ICND1 Networking Summarization

The studying for my ICND1 has been doing rather well, due to some minor set backs from the last week I should be done all my ICND1 videos for my CCNET certification. This blog entry will summarize all 14 videos I have viewed. In the course that I have skipped any critical information I will be using my notes and this entry as a reference when re-viewing the videos before the exam.

Brace yourself here is what I've got out of 14 videos:


The common question that anyone should ask a network engineer is WHAT IS A NETWORK?

Now before reading on please ask yourself the question and consider.

Okay since you have the answer I will share what I have come up with:

Through civilization we have always strive to come together, build as one, and most of the trying actually got done. Sometimes what got done was by force by now is usually compensated with mula the bucks. As I vision it like we use cement to build roads and highways, we use wire(copper. coaxial, (air)frequencies) to build roads for information sharing. When we share information before computing we used the post office, and Networking is similar as sending a letter in the mail, the envelope(packet) gets tossed(transmitted) in a bin(NIC card) then carried to the post office(wire) where it's sorted out (digital device like a router) and sent to the right destination, and sometimes it must hit multiple destinations before it arrives.

So for a more simple answer a Network is the fabric that ties, through multiple digital devices, information to reach its destination.

Some key attributes in networking:

Switch - Central meeting place for all packets, has separate collision domains

Router - Relays information to the WAN (Internet)

Internet - Multiple routers connected together

WAN - fast link ---AT&T


In order to use a network efficiently companies and people have needs in order for them to co-operate and operated effectively in today's modern fast changing world. The dire commonality is the communication between services within high end servers. Like human's computers now have a set a tools that have a commonality with standards which are called ports.

Some well known PORT numbers:
TCP UDP
21 -FTP
22 -SSH
23 -Telnet -69 TFTP
25 -SMTP
53 -DNS -53
80 -HTTP
110 - POP3
443 -HTTPS

Each port has its funcation which should be already be known at this stage of the game by the reader, due to the practice of hard school work.

In order to test things are working properly and things are 'alive' as I like to call it, a ping request is sent to the ports, alive will signal back !!!!!!!.



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Yes it has to end now I seem to have gone into a mind flux which needs a bit of entertainment.

Stay tuned to next post it will be more dynamic and lengthier.