do I go with 'routing tcp/ip volume I/II - Doyle' or do I go with 'CCIE Routing and Switching Exam Certification Guide, 3rd Edition - Odom'
they both seem to be relevant, however Odom has a more recent publication. Also, I am concerned that 'routing tcp/ip volume II - Doyle' was published in 2001. could this be outdated? Also, I noticed that Odom covers some switching. I appreciate any assistance on this