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Closed 11 years ago.
The process is in either user mode or kernel mode based on this fact i want to ask that how process in user mode can map virtual address to physical address when it has no access to uarea.
A user-mode process isn't supposed to know about physical addresses. That's the whole point of virtual memory.
EDIT:
It seems you're asking how a userspace program knows where to put it's data. It doesn't. It pretends it has the whole address space (0-4GB on x86) and the Operating System does whatever address translation is necessary to let the process pretend that.
Related
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 9 years ago.
What sort of testing is related to Java Message Queue? What sort of scenarios can I expect?
A basic wiki on how to test message queue is
http://wiki.pentaho.com/display/EAI/Processing+Message+Queues+with+Java+Messaging+Service+(JMS)
In case you are trying to test a message broker ... this oracle guide should help
http://docs.oracle.com/cd/E19340-01/820-6767/aeqas/index.html
Also a previous post talk more about Java MQ Testing in general
Mock or simulate Message Queue (JMS)
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
Is there an OS and browser neutral way to tell if someone is connected to a given website? Netstat doesn't seem to work because it shows only connections up to the router.
HTTP is a stateless protocol. There is no such thing as being "connected" to a website. If you're asking about the underlying TCP connection(s), there's still no guarantee that the connection is kept open across HTTP requests.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I heard someone saying that a "port should be opened" , said a person inside a closed room in our company. So I wonder that it is possible to close a port ! So is it true that a port can be closed and/or opened ? If so how to close it , and how to open it ?
Depending on you operating system, the firewall can be configured to block traffic on selected ports.
For example, on Windows 7, you can do this by opening the firewall advanced settings and creating a new rule for incoming/outgoing traffic.
I think the ports he is talking about is operating system related ports but not hardware related. Operating systems ports lie unused until a certain number, in which OS uses lot of ports for its internal functions. But sometime when a user wants to run a software like server and access it, he has to do it through one of the port. However hardware ports also can be thought as opened and closed, unless you connect it with a cable. Be it a mouse or anything, otherwise ports are opened, if cable is unused.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
What is the difference between each of those urls ?
When will i use each ?
http://localhost/x
http://localhost:80/x
http://myComputerName/x
http://127.0.0.1/x
http://localhost/x maps to 127.0.0.1 which is loopback. You can only use for
local testing and can not give it to anyone on your network to visit
the page.
http://localhost:80/x is same as first because by default http works on port 80 and if you don't specify the port 80 is asumed
http://myComputerName/x can be given to others on your network because then they can connect to IIS on your machine (by resolving your host name) on port 80 and request x page/folder
http://127.0.0.1/x is same as first. It is IP address equivalent of localhost.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I am new to servlet.I made a servlet on a computer in a LAN connected network when I am accessing that servlet from another computer which is connected to the first thru a switch it is not able to access that I am specifying the IP address of that computer in the url is it possible to do that or I am wrong somewhere please help
thnx in advance!!!!!!!!
Make sure that the proper port is open.
Also what OS?
What type of servlet?
what are you using to deploy it?
Is there a firewall?
Did you try to ping the ip address?