Summit Investors I Form 4A10 Networks / PARTNERS L P SUMMIT ownership change

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Robin W. Devereux his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities (until revoked in writing) to sign any and all instruments, certificates and documents required to be executed on behalf of himself or herself individually or on behalf of each of any affiliate of Summit Partners, L.P. that is not a portfolio company, including without limitation those entities listed on the attached Exhibit A, on matters relating to:

(a)   Sections 13 and 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Rule 144 promulgated under the Securities Act of 1933, as amended (the “33 Act”) and any and all regulations promulgated thereunder,  including filings with the Securities and Exchange Commission pursuant thereto;

(b)   any written ballot or proxy with respect to any investment securities owned beneficially or of record by any such entities;

(c)   such filings required pursuant to the Internal Revenue Code of 1986, as amended, and any related regulations, pertaining to such entities

(d)   economic exhibits relating to such entities; and

(e)   the PATRIOT Act.

and to file the same, with all exhibits thereto, and any other documents in connection therewith, with, as applicable, (i) the Securities and Exchange Commission, and with any other entity when and if such is mandated by the Exchange Act or by the By-laws of the National Association of Securities Dealers, and/or (ii) the Internal Revenue Service, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary fully to all intents and purposes as he or she might or could do in person thereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Said attorney-in-fact is entitled to amend Exhibit A from time to time to reflect additional affiliates of Summit Partners, L.P. that are not portfolio companies.

The undersigned hereby acknowledges that this Power of Attorney supercedes, revokes and terminates any power of attorney executed by the undersigned prior to the date hereof for the purposes listed above.

[Exhibit A and Signature Pages Follow]

Power of Attorney

Exhibit A

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 27 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 27 day of August, 2008, before me personally came Gregory M. Avis, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 24 day of October, 2013.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 24 day of October 2013, before me personally came Darren M. Black, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September 2008, before me personally came John R. Carroll, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 18 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 18 day of August, 2008, before me personally came Peter Y. Chung, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 5 day of September, 2008.

Kingdom of England                                      )

)      ss:

City of London                                                )

On this 5 day of September, 2008, before me personally came Scott C. Collins, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September, 2008, before me personally came Christopher J. Dean, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 12 day of September, 2011.

Commonwealth of Massachusetts              )

)      ss:

Country of Suffolk                                         )

On this 12 day of September, 2011, before me personally came Mark A. deLaar, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September, 2008, before me personally came Bruce R. Evans, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 18 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 18 day of August, 2008, before me personally came Charles J. Fitzgerald, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 21 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 21 day of August, 2008, before me personally came Craig D. Frances, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7 day of September, 2011.

Commonwealth of California                      )

)      ss:

Country of San Mateo                                   )

On this 7 day of September, 2011, before me personally came Greg S. Goldfarb, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September 2008, before me personally came Thomas H. Jennings, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 18 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 18 day of August, 2008, before me personally came Walter G. Kortschak, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September, 2008, before me personally came Martin J. Mannion, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 12 day of August, 2008.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this 12 day of August, 2008, before me personally came Harrison B. Miller, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September, 2008, before me personally came Kevin P. Mohan, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10 day of September, 2015.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 10 day of September, 2015, before me personally came Jay D. Pauley, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 15 day of September, 2008, before me personally came Thomas S. Roberts, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 21 day of May, 2012.

Kingdom of England                                      )

)      ss:

City of London                                                )

On this 23 day of May, 2012, before me personally came Johannes Kornelis Jan. Sikkens, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10 day of September, 2008.

State of Florida                                                )

)      ss:

County of Monroe                                          )

On this 10 day of September, 2008, before me personally came E. Roe Stamps, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 21 day of May, 2012.

Kingdom of England                                      )

)      ss:

City of London                                                )

On this 23 day of May, 2012, before me personally came Christian Raymond Strain, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7 day of September, 2011.

Commonwealth of Massachusetts              )

)      ss:

Country of Suffolk                                         )

On this 7 day of September, 2011, before me personally came Alexander D. Whittemore, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 15 day of September, 2008.

Commonwealth of Massachusetts              )

)      ss:

Country of Suffolk                                         )

On this 15 day of September, 2008, before me personally came Stephen G. Woodsum, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 19 day of May 2016.

Kingdom of England                                      )

)      ss:

City of London                                                )

On this 19th day of May 2016, before me personally came Matthias G. Allgaier, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 19th  day of  January   , 2016.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this  19   day of  January      , 2016, before me personally came Peter L. Rottier, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 2nd day of March, 2017.

Commonwealth of Massachusetts              )

)      ss:

County of Suffolk                                           )

On this 2nd day of March, 2017, before me personally came Michael A. Medici, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.

[Notary Seal]

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the _19th_ day of _January_, 2016.

State of California                                          )

)      ss:

County of San Mateo                                    )

On this  20th   day of   January  , 2016, before me personally came Andrew J. Collins, known to me to be the person described and who executed the foregoing instrument that he acknowledged and executed the same.