Resource Library

The purpose of Interior Routing Protocols (IGP), and routing protocols more generally, is to advertise the existence of destination networks. All protocols then have some method of picking what they would consider to be the best path and maintain the information. By...

What is Network Time Protocol (NTP)? Well, it’s a network protocol used to synchronize clocks between computing systems over a packet switched network. It’s been around since the mid-1980s and was developed by David Mills at the University of Delaware; it is one of the oldest protocols still around on the Internet. NTP replaced other time synchronization technologies that didn’t have some capabilities to adjust time based on location of the time source or time server relative to the receiver or adjusting to the variation of delay found on typical data networks.

Precision Time Protocol (PTP) is a protocol designed to go beyond what Network Time Protocol (NTP) can offer relative to accuracy. PTP is IEEE standard 1588 that can give local computing systems accuracy within the sub-microsecond range (such as microsecond, nanosecond or picoseconds) whereas NTP is within milliseconds or longer. PTP standard was first released in 2002 and known as 1588-2002. In 2008, the IEEE released a revised standard for PTP, known as 1588-2008, that improved the accuracy and precision of the protocol. It is also known as PTPv2 and is not backward compatible with the older version. PTP was developed for packet based network for control and measurement systems.

One size does not always fit all. At times there’s a need to run more than one routing protocol and have more than one routing domain: multivendor shops, migration from one protocol to another, scalability issues of a single protocol, political or personal preference, production versus test networks, mergers, and acquisitions.

Routers and switches make up the bulk of the network infrastructure and are vulnerable to attack. In a previous article, I talked about some of the different ways of hardening your network devices. In this blog, I’d like to specifically examine the routing protocols used on the major Cisco network operating systems.

Dynamic Multipoint Virtual Private Network (DMVPN) is a Cisco network solution for those with many sites that need access to either a hub site or to each other.

Understand the two training options to prepare for the CCNA Routing and Switching certification - traditional and accelerated. Global Knowledge allows you to learn at your pace. The traditional training path features two courses, ICND1 and ICND2, and ten days of training. The accelerated training path combines the content found in ICND1 and ICND2 into a single 5 day course, the CCNAX Routing and Switching Boot Camp. Learn which option is best for you.

Understand the Cisco Collaboration technology and certification training portfolio. This overview will cover the courses needed to prepare for the CCNA Collaboration and CCNP Collaboration certifications. You will also learn about recommended skills-focused courses covering basic and advanced Unified Communications Manager administration.

Understand the Cisco Security technology and certification training portfolio. This overview will cover the courses needed to prepare for the CCNA Security and CCNP Security certifications. You will also learn about recommended skills-focused courses covering SourceFire technologies, the ASA security solution, and the ISE access control and authentication platform.

What were the top paying IT and project management certifications for 2016? his article will help you answer both questions by providing a review of the 15 top-paying certifications.