POWER OF ATTORNEY
      The undersigned, as a Section 16 reporting person of Limelight Networks, Inc. (the 
"Company"), hereby makes, constitutes and appoints each of James R. Todd, Philip C. Maynard, Jeffrey W. 
Lunsford, Rita Tocco, and Mark L. Reinstra, the undersigned's true and lawful attorneys-in-fact, 
with full power and authority as hereinafter described on behalf of and in the name, place and 
stead of the undersigned to: 
1.        prepare, execute, acknowledge, deliver and file Forms 3, 4 and 5 (and other forms 
and all amendments thereto) with respect to the undersigned's ownership, 
acquisition or disposition of securities of the Company, with the United States 
Securities and Exchange Commission, any national securities exchanges and the 
Company, as such attorneys-in-fact shall in their discretion determine to be 
required or advisable pursuant to Section 16 of the Securities Exchange Act of 
1934 (as amended) and the rules and regulations promulgated thereunder (the 
"Exchange Act"), or any successor laws and regulations; 
2.        seek or obtain, as the undersigned's representative and on the undersigned's 
behalf, information on transactions in the Company's securities from any third 
party, including brokers, employee benefit plan administrators and trustees, and 
the undersigned hereby authorizes any such person to release any such information 
to the undersigned and approves and ratifies any such release of information; and
3.        perform any and all other acts which in the discretion of such attorney-in-fact are 
necessary or desirable for and on behalf of the undersigned in connection with the 
foregoing.
      
      The undersigned acknowledges that:
      
1.        this Power of Attorney authorizes, but does not require, each such attorney-in-fact 
to act in their discretion on information provided to such attorney-in-fact without 
independent verification of such information;
2.        any documents prepared and/or executed by any such attorney-in-fact on behalf 
of the undersigned pursuant to this Power of Attorney will be in such form and 
will contain such information and disclosure as such attorney-in-fact, in his or her 
discretion, deems necessary or desirable;
3.        neither the Company nor any such attorneys-in-fact assumes (i) any liability for 
the undersigned's responsibility to comply with the requirement of the Exchange 
Act, (ii) any liability of the undersigned for any failure to comply with such 
requirements, or (iii) any obligation or liability of the undersigned for profit 
disgorgement under Section 16(b) of the Exchange Act; and
4.        this Power of Attorney does not relieve the undersigned from responsibility for 
compliance with the undersigned's obligations under the Exchange Act, including 
without limitation the reporting requirements under Section 16 of the Exchange 
Act.
      
      The undersigned hereby ratifies and confirms all that said attorneys-in-fact and agent 
shall have full power and authority to do or cause to be done all and every act and thing 
whatsoever requisite, necessary or appropriate to be done in and about the foregoing matters as 
fully to all intents and purposes as the undersigned might or could do if present, hereby ratifying 
all that each such attorney-in-fact of, for and on behalf of the undersigned, shall lawfully do or 
cause to be done by virtue of this Limited Power of Attorney.  
      
      This Power of Attorney shall remain in full force and effect until the undersigned is no 
longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and 
transactions in securities issued by the Company, unless earlier revoked by the undersigned in a 
signed writing delivered to the Company and the foregoing attorneys-in-fact. 
      
      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be 
executed as of this 27th day of August, 2010.

ACKNOWLEDGMENT        
Document Name: Power of Attorney        
STATE OF CALIFORNIA        )
                        )
COUNTY OF SANTA CLARA        )
        On August 27, 2010, before me, Katrina S. Edwards, Notary Public, personally appeared 
Fredric W. Harman who proved to me on the basis of satisfactory evidence to be the person whose 
name is subscribed to the within instrument and acknowledged to me that he executed the same in 
his authorized capacity and that by his signature on the instrument the person, or the entity 
upon behalf of which the person acted, executed the instrument.
        I certify under PENALTY OF PERJURY under the laws of the State of California that the 
foregoing paragraph is true and correct
        WITNESS my hand and official seal.
 
                                                        /s/ Katrina S. Edwards                        
                                                        Notary Public
                                                        My Commission Expires: February 1, 2013