Computer networks allow people to easily share information. Organizations and entire cities rely on computer networks. Hackers can break into networks to disrupt systems or steal data. Hacking and other cybercrimes are on the rise. This book explores common cybercrimes and how people can guard against these threats. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.