Re: [Blind-sysadmins] Want to study Computer networking, need recommendation and suggestions

Sean, That was a awesome explanation, Thank you, Lance -----Original Message----- From: Blind-sysadmins [mailto:blind-sysadmins-bounces@lists.hodgsonfamily.org] On Behalf Of Sean Murphy Sent: Wednesday, 07 September, 2016 12:20 AM To: Blind sysadmins list Subject: Re: [Blind-sysadmins] Want to study Computer networking, need recommendation and suggestions My suggestion is to start doing self education. There is a book called TCP/Ip guide (from memory) that goes into a lot of detail and is free on the net. A a CNNA (basic level admin cert) the diagrams are not that complex. The most important thing to understand is what a router, switch and end-device does with the packet of data. In networking there is two models used to explain how the data stream is broken up. A data stream is the sending of a web page or file. OSI uses 7 layers and TCP/IP uses 4. I have used the OSI model below to explain some concepts, but not in full. Also these models are call the network stack. Layer 7 - application - This is where an application accesses the stack such as your browser. Layer 6 - Is the concern of presentation - How the data is formatted such as HTML, MMIME, etc. Layer 5 - is concern with session - Manages the creation and removal the session between two devices. RPC is one protocol that is associated with this level. layer 4 - Transport - This layer breaks the data stream up into manageable chunks of data called segments. Layer3 - Network - Your router and routing protocols work at this level. The routing protocol is like a postman telling where the traffic should go. Layer 2 - data - link - manages communication between directly connected devices. Such as Ethernet and Wireless. Layer 1 - Physical - This is concern with the bits and bytes being sent across the transmission equipment such as cat5, coax, wireless transmission, fibre, etc. My explanations are summaries and just to give you an idea of the type of information you need to learn at a admin level. There is far more details. If you have access to online book services like Safari Orally or BookShare. Then I would look for CCNA study guides. They will teach you the basics. In relation to lab. There is solutions for virtual environments for to simulate Cisco equipment. Dynamips is one option. The challenge is to get the IOS images that will work in that environment. Other solutions available require a large chunk of memory. Search for this on the net and you will find solutions. The reason why I support a physical lab is you get a feel what a router or switch looks like, you can insert and replace network cards, etc. The virtual environment is heavily used as it is cheaper and most engineers don’t deal with the physical network equipment. There are people who do this for them. This is especially common in large companies. Sean

On 8 Sep 2016, at 1:57 AM, Hadi Rezaei wrote:

Hi guys

Thank you a lot for the helpful info, I really do appreciate this.

So from my understanding, First I need to attend an online or / local school and start learning, then have a network lab to do tests on, and then go for an exam if I wanted to aquire a certificate.

Do you think that It's a good idea that I start doing self studies? or Diagrams and the visual design aspect of the networking will get in my way and I get confused.

I'm very new to this; I have no basic knowledge at all, Do you think that I should even start studying Cisco courses right away?

On 9/6/2016 7:38 PM, Scott Granados wrote:

...

I don’t know about the Cisco side where things are but on the Juniper side you can run VSRX or a virtual instances under something like fusion or workstation so you can have a virtualized environment for your lab. I put the VSRX in to packet mode and they start behaving just like routers so you can have firewalls / routers and even switches in your topology running all virtualized code.

Might be a cheaper way of building your test lab. Cisco used to have emulator software available but I believe there were copyright concerns that may have shelved that effort, not sure the current state there as I am focused on Juniper products more so than Cisco.

The other thing I’ll say is both Cisco and Juniper are very supportive of disabled engineers at least that’s been my experience not the least of which they will hire them. You might contact Cisco directly and they can also offer you pointers to get started. They are very good at making accommodation for testing and that sort of thing and Cisco used to offer me their documentation in braille but I haven’t followed up on that recently, not sure if that’s changed.

Good luck and I personally think you’ve picked an interesting topic to learn. It’s treated me well.;)

...

On Sep 5, 2016, at 7:44 PM, Sean Murphy wrote:

None of the Cisco Academy courses will give you the CCNA. They will prep you for them only. Then you have to take the certification as a different exam. The biggest challenge you will find is developing an environment to test your network concepts in a network lab. You can rent rack services on the net for CCNA. The books will provide you with the theory. The challenge with the books is they are visually designed thus understanding packet flow, net mask maths, etc can be tricky.

Sean

...

On 7 Sep 2016, at 2:43 AM, Hadi Rezaei wrote:

Hi there

Thanks for the links; I just did take a look at them. CAVI appears to be an online school if i'm not mistaking.

Will completing the courses in CAVI give me an oportunity to take the CCNA exam? The concept of an online academy sounds new to me; It's however looks very interesting, I'll do more research on this.

Thanks

On 8/31/2016 9:21 PM, Guerra Access Technology Training LLC wrote:

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Have you looked in to www.ciscovision.org or www.cavitraining.org

-----Original Message----- From: Blind-sysadmins [mailto:blind-sysadmins-bounces@lists.hodgsonfamily.org] On Behalf Of Hadi Rezaei Sent: Thursday, September 01, 2016 9:05 AM To: Blind-sysadmins@lists.hodgsonfamily.org Subject: [Blind-sysadmins] Want to study Computer networking, need recommendation and suggestions

Hi there guys.

I'm Hadi from Iran. I've just graduated this summer from Tehran Azad university and hold a BA degree in English literature. I'm thinking about having a major change and I'm looking in to Computer networks. I've always been intrested in this subject, and have played with my devices in home to create a small network, (e. streaming with raspberry pi, sharing data between devices, and some basic things like that). I'm looking for a way to study networking, and already doing research about courses and certifications. I wanted to ask for advice and recommendations from you guys, and get help from experienced users. I'm currently looking for courses, colleges and universities that can help me to start in this subject, and I would greatly appreciate any help if someone can help me with this. There are some points I would like to make, the first one being is that I'm on a complete beginner level, and I do not have any passed experience with networking, and working with network-related gear. one very important point is that I'm extremely enthusiastic towards this path, and am ready to move abroad and accept all the challenges that comes with it, If It means for me to study in an environment that is suitable for learning this subject with accessible methods and gear. now - I say this because my current options in my current location are extremely limited, As there are absolutely no support for blind and visually impaired to study networking courses in education centers around me; So I would be completely on my own. fortunately, I have the support and funds to move out of the country if required for me to follow this path and career, so I'm strongly considering this option.

this is a very general letter, but I'm willing to provide more information if needed. I'm looking for any tips or advice I could get to start on this journey, and I would appreciate and be very delighted for any of them. Thanks a lot Cheers Hadi Rezaei

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