Ask HN: Recommended Networking primer books?

So I followed CCNA (Cisco Certified Network Associate) at my university a few years ago, but having spend the first few years after graduating purely on programming, I can not help but notice that some knowledge has become a bit rusty. I am having a hard time finding a good primer book to refresh my Networking knowledge, and do not particularly look forward to read the CCNA literature again. Are there any books you guys can recommend from word-of-mouth or your own experience? Thanks heaps in advance!