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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
Link Layer
End-to-end encryption is an encryption technique that ensures all data coming from your computer to the destination is completely encrypted.
Virtual path identifier is used to identify the virtual circuits used to deliver cells in the ATM network.
Why are communication satellites in geosynchronous orbits What is the prime advantage of lEOs?
Regarding the communications satellite orbit; a geosynchronous orbit is one that keeps the satellite in one position in the sky. It is a spot in space about 22,000 miles away that the satellite will orbit the earth once a day, so it is moving the same speed as the earth rotates and appears to never move. If your dish network satellite was not in geosynchrous orbit, you would need a device to turn your dish and there would be periods that the satellite would be over a different part of the world, like the sun and moon. They would slip over the horizon and you wouldn't be able to watch TV for a while.
Crossover is Host-to-Host
Straight through is Host-to-Client
What is an optical digital cable?
It is a fiber optic cable carrying a digital audio signal. The common brand name of the cable is TOSLINK (the TOS being Toshiba who developed it).
The red light that you see is a red LED being pulsed on and off very quickly (usually 44,100 times a second). All digital information is transmitted this way. Digital only has two states: 0 or 1, on or off, hence light or no light.
This is the optical version of the coaxial digital output (an orange RCA jack). The format itself is known as S/PDIF (Sony/Philips Digital Interface Format). In most cases, there is no quality difference between optical and coaxial. The only difference is that light is not a physical connection with a wire. It is rare, but "ground loops" (hum) can occur on any wired system where the components are on different electrical systems. Optical is impervious to this anomaly.
There is also an older standard called ADAT which uses this same cable. The ADAT was an Alesis Digital Audio Tape(deck) which has 8 channels of digital audio and was popular in the late 80's. Although the decks haven't been made in many years, many other audio companies have adapted it as a standard for passing 8 channels of audio at once. This is pro use stuff (like in a recording studio).
Is continuous signals has no amplitudes?
By definition a continuous signal is just that continuous to have no amplitude is to mean it doesn't exists
What port must be open to send documents over FTP?
The default FTP port is 21. But most FTP server software allows you to set which ever port you want.
EPIRBs are very easy to activate.
There are 2 kinds, basically.
A Category 1 EPIRB is mounted on a boat in a special housing. When the unit is submerged in water (like when the boat capsizes or sinks) the EPIRB is released and activated automatically, floating on the water's surface sending GPS and Radio distress signals. You don't have to do anything.
A Category 2 EPIRB is a similar device, but must be manually activated, which consists of grabbing the device off its mount and pushing a button. Very easy.
Both offer giant advantages in your chance or rescue.
They are very pricey - $500 up to over $1,000 for the Category 1 with a digital display.
But, you can also rent them for just a small fraction if you are going on a trip, renting a boat, or just need one for a short time.
In a packet-switched data network, what is used to reassemble the packets in the correct order at the destination device?
Computer networking is parallel communication or serial communication?
The answer is either. Computer networking is a very broad category encompassing an astonishingly wide range of communication technologies. When Voyager made it's last transmission from the depths of space to earth, this could be considered computer networking (albeit with rather high latency) in that two computers were involved, one on each end of the signal and that one or more protocols understood by both computers were used.
Today, whether using WiFi, a LAN, a MAN or WAN etc. and whether the computers are connected by buried Fiber Optic cable or communicate via directional microwave antennas or any other electronic methodology, the basic technique (not the technology) is the same. Two computers must be able to communicate with each other in order to network. This communication MAY be serial or it MAY be parallel. Most frequently it is serial today.
Consider that a fiber optic cable can be in only one state at a time, either dark or illuminated (0 or 1). This communication is necessarily serial, but the high speed of light and the frequency at which switching from dark to lighted states is possible makes it incredibly fast. Likewise, if two fiber optic cables were used, connected to the same NICs (Network Interface Cards) theoretically, it would be possible to support parallel fiber optic communication directly from PC to PC. [JMH]
Is DNA something the user portrays that is known?
No. A biometric identification, such as fingerprint, retina scan or DNA sample portrays something that the user is.
Authentication is achieved in one of three ways:
- something the user is (a biometric reading)
- something a user has (such as an ID card)
- or something the user knows (such as a PIN)
For improved security, the user may be required to present two such authentications, such as an ID card and PIN. Or, preferably, all three, such as an ID card, PIN and retina scan.
What is the role of actuator in sensor network?
In a sensor network, an actuator serves as a device that responds to signals or commands from the sensor nodes or a central controller. It performs actions based on the data gathered by sensors, such as adjusting a valve, turning on a light, or moving a motor. Essentially, while sensors collect data from the environment, actuators translate that data into physical changes or responses, enabling automation and control within the network. This interaction enhances the network's functionality by allowing real-time responses to environmental conditions.
Do you drink all of the miralax in the packet?
Yes, when using Miralax, you should drink the entire contents of the packet mixed with the recommended amount of liquid, typically 8 ounces of water or another beverage. This ensures you receive the full dosage for effective relief from constipation. Always follow the instructions on the packaging or your healthcare provider's advice for the best results.
What is the maximum length of a greyhound?
The maximum length of a greyhound can vary, but they typically range from about 28 to 30 inches in height at the shoulder. When considering their body length, they can measure approximately 36 to 40 inches from nose to tail, depending on the individual dog. Greyhounds are known for their slender, elongated bodies, which contribute to their speed and agility.
To handle error messages when a message does not reach it's destination.
To announce timeouts and network congestion.
What do you turn on to share a printer with network users?
If your printer is attached directly to your computer, you should share it (the way you do it depends of your operating system). If your printer is connected directly to your network (WiFi or Ethernet) it should be properly configured.
The command access-list permit ip any any must be added to the last line of an access list to allow all other data packets to enter and exit the router.
How would school peer pressor factors?
School peer pressure factors can significantly influence student behavior, attitudes, and academic performance. Positive peer pressure can motivate students to excel and engage in healthy activities, while negative peer pressure may lead to risky behaviors, such as substance abuse or academic dishonesty. Additionally, the desire for acceptance can affect self-esteem and identity, pushing students to conform to group norms. Overall, peer dynamics play a crucial role in shaping the social and emotional landscape of the school environment.
Rank 5 things to build the masterpiece in your Lego network?
well here's the things to build the masterpiece: 10 sapphierse, 10 rubys, 10 diamons, 50 purple and green bricks, 30 dino scale. that's all i can remember!
