Archive for December, 2008

Certifications: A new barrier to entry?

December 4th, 2008 by Ivan Pepelnjak


Recent blog posts indicate that, in at least some market segments, IT certifications are becoming a new barrier to entry: companies require a specific set of certifications in their job offerings and use those requirements to filter the candidates who are invited to the initial interview. Obviously, IT vendors pushing ...

Large hard drives in RAID 5 a problem?

December 2nd, 2008 by Vladimir Stajic


A colleague recently brought to my attention Robin Harris' blog post »Why RAID 5 stops working in 2009.« According to the blog, we're supposed to be nearing the limit of usefulness of RAID 5. Harris' thesis states that hard drive manufacturers currently specify that up to 100,000,000,000,000 bits can be ...

Designing Site-to-Site IPsec VPNs – Part 3

December 1st, 2008 by Marjan Bradesko


Site-to-site VPNs using IPsec can be implemented with the crypto maps or, when routed interface is needed, by GRE-tunnels. Virtual Tunnel Interfaces (VTIs) are a relatively late addition to Cisco IOS and eliminates the need for additional GRE overhead, while still providing the logical interface. Boštjan Šuštar, the Internetworking Expert at ...