Connecting to remote host from local server. #socket_programming #ehthical_hacking_tutorials смотреть онлайн

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We are using the socket.SOCK_STREAM sockets here, because we need a connection-oriented TCP protocol so that it will be reliable and faster than the connection-less protocols. Others are as follows:
*socket.SOCK_DGRAM
*socket.SOCK_RAW
*socket.SOCK_RDM
*socket.SOCK_SEQPACKET
These constants represent the socket types, used for the second argument to the socket() method. However, only SOCK_STREAM and SOCK_DGRAM are more useful. This is because SOCK_STREAM represents a connection-oriented protocol, and SOCK_DGRAM represents a connection-less protocol.
Depending on the context, the meaning of sockets may vary. Usually, a "client" socket is an endpoint of a conversation, and a "server" socket is more like a switchboard operator. The browser in your machine is an example of client application. It uses client sockets exclusively. But the web server uses both server sockets and client sockets.
Here Python's socket() method returns a socket object whose methods implement the various socket system calls.
A pair (host,port) is used for the AF_INET address family, where the host is a string representing either a hostname in an Internet domain notation like google.com or an IPv4 address like 100.50.200.5 and port is an integer.
For the AF_INET6 address family, a four-tuple (host, port, flow info, scope ID) is used. A tuple is an immutable list of collections.
Socket objects have many methods. They start with the socket.accept() method. They accept a connection. The socket must be bound to an address and listening for connections. The socket.close() method closes the socket.
Once you close the socket, all future operations on the socket object will fail. The remote end will receive no more data (after the queued data is flushed). We used the socket.connect(address) method in the previous example. This method connects to a remote socket at the address.

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