found: Lammle, Todd. CompTIA Network+ study guide. Exam N10-008 [ER], 2022:title frame (Todd Lammle) about the author frame (Todd Lammle is the authority on CompTIA and Cisco certifications and is certified in most CompTIA and Cisco certification categories ; he is an author, speaker, trainer, and consultant ; he has three decades of working with LANs, WANs, and large enterprise licensed and unlicensed wireless networks ; lately he's been concentration on implementing large Cisco Security networks using Snort, Firepower /FTD, ISE, and Stealthwatch ; he is an experienced networking engineer who has worked at such companies as Xerox, Hughes Aircraft, Texaco, AAA, Cisco, Toshiba and others ; he has published over 100 books, including CCNA: Cisco Certified Network Associate study guide, CompTIA Network+ study guide, CCNA wireless study guide, CCNA Data Center study guide, SSFIPS (Firepower), and CCNP Security, all from Sybex ; he runs an international consulting and training company based in Colorado, whe he spends his free time in the mountains with his golden retrievers)