It's a massive fund and so usually provides a steady growth over a medium/long term. Terry Smith who runs it, isnt one for reacting to the market. He chooses good companies and holds for the long term. It's worked so far but a heavy tech sell off would have an impact on it.
Yep a tech sell off would affect everyone but Fundsmith maybe a bit less than some funds that have enjoyed recent growth. His annual letter points out that it is about 28% invested in Tech but this includes companies like VIsa , Pay Pal as well as Microsoft and Facebook.A heavy tech sell off would have a huge impact on lots of funds with Apple and Microsoft alone making up 40% of the value of the Dow, and tech stocks making up a similar proportion of the S&P500, with the biggest 7 companies all being tech stocks and making up 30% by themselves.
It has a lot of consumer staples and Health in it as well.
It's had a great run over the last ten years or so when growth investing has been particularly profitable and maybe it will pull back a bit but it's a pretty solid fund where you are unlikely to lose your shirt.