TCP/IP skills required for security analysts
http://www.securityfocus.com/infocus/1779
Offers advice on how one can seek employment in the security field through education, training, and a strong focus on TCP/IP. Core skills required for a fully competent security analyst are in reality, but a baseline and are considered foundation skills.
Learning an advanced skillset
http://www.securityfocus.com/infocus/1861
A guide to network security analysts towards learning the advanced skillset required to help further their careers. Looks at two key pillars of knowledge, protocols and programming, and why they're so both so important in the security field.
-- Tom