This book is a handy reference manual to have around. With over 400 pages of terms, the information is a surface type of format, only giving the basic amount necessary.
From A to Z there are terms like ANSI, CDR, ELAN, ISDN, MUX, NAM, POTS, SMB, UDP and XID. Also there is a section strictly devoted to Cisco terms from CID, CNSI, EIRGP, FSIP, ISL, SDLC, TRIP and IRGP are but as few of the terms.
There could be a whole lot more added to this book including pictures of some things, a cd rom with an e-version of the book. Overall the value may not be worth the price.