She doesn't play it exactly like Jimmy, but I like what she's done with it. I adopted a blend of the two when I learned it years ago..here's a link to video of myself playing it on mandolin, along with my brother and sister-in-law on guitars:    • Battle of Evermore cover, from Led Ze...  
NOTE to anybody about to leave a comment that JPJ played the mandolin in Zeppelin: Jimmy Page played mandolin on this song (JPJ played acoustic guitar). He wrote the music for it after picking up and messing around on Jonesy's mandolin one day.
Nancy clip taken from her 1996 instructional video. Link to purchase DVD here: https://www.wwbw.com/Hal-Leonard-Nanc...