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Anyone who’s managed switches over the years knows that the Spanning-tree protocol (STP) is both the best and worst thing to ever happen to the data center at layer 2 of the OSI model. On the plus side, the Spanning-tree protocol is what first allowed us to create redundant paths within our switching infrastructure, making our data center much more resilient to outages than ever before. Anyone who’s experienced a “broadcast storm” knows the full value of Spanning-tree in the traditional switching environment. We’ve also seen many improvements in Spanning-tree over the years to make it work faster and more efficiently (i.e. Rapid Spanning-tree, Bridge Assurance, and many others).
Cisco IP phones support a variety of different audio codecs. In this post, I will explain some of the differences and explain which versions of CUCM and the Cisco IP phones support the various audio codecs. Audio codecs are responsible for sampling human speech (a s...
In support of software-defined networking, Cisco has introduced several products to strengthen networks and meet the increased demand for flexible and cost-efficient solutions. The Cisco SDN solution in the data center is ACI. Outside the data center the primary Cisco solution is DNA.
Cisco Learning Credits (CLCs) are prepaid training vouchers that make planning for your success easier when purchasing Cisco products and services.
The Cisco Certified Network Professional Enterprise is built on the longstanding and well-recognized CCNP Routing and Switching. With the addition of evolving technologies, this makes the certification current and relevant. Having a vendor certification can be hit or miss, depending on the vendor, but with Cisco holding a major percentages of market share in the different technologies and implementations in the networking industry, having a CCNP Enterprise on your resume offers several advantages.
The new Solution Specializations are designed to more closely align to the offers and solutions delivered by partners to their customers.
This certification profile covers the job functions and titles held by the professionals who hold the certification, views on job security and satisfaction, CISSP salary information, along with other certifications held and tenure. The data is from Global Knowledge’s annual global IT Skills and Salary Report so you won't find it anywhere else.
The value of IT certifications has grown considerably over the last decade. Examine the evolution of certification trends, see the top-paying certifications and learn how decision-makers are struggling to hire certified employees.
This week we'll review the IPv4 Address Classes including subnet masks, examples of Class C, Class B, and Class A subnet masks, and planning IPv4 addresses.