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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
What does it mean on the PSP when it says USB Mode?
When the PSP is in USB mode, it means it is connected to a PC, and the PC can now transfer files onto the PSP's memory card.
What is called degradation of signal over network cable?
It means that, as the signal travels over the wire, it will (a) get weaker, and (b) the signal for the individual bits will "spread out" until they overlap with the neighboring bits.
It means that, as the signal travels over the wire, it will (a) get weaker, and (b) the signal for the individual bits will "spread out" until they overlap with the neighboring bits.
It means that, as the signal travels over the wire, it will (a) get weaker, and (b) the signal for the individual bits will "spread out" until they overlap with the neighboring bits.
It means that, as the signal travels over the wire, it will (a) get weaker, and (b) the signal for the individual bits will "spread out" until they overlap with the neighboring bits.
What is Difference between edge chasing and path pushing algorithm?
In computer science, edge-chasing is an algorithm for deadlock detection in distributed systems.
Whenever a process A is blocked for some resource, a probe message is sent to all processes A may depend on. The probe message contains the process id of A along with the path that the message has followed through the distributed system. If a blocked process receives the probe it will update the path information and forward the probe to all the processes it depends on. Non-blocked processes may discard the probe.
If eventually the probe returns to process A, there is a circular waiting loop of blocked processes, and a deadlock is detected. Efficiently detecting such cycles in the "wait-for graph" of blocked processes is an important implementation problem.
What are different types of computing environments?
1) personal c.e
2)distributed c.e
3)cloud c.e
4)time saving c.e
How do you increase the range of a Wifi transmitter?
You can buy range extenders that work with the wireless router. Bestbuy has some belkin, d-link, netgear and some linksys ones. What I meant was something free. I've heard things like putting a pringles can over the antenna will increase the range. Is that true? If not, are there other things like that that would work? I have tried using cans as improvised "cantennas" over my wireless router's dipole antennas. The signal results were worse than without the cans. A cantenna must be built to the correct dimensions to provide any signal gain, and it replaces the entire antenna. An almost-free solution is to build a parabolic reflector for each of your transmitter's antennas, directing the signal only where it's needed. See http://www.freeantennas.com/projects/template/ The only materials needed are glue, tape, aluminum foil, and light cardstock (a file folder will do). Since the cardstock is "invisible" to your wifi devices, you can tape the left & right edges of the foil to the outside (convex side) of the reflector. When the reflector is bent into a parabola, having the foil on the outside will pull the foil smooth rather than crumpling it. Here's one I designed for specific antennas: http://24.106.181.178/geocorona/index.html A true parabola with the antenna in the correct focal point will precisely direct the radio signals from your wireless device (eg, laptop) to the antenna, and vice versa. A simple reflector such as a can or arbitrarily shaped foil will sometimes cause more interference than signal gain. For those with a Linux-based Linksys router, third-party firmware is available that will allow a capable Linux user to electronically boost the signal strength of the router, but this will not increase the router's ability to receive signals from the client devices it serves. A bi-directional amplifier for the 2.4 GHz frequencies is required to get a signal boost both ways. These amplifiers usually cost as much as the wireless router they boost.
Which is the best shortest path algorithm?
dijkstra's algorithm (note* there are different kinds of dijkstra's implementation) and growth graph algorithm
The history on your internet browser shows what websites you have recently visited.
How do you calculate a subnet mask address in networking?
Calculating a subnet mask depends on whether you are using the default, classful mask or a true subnet mask to divide a network into smaller pieces.
The defaults are on octet boundaries (every 8 bits):
255.0.0.0 class A network
255.255.0.0 class B network
255.255.255.0 class C network
Any other type of subnet mask with 4 octets (iPV4) can use combinations of those with any octet value from 0 - 255. No number may be larger than 255.
Calculating other subnet masks would be based on how many subnets you want in the network. You could have values such as:
255.192.0.0
255.255.248.0.0
255.255.255.252
The first octet must at least be 255. The other octets may change, based on whether it is a classful default network or it is being subnetted.
PPP server down is an error occurring (mainly?) on Orange Broadband Unlimited when Livebox cannot communicate with exchange server.
The reason for that situation is not clear. Customer Service by Orange is generally completely useless and cannot offer much help apart from waiting.
However, there is a great possibility you can fix that by yourself as long as you have access to a different ADSL modem.
Read the procedure described here: http://blogs.conchango.com/merrickchaffer/archive/2006/11/10/PPP-Server-down-with-Orange-broadband-livebox-modem.aspx
The key notes are: - it doesn't have to be the router mentioned in the post. It (probably) can be any router as long as it handles PPPOA and PPPOE protocols. Not sure if PPPOE is necessary. PPPOA is a must. - if this procedure doesn't work, try setting the modem into PPPOE (see if it connects) and then back to PPPOA (see if connects). If both atempts connected, you should be then able to use your livebox as well.
Try changing you ADSL filter
True or false Ethernet and 802.11 use the same frame structure?
Don't know what you mean by "Frame Structure" but they both share several protocols. Ethernet is 802.3 and WiFi is 802.11. Just from the naming you can see IEEE has placed them both under the 802. standards.
Duten's response: The person before me didn't even answer the question so why post. The answer is false, they have different frame structures.
What are the similarities between rsh and ssh utilities?
Both of these utilities allow a remote user to log in (remotely) and execute commands via the command line.
What is the purpose of the fast link pulse?
The purpose of the fast link pulse (FLP) burst is to "advertise" one computer's capabilities to another computer before a link is established between them. The FLP burst sends information to the other computer telling it, for example, how fast it is. The other computer then checks to see if this is an upgrade and, if it is, decides to use it when a link is established. The computer sending out the FLP then clocks itself at the same speed as the normal link pulse of the other computer, establishing a link with it. This process is called autonegotiation.
What is VPN and how to configure it?
Virtual Private Network (VPN) is a secured way to surf anonymously on internet. It can change the ip address and gives access in remote area on internet. I think its configuration process is in the sources and related links.
What is the difference between net and Internet?
Net and Internet are basically the same thing. Internet means more of a "communication" thing. Like, connected with others.
How do I fix Azureus Firewall nat tcp reachability problems?
If you do have this problem, please download any VPN and start your program again, this is because VPN will hide your IP and your server can't detect you either.
You have to have: 1 home computer that you don't turn off much, a wireless router, and another computer to connect with. Plug in the router to the "server" computer and go to Network and Sharing center. Setup wireless network WITHOUT internet connection. Both computers have to be in the same Workgroup.
How do you stop excessive pings to your server?
Block them at the router. Understand, however, that ICMP Echo Request/Reply (Ping) is a standard network troubleshooting tool, and that disabling it can compromise the ability to troubleshoot certain problems.
PATA- Parallel Advanced Technology Attachment
PATA is a standard for connecting hard drives into computer systems. As its name implies, PATA is based on parallel signaling technology
What is basic components of WAN?
First of all, WAN is an acronym for Wider Area Network. A good example of a WAN is the Internet. The basic components of a WAN would be routers, satellites, ISP mainframes, transmission media (Fiber Optics backbones, Power lines, network cables etc....i suppose satellites would also be classed as a transmission media). The most essential of an WAN Component can be Modems / Routers / Router abd Firewalls.
Examples of multi user operating system?
Example of multi-user OS include Unix server & thin client.
. In the Unix server, multiple remote users have the access to the Unix shell at the same time. In the case of thin client, multiple X WINDOW sessions are spread across various terminals. These terminals are powered by a single machine.
Categories of client server application?
1. office systems
2.front- end to existing systems
3. database access
4. transaction- processing applications
5. investigative applications
