Cisco

(CSCO) - Get Report

perked up the tech sector with a strong second-quarter earnings report. The networking giant posted pro forma earnings of 25 cents a share, a penny ahead of the 34-analyst estimate and up from the year-ago 17 cents. The company also set a 2-for-1 stock split. Cisco cited strength in its end-to-end Internet solutions for each of its key markets.

For more details on Cisco's

earnings, see a separate story from the

TheStreet.com/NYTimes.com

joint newsroom.

eBay

(EBAY) - Get Report

said a hacker attack had shut down its site. The attack marked the third "denial of service" attack on a major Web site in just two days. Earlier,

Buy.com

(BUYX)

, whose shares were enjoying a trading debut today, said a similar type of attack crippled its site for about three hours and

Yahoo!'s

(YHOO)

site problems yesterday were also believed to be the result of similar hacker activity.

In other postclose news (

earnings estimates from First Call/Thomson Financial; earnings reported on a diluted basis unless otherwise specified

):

Earnings/revenue reports and previews

Allegiance Telecom

(ALGX)

posted a fourth-quarter loss of 93 cents a share, including a charge. The 11-analyst estimate called for an operating loss of 91 cents a share, while the year-ago loss of 79 cents also includes a charge. The company approved a 3-for-2 stock split.

Flir Systems

(FLIR) - Get Report

warned that its net earnings fourth-quarter earnings will fall short of analyst estimates due in part to slower than expected part deliveries. The company said its earnings per share will be 8% to 12% above the year-ago earnings of 53 cents. The four-analyst estimate calls for 87 cents.

Chiron

(CHIR) - Get Report

reported fourth-quarter earnings from continuing operation of 13 cents, excluding items. The 15-analyst estimate called for earnings of 14 cents while the year-ago earnings were 8 cents a share.

U.S. Aggregates

(AGA)

reported fourth-quarter pro forma earnings of 20 cents a share, in line with the five-analyst estimate and up from the year-ago 12 cents a share.

ZD Net

(ZDZ)

reported fourth-quarter earnings of 7 cents, better than the five-analyst expected loss of 1 cent a share. Year-ago pro forma earnings were 1 cent including items.

Mergers, acquisitions and joint ventures

Oneok

(OKE) - Get Report

will buy

Kinder Morgan's

(KMI) - Get Report

natural gas gathering and processing business in Oklahoma, Kansas and West Texas in addition to other businesses. ONEOK will pay Kinder about $114 million plus an amount equal to net working capital at the closing.

Transportation Corp. of America

(TCAM)

and

USFreightways

(USFC)

have terminated their stock-swap merger agreement just three weeks after it was announced. In a brief statement the companies gave no reason for calling off the deal which was unveiled on Jan. 18 , saying only that the decision was by mutual agreement.

Transport also reported fourth-quarter earnings of 15 cents before charges, compared with the year-ago earnings of 38 cents. The three-analyst estimate had called for earnings of 40 cents a share. The company also said it restated its results for its latest third quarter to reflect a reduction in revenue and costs related to a customer service agreement.

Offerings and stock actions

Miscellany

Sola International

(SOL) - Get Report

said CEO and President John Heine plans to step down once a successor is named to the posts. The company said Heine would remain on the board of directors.