traceroute packet

architecture is relatively simple, the steps of its routing process are not missing. The main steps are as follows: First step: When the user enters Ping 172.168.80.8 on host A, there is an Internet Control Message protocol in the host armor, which is abbreviated as ICMP. 　　This protocol creates a response request packet that contains only the letters in its data field. The second step: the Internet Control newspaper Inac the Council to give the payl

[Keywords] TCP/IP packet structure explanation network protocol In general, we only need to call some encapsulated functions or components for network programming to complete most of the work. However, in some special cases, we need to have a deep understanding. Network Packet structure and protocol analysis. Such as network monitoring and troubleshooting ...... The IP package is insecure, but it is the fo

Actually, for the tcpdump program, you can even say that this program is actually a customer experience, because not only can he analyze the packet flow direction, but the internal content of the packet can also be "audible". If the information you use is clear, on the router, it may have been heard by others! Awesome! So, let's get to know this experience! (Authorization: This tcpdump must use the root ide

provides a Transport Driver Interface (TDI) to the top, and interacts with the upper border of the NDIS middle layer through the NDIS interface, the bottom boundary of the NDIS intermediate layer interacts with the underlying NDIS miniport driver through the NDIS interface. Finally, the NDIS miniport driver uses the NDIS interface to interact with the netcard of the physical network device. Introduction to NDIS Interfaces The original communication can be viewed as follows: After the pr

Introduction The author was fortunate to participate in the overall project design of the third generation mobile communication technology test network of the Ministry of Information Industry and the design work of the Beijing Area Test Network project. 3G test Network adopts WCDMA R99, CDMA2000 1X, TD-SCDMA three kinds of technology construction. When considering the 3g scheme, we combine the characteristics of 3G network, based on satisfying the requirements of the test, and draw on the exper

Believe that every computer users know that the computer connected to the network, the local connection to connect, and send packet bytes and received packet bytes both to normal, the network can be used normally, otherwise there will be such or such a problem. However, sometimes people will encounter the local connection received packet bytes very little situati

is independent from those of the preceding vrouters. An AS border router can be a vro within a region or a regional border router.Specify a Router-DR: in a broadcast, multi-access network such as Ethernet, TokenRing, and FDDI environment), a specified Router Designated Router exists ), the specified router completes the following work in the OSPF Protocol: the router generates a link packet-network link used to describe the network segment, which con

Tags: Wireshark, sniffing, packet capture Wireshark entry and advanced series (1) This document is composed-Qingsong[Home page: http://blog.csdn.net/howeverpf.pdf original, please note the source! You can enter the keyword Wireshark, usage, and tutorial on Baidu to find a lot of related materials. So the question is, Why should I write this series of articles? Most of the materials you can find earlier may have two minor problems:

For those who study websites or related programmers, HTTP packet capture tools are often used to track webpages. However, mainstream packet capture software such as httpwatch and httpanalyzerstdv are charged, and the cracked version is often unstable. In fact, many browsers now have built-in free packet capture tools. Today we will introduce several small series

This article mainly introduces the Python socket network programming sticky packet problem, and now share to everyone, but also to make a reference. Come and see it together. One, sticky bag problem details 1, only TCP has sticky packet phenomenon, UDP never sticky packet Your program actually does not have the right to operate the network card directly, you op

Many people may not have a special understanding of the AS border router. Here we will mainly introduce the AS border router and the details of the link status packet classification. The internal router: when all the directly connected links on an OSPF router are in the same region, we call this router an internal router. The internal router only runs the OSPF Algorithm in its region. Regional Border Router: When a vro is connected to multiple regions

Network Layer -- IP packet header introduction IP packet is also called IP packet grouping. It is transmitted at the network layer in Layer 7 structure of ISO network. It consists of IP packet header and IP packet user data, the length of an IP

Structure and Principle Analysis of the packet capture module based on Linux-Linux Enterprise Application-Linux server application information. The following is a detailed description. This section discusses the structural features of the monitoring layer data packet capture module, discusses its principles in detail, and describes some important functions of the program that implements the data

Unlike UDP, TCP provides a reliable, connection-oriented, byte-throttling service. The reliability of TCP protocol mainly has the following guarantees: (1) The application data is segmented into the data block which TCP thinks is most suitable for sending. This is controlled in part by the "MSS" (maximum packet length) option, which is often referred to as a negotiation mechanism, which sets the length of the maximum block of data that TCP travels to

The network port uses the 1000M rate time to appear the network communication loses the packet +idc the computer room managed server communication is not smooth. Network failure: Switch port 1000M, network card is 1000M, NIC configuration is normal. You lose the packet at the interval of ping. The performance is packet loss in network communication, and other

R1 --------------- (vlan10) SW (vlan20) ------------------ R2Condition: R1: 192.168.1.1 mac: a R2: 192.168.1.2 mac: BSw is a layer-3 SwitchWhen R1 packets are forwarded to R2:When R1 receives the data packet, it queries the route table of R1. The purpose of querying the route table is to find the data packet from that interface. After finding the interface, what type of frames are encapsulated for the purpo

such as the Cisco 2960x-24ps-l (24,000 Gigabit Port 4,000 gigabit), forwarding bandwidth 108Gbps, switching bandwidth 216Gbps, packet forwarding rate 71.4Mpps, according to the non-clogging line speed forwarding to calculate, exchange capacity of 2*28*1gbps=56gbps, The nominal 216Gbps is much higher than this, why? Is it due to the different design of the switch matrix? How did he figure out the 216Gbps? Again, for example: its

Label: style blog HTTP Io ar OS use SP strong Wireshark introduction: Wireshark is one of the most popular and powerful open-source packet capture and analysis tools. Popular in the sectools security community, once surpassed metasploit, Nessus, aircrack-ng and other powerful tools. This software plays a major role in network security and forensic analysis. As a network data sniffing and protocol analyzer, it has become a required tool for network

Recently, RTP has naturally involved the jrtplib library, reading code 3.7.1, spare time, and some excerpt. I hope you can remember it quickly in the future. I also hope your friends can read it and point out improper information, we provide you with valuable suggestions to learn and make progress together.Next, the source code analysis notes are based on: # ifndef rtp_support_thread. The author uses related classes for background threads to process the receipt of RTP packets, however, we will a

PHP + Ajax has many functions that will be used in its small series. Today we have a login function implemented using PHP + Ajax. Let's look at an example of a PHP + Ajax mobile phone red packet sending program, the details are as follows. PHP + Ajax has many functions that will be used in its small series. Today we have a login function implemented using PHP + Ajax. Let's look at an example of a PHP + Ajax mobile phone red