Network Security, Firewalls, & VPNs by J. Stewart, D. Kinsey – 3rd Ed. Paperback

Third Edition in softcover trade paperback. 481 pages. Published in 2020 by Jones & Bartlett Learning. Size is approx 9″ x 7 1/2″. Introduces the basics of network security―exploring the details of firewall security and how VPNs operate.