if a socket between the client and the server is closed (the tcp connection is closed), the client will not be able to re-establish an identical socket in a short period of time (two minutes according to the book). So my understanding is: join me to conn...

give an example, the local client accesses the remote mysql server 3306 port. requires access to remote port 3306. my question is: does the network of the local client need to apply? Local access to remote port 3306, which port is used by the local...

goal: golang service, prepare to get banner information of ip:port. if ip:port is http, you can get http response, if it is ssh service, you can get ssh service output information. Such as version information. pre-condition: the corresponding tcpAddr...

what I already know is that the http status code is sent to the client after the server sends the data. for a http request, the client sends the HTTP request after the three-way handshake (TCP), and the server sends TCP fragments in response to the req...

how does RT, understand that the TCP IP protocol is data flow oriented and the UDP protocol is Datagram oriented? ...

just learned tcp programming under linux, and just successfully implemented a simple backfire client-server. but there is a question: when the client finishes sending the file, it needs close (fd), so how can I tell the server that you can also close ...

there is an online Python application that occasionally deadlocks, that is, the process is present, but the call to the Api interface prompts . curl: (56) Recv failure: Connection reset by peer grab the tcp package locally via wireshark "TCP"...

has just realized the communication between two clients (tcp protocol under linux). The implementation idea is very simple, that is, one client sends a message, and the server first read to and then write to another client, and that s it. after caref...

suppose there is a piece of code on the server side with two threads open, one to process the client connection and one to read the message sent by the client. m_fd = socket(AF_INET, SOCK_STREAM, 0); bind(...); listen(...); pid_t pid; while (1) { ...

opened a tun network card to grab the package client http sends post 375 bytes seq: 148255172 ack:11241 bytes seq: 148255491 ack:1reply1s1504 bytes payload 48 54 54 50 (375 bytes)payload50 4f 53 53 Why is it truncated ...

< H1 > current solution < H1 > server bool is_server_disconnected(int client_socket) { set_flag(client_socket, O_NONBLOCK); char buffer[10]; int length = recv(client_socket, buffer, 10, 0); clr_flag(client_socket, O_NONBLOCK)...

how is the ack determined when the sender sends multiple message segments at the same time under the tcp protocol, and how does the seq determine when the receiver confirms the connection ...

suppose I now have a process that prints "hello world " in a loop. From a process perspective alone, will it be assigned a port number when I start it? in other words, is the port number only available when I get the process bound, or is it randomly ...

< H1 > python rookies say hello to all the bosses! Ask the boss questions! < H1 > < H1 > functions I need to implement < H1 > 1. Using the flask framework to provide web services is simply a few keystrokes and then some indication of status! Access ...

in some materials, I have seen that the time of close_wait can be infinitely long, so if you want to modify the time of close_wait, which file is that parameter in? ...

there is a section of demo, in the user-guide of netty s official website that is not very clear. original text: netty4.x user Guide Chinese: netty4.x user Guide the data packet sent by the client, The server receives it in the form of a stream,...

such as the question, is there something wrong with my understanding? Ask for advice. ...

Let s start with a simple piece of code: ...

1. When you make a request in the system, the Timing you see is the following result. Only 3 requests are concurrent at the same time. from the figure below, the request is suspended. Waiting and Content Download have a total of 134ms, which is very fa...

< H2 > I know the process and basis of the three-way handshake. You don t have to explain the basic concepts to me < H2 > < hr > the question is why the second handshake cannot be done 1. The information sent from the client to the server is delaye...