From the reviews of the first edition: The book presents a wide range of problems concerning operation of the IS-IS routing protocol based on ISO-OSI standards, and belonging to the class of dynamic Interior Gateway and link-state routing protocols. ! the material presented in the book is well organized. ! the book can be undoubtedly very useful for all networking specialists. (Jozef Wozniak, Zentralblatt MATH, Vol. 1070, 2005)