Posts from ‘Operation of Networks’

Jan
31

Today’s CCENT-level challenge involves the methods that are commonly used to describe and compare modern network infrastructures regarding such things as performance and structure.

ICND1-1: What common descriptive  characteristic for a modern network often encompasses a measure of the probability of a network failure called the Mean Time Between Failures or MTBF?

Answer: _________________

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Jan
08

One of the most important technical protocols on the planet is Open Shortest Path First (OSPF). This highly tunable and very scalable Interior Gateway Protocol (IGP) was designed as the replacement technology for the very problematic Routing Information Protocol (RIP). As such, it has become the IGP chosen by many corporate enterprises.

OSPF’s design, operation, implementation and maintenance can be extremely complex. The 3-Day INE bootcamp dedicated to this protocol will be the most in-depth coverage in the history of INE videos.

This course will be developed by Brian McGahan, and Petr Lapukhov. It will be delivered online in a Self-Paced format. The course will be available for purchase soon for $295.

Here is a preliminary outline:

Day 1 OSPF Operations

●      Dijkstra Algorithm

●      Neighbors and Adjacencies

○   OSPF Packet Formats

○   OSPF Authentication

○   Link-State information Flooding

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Mar
01

A key to the mastery of a CCENT-level of networking knowledge is to intimately understand the use of Layer 2 and Layer 3 addressing when two hosts communicate on the network.

This blog post will detail how these addresses are used during the network communications between two host devices (Personal Computers, PCs). Here is the topology that will be used in this example:
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Nov
18

I saw a CCENT student ask a pretty common question on a Cisco forum the other day…they wanted to know tips for making all the theory really “stick” when studying.

A great tip in this regard is to practice as much as possible as you study. Get your hands on your home network and investigate as much as possible to drive the theory home.

For example, in the Operation of Data Networks portion of the course, why not download the free protocol analyzer, Wireshark, and start examining the packets that are generated by common network events?

Here is a simulation that I pulled from our course to demonstrate just how valuable this can be. Enjoy:

wireshark

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