Intermediate Level Administration (LPIC-2)
Status: Available now; published November 29, 2001
Pre-Requisites: You must have an active LPIC-1 certification to receive LPIC-2 certification, but the LPIC-1 and LPIC-2 exams may be taken in any order.
Requirements: Passing Exams 201 and 202
Overview of Tasks: To pass Level 2 someone should be able to
Administer a small to medium-sized site
Plan, implement, maintain, keep consistent, secure, and troubleshoot a small mixed (MS, Linux) network, including a:
LAN server (samba)
Internet Gateway (firewall, proxy, mail, news)
Internet Server (webserver, FTP server)
Supervise assistants
Advise management on automation and purchases  read more

Linux skills certification:
LPI believes in the need for a standardized, multi-national, and respected program to certify levels of individual expertise in Linux. This program must be able to satisfy the requirements of Linux professionals, as well as organizations which would employ or contract them. Our goal is to design and deliver such a program from within the Linux community, using both volunteer and hired resources as necessary. We resolve to undertake a well-considered, open, disciplined development process, leading directly to the establishment of a recognized and widely-endorsed Linux certification body. more information

Why Does Linux Need Certification?
This subject was dealt in detail by Dan York, LPI Co-founder and its first president, in the first article  of a series on Linux certification that he wrote for Linux Gazette. For brevity's sake here's a list of his bullet points (but please consult his article for a more thorough discussion):

Exams Included in Package for LPIC Level 2 certification