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Sockets: Discover port availability using Java
...ng the DatagramSocket as well to check if the port is avaliable in UDP and TCP.
Hope this helps.
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Pinging servers in Python
...) solution. Plus the pyping lib is very easy to use compared to using the TCP/IP sockets library. I wrote my ping program using both, and pyping is far quicker and easier to use, in my opinion, especially if one isn't familiar with using the TCP/IP sockets library.
– MikeyE
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SQL Server Script to create a new user
... application and reopen it
5- open 'SQL Server Configuration Manager' and tcp enabled for network
6-Double-click the TCP/IP protocol, go to the IP Addresses tab and scroll down to the IPAll section.
7-Specify the 1433 in the TCP Port field (or another port if 1433 is used by another MSSQL Server)...
Is GET data also encrypted in HTTPS?
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@Abhishek: The hostname isn't present in the TCP/IP header. I cover IP addresses in my answer.
– Marcelo Cantos
Mar 29 '14 at 2:22
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Connect to Amazon EC2 file directory using Filezilla and SFTP
...rityGroups -> SSH -> Inbound rules -> Edit -> Add Rule (
SSH|TCP|22|My IP(it's get ip automatically | name for rule) -> Save
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Simulate delayed and dropped packets on Linux
I would like to simulate packet delay and loss for UDP and TCP on Linux to measure the performance of an application. Is there a simple way to do this?
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RabbitMQ and relationship between channel and connection
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A Connection represents a real TCP connection to the message broker, whereas a Channel is a virtual connection (AMQP connection) inside it. This way you can use as many (virtual) connections as you want inside your application without overloading the broke...
What are the differences between LDAP and Active Directory?
...rd, Lightweight Directory Access Protocol, LDAP, is developed. It uses the TCP/IP stack and a string encoding scheme of the X.500 Directory Access Protocol (DAP), giving it more relevance on the Internet.
Lastly, based on this LDAP/X.500 stack, Microsoft implemented a modern directory service for W...
How to link Docker services across hosts?
...ker virtual network technology that acts as a virtual ethernet switch over TCP/UDP - all you need is a Docker container running Weave on your host.
What's interesting here is
Instead of links, use static IPs/hostnames in your virtual network
Hosts don't need full connectivity, a mesh is formed ba...
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...sing or wrong in JDBC URL.
DB server is down.
DB server doesn't accept TCP/IP connections.
DB server has run out of connections.
Something in between Java and DB is blocking connections, e.g. a firewall or proxy.
To solve the one or the other, follow the following advices:
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