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Leatning jornal unit 7
Learning journal
Course
Computer Network
29 Documents
Students shared 29 documents in this course
University
Lebanese International University
Academic year: 2024/2025
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Network communication via the internet is regulated by a set of rules known as
Transmission Control Protocol, or TCP. It controls how packets are sent over a network
to initiate conversation. TCP works together with IP to accomplish this. TCP guarantees
reliable data transmission between the server and its clients (Khan Academy, n.).
The TCP message "Connection Refused" is created when an incoming SYN request
encounters a listening port that does not match.
A SYN request is the initial packet that a program sends when it establishes a connection
with a TCP host. The link will be formed when the client responds with ACK and the
server listening on that port responds with SYN-ACK. Nonetheless, the server will reply
with the TCP message "Connection Refused" if it refuses to wait on the designated port
in response to a SYN request. Connection rejected problems usually occur when a
software tries to connect via TCP to an unavailable server port during a connected system
call. It could happen because of:
Misconfiguration: Using this example, let's imagine a user uses an out-of-date port or
inputs the wrong port number for the services.
Another reason for it to occur is a service problem. A service fault arises when an
application that ought to be waiting on a port fails or stops working (GeeksforGeeks,
2022).
References:
GeeksforGeeks. (2022, November 25). What is Transmission Control Protocol (TCP)?
GeeksforGeeks. Retrieved from geeksforgeeks/what-is-transmissioncontrol-
protocol-tcp/ Khan Academy. (n.). Transmission control protocol (TCP) (article).
Was this document helpful?
Leatning jornal unit 7
Course: Computer Network
29 Documents
Students shared 29 documents in this course
University: Lebanese International University
Was this document helpful?
Network communication via the internet is regulated by a set of rules known as
Transmission Control Protocol, or TCP. It controls how packets are sent over a network
to initiate conversation. TCP works together with IP to accomplish this. TCP guarantees
reliable data transmission between the server and its clients (Khan Academy, n.d.).
The TCP message "Connection Refused" is created when an incoming SYN request
encounters a listening port that does not match.
A SYN request is the initial packet that a program sends when it establishes a connection
with a TCP host. The link will be formed when the client responds with ACK and the
server listening on that port responds with SYN-ACK. Nonetheless, the server will reply
with the TCP message "Connection Refused" if it refuses to wait on the designated port
in response to a SYN request. Connection rejected problems usually occur when a
software tries to connect via TCP to an unavailable server port during a connected system
call. It could happen because of:
Misconfiguration: Using this example, let's imagine a user uses an out-of-date port or
inputs the wrong port number for the services.
Another reason for it to occur is a service problem. A service fault arises when an
application that ought to be waiting on a port fails or stops working (GeeksforGeeks,
2022).
References:
GeeksforGeeks. (2022, November 25). What is Transmission Control Protocol (TCP)?
GeeksforGeeks. Retrieved from https://www.geeksforgeeks.org/what-is-transmissioncontrol-
protocol-tcp/ Khan Academy. (n.d.). Transmission control protocol (TCP) (article).
