Source: CompTIA IT Roadmap

Beginner/Novice

CompTIA A+
Microsoft MTA IT (Microsoft Technology Associate – IT Infrastructure Track)

Intermediate

CompTIA Network+
CompTIA Linux+
CompTIA SMSP (Social Media Security Professionals)
CompTIA Server+
CompTIA Storage+
CompTIA Cloud+
CompTIA Mobility+
Red Hat RHCSA (Red Hat Certified System Administrator)
Linux LPIC-1 (Junior Level Linux Professional)
Microsoft MCSA (Microsoft Certified Solutions Associate) : Server 2012

Advanced

Novell CNA (Certified Novell Administrator)
Novell CLP (Novell Certified Linux Professional 11)
Cisco CCNA (Cisco Certified Network Associate)
Cisco CCDA (Cisco Certified Design Associate)
Red Hat RHCE (Red Hat Certified Engineer)
Linux LPIC-2 (Advanced Level Linux Professional)
Citrix CCA (Citrix Certified Administrator)
Microsoft MCSE (Microsoft Certified Solutions Expert): Server Info

Specialty

Novel CNE (Certified Novell Engineer)
Novell CLE (Novell Certified Linux Engineer 10)
Cisco CCDP (Cisco Certified Design Professional)
Cisco CCNP (Cisco Certified Network Professional)
Red Hat RHCA (Red Hat Certified Architect)
Citrix CCEA (Citrix Certified Enterprise Engineer)

Expert

Novell MCNE (Master Certified Novell Engineer)
Cisco CCIE (Cisco Certified Internetwork Expert)
LPIC-3 (Senior Level Linux Professional)