Hartpence Bruce. Packet Guide to Routing and Switching

O’Reilly Media, Inc., 2011. — 180 p.As this book contains both ground-up explanations and advanced ideas, it is appropriate for those just beginning as well as the pros out there, who might need a refresher.
Whether you are working with small networks or interconnecting larger ones, the principles contained remain true.
This book is meant to be a companion to The Packet Guide to Core Network Protocols.
Both books stand on their own, but this book assumes that you understand the concepts and protocols explained previously, including ARP, ICMP, IP, equipment, Ethernet, and masking. Occasionally I’ll throw in a little review, but these sections will be few and far between.