Cisco is NETWORKING based company. You MUST have at least the minimum knowledge, and taste of network with you. You can also get CCNA,and CCNP degrees from Cisco..
In the following post. I do my best to transfer to main important concepts
Part 1: Introduction to networking:
Modems : This is the very first device between your equipment that connect your computers to the internet cloud.[DSL or Digital Subscriber Line(12Mbps is the Maximum of this technology, Asynchronous and download is faster than upload, and speed is always fix), T1, T2,T3, cable, fiber optic,comcast modems]
Routers: behind the modem, there is device called router, and it responsible for routing data in the network
Firewalls: underneath the router, firewall exists to protect your device from hackers
Switches: is located under firewall as the spliter of internet signal : HUBs was old concept of Switches. JUST trow them in garbage. Hub has no intelligent and basically split internet between users and it causes problem, but Switches knows how to transfer data. Switches may have different ports from 4 to hundred, thousands. We have managed and un-managed switch. Manage version allows you to go into the switch and program to do certain things like quality of the service.. 10Mbps[old days]/100Mbps[nowadays]/ 1000Mbps [latest technology]
Wireless Access Points: will allow wireless devices, and computers to connect to your network. standards are 802.11 family [a[old and nobody use them nowadays, and is not compatible with other standard], b[11Mbps],g,n[allows much larger area to cover, faster, suitable for VOIP],ac]
Defines Logical and Physical: [Not necessary the same concepts]. For example physically you may have one device including modem+ router + firewall + Switch but logically they for devices. Even you may connect your computer to a switch share with other computer but you not logically connected to the same network
Speed :first of all b=bit and B=Byte and the you should know that speed is measured in bps means bit per second
VPN: Virtual Private Network.: Somebody out of physical network becomes a member of your internal network
Cabling : jack-patch panel
Clients, Devices and Servers: Everything on the network is called network device, Server:is a network device that provide something for the rest of the network, Clients: is a network device that receives ar service from service
Part 2: Understanding broadband technologies
I learnt Python from Google Developer Python class, and I recommend you to start learning it as a fast scripting language.
This topic is also known as timing analysis.
There three type of testing approaches in digital designs:
1-We design, without considering a part for test inside the design, and after it we apply a test pattern to cover a large portion of the faults
2- Design for testablility. such as BIST (Built-In-Self-Test) normally come up with design i FPGA boards
3- Fault tolerant design: In this type of design, we consider a good margin to tolerate errors
1- In design process: It can happen in two parts; specifications and implementation
3-Manufacturing process: It happens in material
1- Dynamic: is more related to timing
2- Static: is more related to wiring faults, two wire close to each other and etc.
Test Models: (very simple fault model: Stuck-at faults)
1 – Stuck-at-0 (s-a-0)
2 – Stuck-at-1 (s-a-1)
Combinational Circuits- Test pattern generation
We have Fault vectors (F), and test vectors (T)
Fault Simulation: Given a test vector, by simulating the circuit with the fault, identify all the faults covered by the test vector, It the output is different this test vector can detect that fault
Test Generation: Given a fault, identify all the test vectors which can cover that fault.
Limitations: 1-We expect one fault to occur[max] 2- Fault other than Stuck-at-fault are expected to show up as stuck-at-faults at some other location 3- these approaches are valid only for combinational circuits
Typical Circuit Enhancement:
1- Insertion of test points: We increase number of outputs
2-Pin amplification: We multiplex the function of the pin
4- Scan chains: We can test all pins from a pin
Will be continued ….
You can ignore this post as, I have never asked, or heard from my gangs who got interview at Cisco hardware team, that any questions related to MATLAB were asked there.
I personally had a tutoring sessions with my students at McGIll, and I decided to review MATLAB here for you, as you are an engineer and having knowledge of MATLAB is a MUST for you.
1-At the end of each command line putting ; will not echo the input
2- Arithmetic: + – * / \(left and right divisions, note that MATLAB has two operation for division) ^ :
Then 6/3 is 2 and 3\6 is 2, too.
3- Last line editing: by pressing Up/Down buttons; you can recall the last line
4- A few built-in functions: sin(x), cos(x), tan(x), sqrt(x), exp(x), log(x), log10(x), acos(x), asin(x), atan(x), atan2(x,y)
5- Naming constants and variables: MATLAB is Case-sensitive. Therefore, Pi, Pi, PI; pi are different
7- Format: 5 digits display is default, but 15 digits display can be achieved by command: format long, for scientific nation command is format short e.
8- Cleaning the screen: clc
1-Define a row and column matrix: space and comma are equal [1 2 3] = [1,2,3]
2-Indexing for a matrix(x,y)
3- Size of a matrix: size(Matrix), Length of vector: length(Matrix)
4- Clearing variables: clear
5- Add/subtract to matrix A+B. A-B, array multiplication A.*B, array division A./B. Array power A.^n
6- Defining equally distance elements, A=[1:1:10];
7-Simple plots: plot(x,y,’color’), grid on/off, xlabel(‘’), ylabel(‘’), figure, hold on/off, hist(Y,X)
1- Defining a matrix: A=[1 2 3;4 5 6]
2- Juxtaposition and sub matrix C= [A B], C=[A;B], C=A(:,1), A(:,1), A(1:2,1:2’]
3- Elementary operations with matrices A+B, A-B, A.*B and A*B, A./B
1-imaginary unit is i or j but j is preferred professionally, since, ‘i’ is as current unit in electrical engineering , note that there is no need to write * before i,j
2- real part: real(Z), imaginary part: imag(Z), magnitude abs(Z), angle by angle(Z)
3- Arrays of complex numbers
System of linear equations: AX=B
1- Determinant: det(A)
2- Crammer’s rule: X=[det(D1);det(D2);det(D3)]/det(A), D1=A, D1(:,1)=B, D2=A, D2(:,2)=B, …..
3- Matrix inversion inv(A)
4-Solving systems of linear equations in MATLAB
1-Polynomial representation: by its coefficients
2- Getting roots: roots(coeff)
3- Multiplication is achieved by convolving conv(c1,c2)
4-Division is achieved by deconvolving deconv(c1,c2)
Programming in MATLAB
1- Programming a function: function y=Alan(x1, x2)
2- Repetitive control structure- FOR LOOPS: e.g.
3- Conditional control structure:
Else if condition
4- Repetitive control structure- WHILE LOOP
External files and programs:
1-Saving data: save filename.mat variable / save(filename, variables)
2- Loading data X=load(filename.)
Differential and integral
1- Calculating differential: diff(x)/interval : consider that length of diff(x) is less that length of x
2- Calculating Integral: sum(x)*interval
post no 12
I found this video channel for you. unfortunately, it has no voice.
Introduction to MATLAB by D.F. Griffiths
I am uploading a series of videos on my YouTube channel , but it’s matter of time. Please subscribe. and get the latest updates
Meanwhile, I introduce the following:
- Testbench.in : System Verilog and VMM tutorial with a lots of example
- Asicguru.com : Another nice SV tutorial site
- Doulos SV Tutorial : Not that much extensive, but still good
- Another decent tutorial from Project-Veripage
- SV Tutorial from ASIC-World. It is not yet complete, but once it is complete, then it will be another great site to learn SV.