US STOCKS-Tech rally, Ukraine deal boost Wall Street
* Ceasefire deal reached between Ukraine, Russia
* Cisco shares rally after results; Tesla falls
* TripAdvisor soars on results; Expedia to buy Orbitz
* Indexes up: Dow 0.5 pct, S&P 0.8 pct, Nasdaq 0.9 pct (Updates to afternoon trading)
By Ryan Vlastelica
NEW YORK, Feb 12 (Reuters) - U.S. stocks advanced broadly on Thursday, with a rally in technology stocks leading the Nasdaq to a 15-year high, helping to offset the impact of some tepid economic data.
Sentiment was also boosted by a ceasefire agreement between Russia and Ukraine, which soothed concerns that tensions in the region would prove a further drag on Europe's economy.
The S&P information technology sector rose 1.4 percent in its third straight daily advance. Cisco Systems climbed 9.4 percent to $29.46 in the network equipment maker's biggest one-day jump since May 2013 after reporting earnings and revenue that beat expectations.
TripAdvisor Inc soared 24 percent to $83.35 a day after posting revenue that topped forecasts. Fellow online travel company Expedia jumped 16 percent to $90.99. Earlier, Expedia agreed to buy Orbitz Worldwide for $1.38 billion in cash. Continuación...