In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: A local area network ( LAN ) is a computer network in a small area like a home , office , or school .
A: 
A local area network ( LAN ) is a computer network that interconnects computers within a limited area such as a residence , school , laboratory , university campus or office building .