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Cable Internet
Cable internet is a common high-speed broadband internet connection for home use. Questions about this type of connection and the technologies involved belong here.
1,581 Questions
What are the advantages of digital data compared to analog data?
Digital data requires less bandwidth than analog data (e.g. new digital television broadcast compared to old analog broadcast), so more data can fit in the same frequency (e.g. DSL compared to analog modems). This is the primary advantage, although it is also generally stated that data is easier to recover and more tolerant towards interference.
Why is nand gate prefer over nor gate?
The nand gate is prefered over the nor gate because for a nand gate, all other states are true except the 1 1 state which is false while for a nor gate all other states are false except the 0 0 state which is true.
Truth table for 3 input xnor gate?
A, B and C are inputs, Q is output.
A B C Q
0 0 0 1
0 0 1 0
0 1 0 0
0 1 1 1
1 0 0 0
1 0 1 1
1 1 0 1
1 1 1 0
*update*
Although the Logism software shows the 3 input XNOR gate output 1 when all 3 are 1, perhaps there is a mistake, and 3 input of 1,1,1 in an XNOR gate
outputs 0. There is a good reason why. In an XOR gate, an even amount of 1 or 0 input will output a 0, and an odd input of 1 (ie: 1, 1, 1) will output a 1. The truth table
for an XOR gate with 1, 1, 1 input is an output of 1. An XNOR gate will output the opposite of an XOR gate, thus XNOR input of
1, 1, 1 should output 0.
How can Analog signal be digitized?
There are chips that will convert a analog to a digital form. It works on the principle of comparing the input to a reference voltage and outputting the bits [digital] as a value compared to the reference voltage. it can be 4,8,12, of digital data for a 12bits the LSB is 2.4mv.
The OR gate can be converted to the NAND function by adding----gate to the input of the OR gate?
Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contents
Using NAND gatesNOTFigure 12.10: Realizing a NOT gate using a NAND gate
OR The following statements are called DeMorgan's Theorems and can be easily verified and extended for more than two variables.
(12.1)(12.2)
(12.3)(12.4)In general: (12.5)Thus :(12.6)
Now it is easy to see that , which can be checked from the truth table easily. The resulting realization of OR gate is shown in 12.11
Figure 12.11: Realization of OR gate by NAND gates
AND gateFigure 12.12: Realization of AND gate by NAND gates
X-OR gate
(12.7)
Clearly, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates.
Figure 12.13: X-OR gate
X-NOR gate
(12.8)
Again, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates, i.e., NAND or NOR gates.
Figure 12.14: X-NOR gate
Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contentsynsingh 2007-07-25
Which port should you connect a router to a lan?
It shouldn't matter which port you use unless it involves a network switch.
Digital data is discrete data that is used in computers to handle all sorts of digital media, including text, graphics and audio. It only exists in two forms - on and off. This is represented with two digits- 1s and 0s - in the binary format. Since digital data is discrete, files saved in this format can be copied perfectly with no degradation.
The Java standard library refers to the set of dynamically loadable libraries that Java applications can call at run time. This is because the Java platform is not dependent on the specific operating system.
How many two input NAND gates are required to implement a four input NAND gates?
- NOR gate = not(A or B) = A nor B
- AND gate = A and B
- AND gate = not(not A or not B)
- AND gate = not(not(A or A) or not(B or B))
- AND gate = (A nor A) nor (B nor B)
Therefore using 2 input NORs to make a 2 input AND you need three NORs. If you wanted something different (e.g. a 5 input AND) the above proof can be modified appropriately to get your answer.
Converts digital signals into analog signals for transmission over phone lines?
Oddly enough, it's called an A to D Converter and has many sources to obtain, including build it yourself plans or online auctions. There is also D to A converters so please be sure you pick the correct converter.
Analog signal vs digital signal?
A: Analogue is a signal DC with varying amplitudes. Digital is a state defined as true or false or machine language '1' '0' Digital must change states to supply information while analogue it has only to change amplitude
What is OR gate in logic gate?
1. NAND gate is used to invert the input A (by connecting A to both inputs).
2. NAND gate used to invert B the same way
3. Now put A' and B' into into a third NAND gate. The output will be (A'B')' which is equivalent to A+B.
Why analog signal convert into digital signal?
Because an analog signal takes up more bandwidth than the new digital format. By cutting off the analog signals and offering digital only, it frees up enough space on the network to offer services to a wider range of people. It also includes enhancements to the providers network. For example, faster internet speeds, more TV channels, and more features.
Why NOR gates are preferred to NAND gates in program logic array systems when implemented as an ic?
electron mobility in nand 3 times more tat of nor gate. This makes nand faster than nor.
Fiber
What is the definition of universal provision?
A universal provision is something that is offered to everyone. For instance, if a service is offered to the entire population it may be called a universal provision of that service.
At least you will need a router even if you have a modem.
If you get the router from your provider, all the configuration may be done automatically.
If not, it may be possible that you have to configure the router by yourself. In this case it needs the credentials in order to get access to the internet. How to configure the router is explained in its user-manuals.
a DSL/cable router
Which type twisted pair cable will you use to connect router to router?
UTP (unshielded twisted pair) Cat5 or Cat6.
How many Categories of UTP cable exist?
Seven different UTP Cable..
Category 3, Category 4, Category 5, Category 5e, Category 6, Category 6e, & Category 7...
