reset tcp ip stack

application layer protocol to encapsulate HTTP text information, and then uses TCP/IP as the transport layer protocol to send it to the network ."What is the most commonly used socket? In fact, socket is the encapsulation of the TCP/IP protocol. The Socket itself is not a protocol, but a call interface (API) through S

server side becomes established->close_wait->last_ack->closed.The above refers to a noun, 2MSL (Maximum Segment Lifetime)· The TIME_WAIT state isalso called the 2MSL WAIT state.· Every implementation mustchoose a value for the maximum segment Lifetime (MSL). It is the maximum amount of time any segment can exist in the network before being discarded.· RFC793 Specifies the Mslas 2 minutes. Common implementation values, however, are 30seconds, 1 minute, or 2 minutes. Recall that the limit on lif

) that can be called. We pass the socket to use the TCP/IP Protocol.The socket is not necessarily associated with the TCP/IP Protocol. The socket programming interface is designed to adapt to other network protocols as Well. so, the advent of sockets just makes it easier for programmers to use the

can reach. The client's TCP response is normal. While the server also knows the other side of the normal work, the server within 2 hours will be keepalive timer reset.(2) Customer host has crashed. And it shuts down or is starting again. In either case, the client's TCP is not responding. The server will not receive a response to the probe. and timed out after 7

vro, the TTL is reduced by 1, and 0 is dropped, and an ICMP message is sent to notify the source host. TTL can avoid continuous circulation of data between routers. 9. Protocol Type a) indicates which advanced protocol is hosted on the IP layer. In the process of encapsulation and sub-use, the protocol stack knows which layer the protocol should be handed over. 1 ICMP 2 IGMP 6

), so some books do not put this level in the TCP/IP protocol family, because it almost and tcp/ The creator of the IP protocol does not have any relationship. The host sending the protocol encapsulates the data from top to bottom, while the host receiving the data is untied from the received packet and finally gets th

TCP/IP protocol (Transmission control protocol/internet Protocol Transmission Control Protocol/Internet Interconnection Protocol) TCP/IP is a protocol Stack, including TCP, IP, UDP, ICM

Introduction: This article as a theoretical basis, will tell us the basic principles of TCP/IP and important protocol details, and on this basis, introduced the implementation of TCP/IP on Linux.OSI Reference Model and TCP/IP Refe

TCP/IP protocol stack This section briefly introduces the internal structure of TCP/IP and lays the foundation for discussing Internet-related security issues. TCP/IP protocol groups ar

Analysis of TCP/IP layer-4 protocol system and tcpip layer-4 Protocol TCP/IP layer-4 protocol system 1) The link layer, also known as the data link layer or network interface layer, usually includes the device driver in the operating system and the network interface card corresponding to the computer. They work togeth

languages have met each other and cannot communicate with each other. Therefore, they need to define something in common for communication, and TCP/IP is born for this. TCP/IP is not a single protocol, but a collective name of a protocol family. It includes the IP protocol,

extension is followed by the control bits. The control bit is a collection of 6-bit flags that indicate what state the TCP communicates with. The position of the control bit at 1 is Urg, indicating that the emergency data pointer is valid, the control bit is in 2 ack, the confirmation number is valid, and the control bit is PSH. Indicates the transfer force function; The control bit is RTS in 4, which indicates that the request connection is

and Max. # get socket Send/ Accept the size of the buffer: (The following value is the result of my test on the Linux 2.6.38 x86_64) sysctl net.. Wmem_default #126976 sysctl net.. Wmem_max #131071 sysctl net.. Wmem_default #126976 sysctl net.. Wmem_max #131071 Data that has been sent to the network still needs to be temporarily present in send buffer, and only after receiving an ACK from the other, kernel clears this part of the data from buffer and frees up space for subsequent

float between default and Max.# Gets the size of the Send/receive buffer for the socket: (The following values are the results I tested on the Linux 2.6.38 x86_64)Sysctl Net.core.wmem_default #126976Sysctl Net.core.wmem_max #131071Sysctl Net.core.wmem_default #126976Sysctl Net.core.wmem_max #131071Data that has been sent to the network still needs to be temporarily present in send buffer, and only after receiving an ACK from the other, kernel clears this part of the dat

network setup and troubleshooting when the network level is understood very well, will be a great help to the work. For example, to set up routing is the Network layer IP protocol, to find the MAC address is the link layer arp thing, the Common ping command is made by the ICMP protocol.Figure 5 shows the relationship of each layer protocol, and understanding the relationship between them is very important for the following protocol analysis.Figure 5

HTTP, FTP, SMTP, Telnet, etc. protocol, Oh! That HTTP protocol is the protocol that's used to access the Web. Actually ... You know, we should understand him from the reality, understand the function and function of the network protocol, and then from the fundamental point of view he is concrete how to achieve. We can start with HTTP, FTP, DHCP, DNS, ARP and other common protocols to understand how it works, and then follow this attitude to further understand the other protocols. Let's get down

processing as quickly as possible. This flag is always placed when dealing with interactive mode connections such as Telent or rlogin. FIN (finish) End sign Used to end a TCP/IP reply, but the corresponding port is still open and ready to receive subsequent data. RST (reset) Reset flag

have another problem. Even so, 1 m = 1048756 then 8 = 131072 then 1024 = 128 K. There should also be 120 kb. Why is the download speed still very low to kb, Thank God for all the help. After reading this article, your account is correct ...... 1. protocol hierarchy Protocol Stack: Layers in OSI Function TCP/IP protocol family Applicat

From the simplest of an HTTP request development, according to the TCP/IP protocol, separate the data frame structure of each layer, and how they assume the network service.Protocol stackThe Internet protocol stack consists of five layers:1. The application layer is where the network application and its application layer protocols persist. The application layer o

text information and then send it to the network using TCP/IP as the Transport layer protocol. ”And we usually say the most socket is what, in fact, the socket is the TCP/IP protocol encapsulation, the socket itself is not a protocol, but a call interface (API), through the socket, we can use the