_table_token_20_th the increase in cash provided by financing activities during 2018 as compared to 2017 was the result of our convertible senior notes issued in may 2018 and related note hedge and warrant transactions . the increase was partially offset by an increase in shares repurchased under our repurchase programs . the increase in cash used in financing activities during 2017 as compared to 2016 was primarily due to an increase in employee taxes paid related to net share settlement of stock-based awards .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash used in investing activities replace_table_token_19_th the increase in cash used in investing activities in 2018 as compared to 2017 was driven by marketable securities activities . in 2017 we did not reinvest all proceeds from sales and maturities of our marketable securities which created a cash inflow in that year . the increase in cash used in investing activities in 2018 as compared to 2017 was partially offset by the cash paid in 2017 for the acquisitions of nominum , inc. and soasta , inc. the decrease in cash used in investing activities in 2017 as compared to 2016 was driven by a decrease in marketable securities activities . this was offset by the funding our 2017 acquisitions of nominum and soasta . we also increased our purchases of property and equipment in 2017 as compared to 2016 to support both network and facility expansion . subsequent to december 31 , 2018 , we acquired janrain , inc. , a provider of customer identity access management solutions , for $ 125.0 million . the all-cash transaction closed in january 2019. cash provided by ( used in ) financing activities replace_table_token_20_th the increase in cash provided by financing activities during 2018 as compared to 2017 was the result of our convertible senior notes issued in may 2018 and related note hedge and warrant transactions . the increase was partially offset by an increase in shares repurchased under our repurchase programs . the increase in cash used in financing activities during 2017 as compared to 2016 was primarily due to an increase in employee taxes paid related to net share settlement of stock-based awards .
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 Suspicious Activity Report : in particular , we experience higher revenue in the fourth quarter of each year for some of our solutions as a result of holiday season activity . in addition , we experience quarterly variations in revenue attributable to , among other things , the nature and timing of software and gaming releases by our customers using our software download solutions ; whether there are large live sporting or other events that increase the amount of media traffic on our network ; and the frequency and timing of purchases of custom solutions . expenses our level of profitability is also impacted by our expenses , including direct costs to support our revenue such as bandwidth and co-location costs . we have observed the following trends related to our profitability in recent years : our profitability improved significantly in 2018 as compared to 2017 due to higher revenues as well as the effects of cost savings and efficiency initiatives we have undertaken . we expect to continue to undertake efforts intended to improve the efficiency of operations . we anticipate profitability improvement in 2019 but at a lower rate as compared to 2018. we believe we can achieve additional improvement in 2020. network bandwidth costs represent a significant portion of our cost of revenue . historically , we have been able to mitigate increases in these costs by reducing our network bandwidth costs per unit and investing in internal-use software development to improve the performance and efficiency of our network . our total bandwidth costs may increase in the future as a result of expected higher traffic levels and serving more traffic from higher cost regions . we will need to continue to effectively manage our bandwidth costs to maintain current levels of profitability . 22 co-location costs are also a significant portion of our cost of revenue . by improving our internal-use software and managing our hardware deployments to enable us to use servers more efficiently , we have been able to manage the growth of co-location costs . we expect to continue to scale our network in the future and will need to continue to effectively manage our co-location costs to maintain current levels of profitability . payroll and related compensation costs grew in 2018 due to headcount increases in 2017 , particularly in our professional services and engineering teams to support our revenue growth and strategic initiatives . during the year ended december 31 , 2017 we increased our headcount by approximately 1,100 employees , while headcount remained relatively flat during 2018. we expect to continue to hire employees , both domestically and internationally , in support of our strategic initiatives but do not expect overall headcount to increase significantly in 2019. depreciation and amortization expense related to our network equipment and internal-use software development costs increased by $ 51.2 million during 2018 as compared to 2017. due to the software and hardware initiatives we have undertaken to manage our global network more efficiently , we expect the useful lives of our network assets to be extended . this change is expected to decrease depreciation expense related to our network equipment during 2019 as compared to 2018. we retrospectively adopted the new accounting standard for revenue recognition on january 1 , 2018 ; accordingly , prior period results have been revised for the adoption of the new standard . the changes to our revenue recognition approach under this new standard primarily impact the timing of recognizing revenue from a small number of licensed software customers . there is little impact to revenue from our core web and media solutions . as a result of the change , we also began capitalizing certain commission and incentive payments . the revisions as a result of adopting the new standard did not have a material impact on our annual revenue or results of operations , but did cause quarter-over-quarter fluctuations . we report our revenue by division , which is a customer-focused reporting view that reflects revenue from customers that are managed by the division . as of january 1 , 2018 , we now report our revenue in two divisions compared to the three divisions reported in 2017 ; the media division and enterprise and carrier division were combined to form the new media and carrier division . as the purchasing patterns and required account expertise of customers change over time , we may reassign a customer from one division to another . in 2018 , we reassigned some of our customers from the media and carrier division to the web division and revised historical results in order to reflect the most recent categorization and to provide a comparable view for all periods presented . 23 results of operations the following sets forth , as a percentage of revenue , consolidated statements of income data for the years indicated : replace_table_token_2_th revenue revenue during the periods presented is as follows ( in thousands ) : replace_table_token_3_th the increase in our revenue in 2018 as compared to 2017 was primarily the result of higher media traffic volumes , increased sales of our new product offerings and continued strong growth in our cloud security solutions . cloud security solutions revenue for the year ended december 31 , 2018 was $ 657.9 million , compared to $ 485.5 million for the year ended december 31 , 2017 , which represents a 35.5 % increase . the increase in our revenue in 2017 as compared to 2016 was primarily the result of continued strong growth from our cloud security solutions and from new product introductions . overall , however , the revenue growth rates for 2017 were negatively impacted by the `` do-it-yourself `` efforts of our internet platform customers . cloud security solutions revenue for the year ended december 31 , 2017 was $ 485.5 million , compared to $ 369.0 million for the year ended december 31 , 2016 , which represents a 31.6 % increase . story_separator_special_tag for the year ended december 31 , 2017 , the net impact of the tcja described above was a provisional net tax expense of $ 26.0 million which is comprised of a one-time transition tax expense of $ 43.4 million on the mandatory deemed repatriation of cumulative foreign earnings as of december 31 , 2017 , offset by a $ 17.4 million tax benefit related to the re-measurement of deferred tax assets and liabilities due to the lower corporate income tax rate . as of december 31 , 2018 , we have finalized the 30 accounting for all of the tax effects of the tcja and recorded a reduction of the transition tax expense of $ 5.5 million and an increase to the tax benefit related to the re-measurement of deferred tax assets and liabilities of $ 2.4 million . for the year ended december 31 , 2016 , our effective income tax rate was lower than the federal statutory tax rate due to the composition of income from foreign jurisdictions that is taxed at lower rates compared to the statutory tax rates in the u.s. , the domestic production activities deduction and u.s. federal , state and foreign research and development credits , partially offset by the effects of stock-based compensation in accordance with authoritative guidance for share-based payments and state income taxes . the decrease in the provision for income taxes for 2018 as compared to 2017 was mainly due to the reduction in the u.s. federal statutory tax rate from 35.0 % to 21.0 % as part of the tcja that was enacted in december 2017 , an increase in the excess tax benefit related to stock-based compensation and the net impact of the tcja recorded in 2017. these amounts were partially offset by an intercompany sale of intellectual property and an increase in non-deductible executive compensation . the decrease in the provision for income taxes for 2017 as compared to 2016 was mainly due to a decrease in profit before tax , the re-measurement of deferred taxes at lower tax rates expected to be in place upon realization as a result of the tcja , the impacts of the release of an acquisition-related reserve due to the expiration of the relevant statute of limitations and an increase in u.s. federal , state and foreign research and development credits . these benefits were partially offset by a decrease in the domestic production activities deduction and a provisional charge for the one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as a result of the tcja . our effective income tax rate may fluctuate between fiscal years and from quarter to quarter due to items arising from discrete events , such as tax benefits from the disposition of employee equity awards , tax law changes and settlements of tax audits and assessments . our effective income tax rate is also impacted by , and may fluctuate in any given period because of , the composition of income in foreign jurisdictions where tax rates differ depending on the local statutory rates . refer to note 18 to the consolidated financial statements included elsewhere in this annual report on form 10-k for additional information regarding unrecognized tax benefits that , if recognized , would impact the effective income tax rate in the next 12 months and for the potential impact that current litigation related to an adverse audit finding could have on our results of operations . non-gaap financial measures in addition to providing financial measurements based on accounting principles generally accepted in the u.s. , or gaap , we publicly discuss additional financial measures that are not prepared in accordance with gaap , or non-gaap financial measures . management uses non-gaap financial measures , in addition to gaap financial measures , to understand and compare operating results across accounting periods , for financial and operational decision-making , for planning and forecasting purposes , to set executive compensation and to evaluate our financial performance . these non-gaap financial measures are : non-gaap income from operations , non-gaap operating margin , non-gaap net income , non-gaap net income per diluted share , adjusted ebitda , adjusted ebitda margin and impact of foreign currency exchange rates , as discussed below . management believes that these non-gaap financial measures reflect our ongoing business in a manner that facilitates meaningful comparisons and analysis of trends in the business , as they assist in the comparison of financial results across accounting periods and to those of our peer companies . management also believes that these non-gaap financial measures enable investors to evaluate our operating results and future prospects in the same manner as management . these non-gaap financial measures may exclude expenses and gains that may be unusual in nature , infrequent or not reflective of our ongoing operating results . the non-gaap financial measures do not replace the presentation of our gaap financial measures and should only be used as a supplement to , not as a substitute for , our financial results presented in accordance with gaap . 31 the non-gaap adjustments , and our basis for excluding them from non-gaap financial measures , are outlined below : amortization of acquired intangible assets – we have incurred amortization of intangible assets , included in our gaap financial statements , related to various acquisitions we have made . the amount of an acquisition 's purchase price allocated to intangible assets and term of its related amortization can vary significantly and are unique to each acquisition ; therefore , we exclude amortization of acquired intangible assets from our non-gaap financial measures to provide investors with a consistent basis for comparing pre- and post-acquisition operating results . stock-based compensation and amortization of capitalized stock-based compensation – although stock-based compensation is an important aspect of the compensation paid to our employees , the grant date fair value varies based on the stock price at the time of grant , varying valuation methodologies , subjective

