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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
Any logical function can be implemented with only NOR gates?
Yes.
_____
A----|_____NOR------Q
This is an inverter. A NOR gate is an OR gate with an inverter on the end, so adding the above configuration after another NOR gate would give you an OR gate.
__
A----|__NOR---\
__ NOR------Q
B----|__NOR---/
This is an AND gate. By adding the inverter, you can get a NAND gate.
A____
|__
_|__NOR----------------\
| | \
| |___ NOR----Q
B __| |___NOR-----\ /
|_____ NOR --/
|_____NOR-----/
By combining an AND gate, an OR gate, and a NAND gate, and canceling out a couple of inverters, you get this operator, which is a XOR gate.
The formatting here is messed up, but if you go to the "improve answer" link, you can see the circuits.
How long does it takes a 1000 mbps movie to download at 7 mbps?
Your question doesn't make any sense. "1000mbps" refers to a bitrate, rather than a size. Also, there are no movies encoded at 1000mbps. That would be 125 MB for every second of audio and video. 1080p HD video is encoded between 18 and 32 mbps, for comparison.
If you meant a "1000 MB" movie, on a 7mbps internet connection, that can be answered.
7 mbps / 8 = 0.875 MB/sec.
1000 MB / 0.875 MB/sec = ~1143 seconds
1143 s / 60 s/min = ~19 minutes.
That's if you downloaded at your maximum bandwidth the entire time, which you probably wouldn't. If you normally get 300 or 400 KB/sec, then closer to 40 or 50 minutes.
How does Mobile Network works?
Without base stations mobile phones will not work and we cannot connect our customers' calls. Base stations are often called masts or antennas, as these are the most visible parts.
Mobile phones use radio frequency (RF) fields to send and receive calls, texts, emails, pictures, web, TV and downloads. An RF signal is sent to the nearest base station, which sends the signal to a digital telephone exchange and on to the main telephone network. This connects the signal to the receiving phone, again via a base station (if it is another mobile phone).
Mobile phones connect to the base station providing the best signal - usually the nearest. As a person moves away from the base station the signal becomes weaker, so the mobile phone automatically adjusts its own RF field strength to maintain the minimum level needed to communicate with the base station.
The area covered by a base station is known as a cell.
Each cell is usually split into three sectors, which overlap with the sectors of neighbouring cells to create an uninterrupted network. When people travel, the signal is passed from one base station to the next, and typically never has to travel further than the nearest base station.
The size and shape of each cell is determined by the features of the surrounding area, such as buildings, trees and hills, which can block signals. Cells are largest in flat open landscapes, where they can cover up to a five kilometre radius. Cells in urban areas cover up to a two kilometre radius. The smallest cells are in built up areas, where micro-cell base stations are used to provide extra coverage and capacity.
Each base station can only handle a limited number of calls at a time. In areas of high demand, additional antennas are sometimes added to a base station to send and receive more calls and other mobile services, or an extra base station is installed.
All this means that a large number of base stations are needed to allow more people to use mobile phones, from more locations, and for coverage to be continuous when moving around.
It depends where they're being installed. On land, they are usually laid in a trench, and covered over. At sea, they're fed ffrom the back of a ship as it crosses the sea, and just lay on the seabed.
How do you learn Java Programming?
you go to school to learn it or you can read books on your own particuarly at amazon just search java programing or google it
One of the best ways to learn a new programming language is to write programs in it. Try rooting around in the Java Programming category on this site. Look for questions like "Write a program to...?" and see if you can figure out how to answer them.
Sun (now Oracle) has a whole website dedicated to the online versions of print books about learning the various parts and techniques of Java, including a very good introduction to Java programming language.
TDMA (Time Division Multiple Access) separates high speed traffic.
L.E. Waterman of New York designed the firstworkable fountain pen in 1884. Lazlo Biro patented the first ballpoint pen in 1938
a page on a website. the link to this page is http://wiki.answers.com/Q/What_is_a_link_on_a_computer&action=edit
- The output is on only when both/all inputs are on.
- The output is high only when both/all inputs are high.
- The output is true only when both/all inputs are true.
- The output is 1 only when both/all inputs are 1.
- The output is yes only when both/all inputs are yes.
For a two-input AND gate there are four possible input combinations:
- false AND false = false
- false AND true = false
- true AND false = false
- true AND true = true
Consider the following statements:
- It's snowing in Jamaica, and the President is ten meters tall.
- It's snowing in Jamaica, and France borders Spain.
- Earth orbits the sun, and the President is ten meters tall.
- Earth orbits the sun, and France borders Spain.
The first statement is obviously false because both conditions are false. The second and third statements are false because although one condition is true in each statement they're not both true. The fourth statement is true because both conditions are true.
Material sent out of the factory and should return the same within 6 months time.
How do you delete an ad hoc network?
You can delete an ad hoc network from the command prompt window.
Here you type:
netsh wlan delete profile name="[Insert network name]"
How many minimum NOR gates is required to implement NAND gate?
- A 2 input NAND gate requires 4 NOR gates.
- A 3 input NAND gate requires 5 NOR gates.
- A 4 input NAND gate requires 6 NOR gates.
- etc.
What is a managed service model for IT?
The Managed Service model is one of selective outsourcing, where a preferred partner manages certain applications and services driven by the customer's desire to mitigate risk and realise increased reward. This approach has enjoyed something of a renaissance recently, and is being increasingly viewed as a rather sound, pro-active method of fulfilling enterprise requirements, often within demanding timescales. Typically, the services are offered on a fixed-fee basis with a contract driven by a service level agreement to dictate the highest quality of service for the money being spent. An SLA provides an accountable method of delivering and receiving managed services. Examples of services being delivered: Help Desk
Remote Monitoring
Security (Unified Threat Management, VPN, etc.)
Consulting and planning
How many PC on internet through one modem can you use?
Without a router: 1
With a router: 253+....
With the exception that your router(Or network switch) doesn't run out of ports; In which case you just add in another network switch & daisy chain it either via uplink port or any free ethernet port. Make sure that you obtain a network SWITCH & not a network HUB as hubs devide bandwidth for every item you plug into the hub(Affects LAN speed & network latency) & switches always run at the full line speed.
Some routers have multiple LAN ports & some take it even further so that it lets you assign what ports will do what(e.g. WAN, LAN, LAN2, LAN3...) This allows for multiple sub-nets.
So lets say that your external ip is: 0.0.0.0 for visualization purposes....
Your routers main LAN or internal IP is: 192.168.0.1
You can have 253 clients or PC's on the 192.168.0.2-192.168.0.254 address range.
Your routers secondary LAN IP is: 192.168.1.1
You can have 253 clients or PC's on the 192.168.1.2-192.168.1.254 address range.
Your routers tertiary LAN IP is: 192.168.2.1
You can have 253 clients or PC's on the 192.168.2.2-192.168.2.254 address range.
You can theoretically keep going in this fashion to build your own local Intranet(Local version of Internet) But does not require registering with RIPE or any other Regional Internet Registries.
The reason you can't have 192.168.x.1 or 192.168.x.255 is because they are already assigned. 192.168.x.1 is the routers internal IP & it is also used by DHCP & other services within the router. 192.168.x.255 is the rebroadcast IP address per subnet.
In fact I believe this also applies to Internet IP address; You won't ever see 255 or 1 at the end of your external IP.
