EXHIBIT A
AGREEMENT OF JOINT FILING
In accordance with Rule 13d-1(k) under the Securities and Exchange Act
of 1934, as amended, the undersigned hereby agree to the joint filing on behalf
of each of them of a Statement on Schedule 13G, and any amendments thereto, with
respect to the Common Stock, par value $0.001 per share, of Concentric Network
Corporation and that this agreement be included as an Exhibit to such filing.
This Agreement may be executed in any number of counterparts, each of
which shall be deemed to be an original and all of which together shall be
deemed to constitute one and the same agreement.
IN WITNESS WHEREOF, each of the undersigned hereby executes this
Agreement as of February 14, 2000.
SOFTBANK VENTURES, INC.
By: Yoshitaka Kitao, President & CEO
By: /s/ Xxxxxxx X. Xxxxx
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Xxxxxxx X. Xxxxx, Attorney-in-Fact
SOFTBANK CORP.
By: /s/ Xxxxxxx X. Xxxxx
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Xxxxxxx X. Xxxxx, Attorney-in-fact
XXXXXXXXX XXX
By: /s/ Xxxxxxx X. Xxxxx
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Xxxxxxx X. Xxxxx, Attorney-in-fact
