packet tracer

UDP-based RTP transmission in the complex public network environment, especially 3G, 4G, WiFi network faced with packet loss, disorderly sequence, repetition, jitter and other issues, seriously affect the real-time audio and video interactive effect, even if it is a RTP packet lost, if the receiver does not do processing, will also lead to the appearance of video mosaic, This scheme uses a variety of method

Wireshark and TcpDump packet capture Analysis and Comparison Common packet capture analysis tools include Microsoft's Network Monitor and Message Analyzer, Sniff, WSExplorer, SpyNet, iptools, WinNetCap, WinSock Expert, Wireshark, and linux tcpdump. Today, we conducted an experimental test to compare and analyze two of them. Other users can use Baidu Google to test yiha ^_^. 1. Wireshark and tcpdump Introduc

; -NDo not convert the network address into a name; -TNo timestamp is printed on each output line; -VOutput a slightly detailed information. for example, the IP package can contain ttl and service type information; -VvOutputs detailed message information; -CAfter receiving the specified number of packages, tcpdump stops; -FReads expressions from the specified file and ignores other expressions; -INetwork interface of the listener; -RReads packages from a specified file (these packages are genera

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

The common ICMP packet Echo is the consulting information. The ping command uses this type of ICMP packet. When the ping command is used, an ICMP packet of the Echo-query type will be sent to the target host, and after the target host receives the ICMP packet, the Echo-response type ICMP

Layer-3 Ethernet switches are quite common, so I have studied the problems related to the CPU packet sending and receiving of layer-3 Ethernet switches. I would like to share them with you here, hoping they will be useful to you. Layer-3 Ethernet switches are developing rapidly. On the one hand, bandwidth and switching capacity of network devices are greatly increased, and the types of protocols supported by devices are also increasing with the increa

Implement router and packet filtering firewall in Linux Router and Firewall]Vro is a widely used device between IP segments. There are many ready-made products on the market. In applications, we often connect routers across the WAN and lan. Most router products are designed based on this need. However, with the expansion of the user's IP network, we need a router that can address multiple Ethernet networks. The traditional router products occasionall

Network Packet monitoring using raw socket programming in C # Author: Unknown When talking about socket programming, you may think of QQ and IE. That's right. Many other network tools, such as P2P and Netmeeting, are implemented at the application layer using socket. Socket is a network programming interface that is implemented on the network application layer. Windows Socket includes a set of system components that fully utilize the features of Micro

Use libpcap for packet capture and package settlement on Ubuntu 14.04 64-bit For development purposes, I decided to use the latest libpcap source code package for installation. To install the libpcap library in a Unix environment, you mustC compiler, flex, bison, etc. These packages are not available when Ubuntu is installed. To install flex, the m4 compiling environment is required. Otherwise, the error "GNU M4 is required" is prompted. 1. Install th

Article title: Network System Management-application layer packet capture solution and implementation. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　　 Introduction Packet capture needs generally come from filtering, conversion protocol, and

Analysis of data packet sending process in two-layer (link layer) Analysis of data packet sending process in two-layer (link layer)--lvyilong316 Description: The kernel version covered in this series of posts is 2.6.32When the upper layer is ready for a package, the link layer packet is sent to the link layer, which is handled primarily by the Dev_queue_xmit fun

When talking about socket programming, you may think of QQ and IE. That's right. Many other network tools such as P2P and Netmeeting are implemented at the application layer. Program Is also implemented using socket. Socket is a network programming interface that is implemented on the network application layer. Windows Socket includes a set of system components that fully utilize the features of Microsoft Windows message driver. The socket Specification Version 1.1 was released in January 1993

Transferred from Author's blog:Http://blog.csdn.net/cilong521/ When talking about socket programming, you may think of QQ and IE. That's right. Many other network tools, such as P2P and Netmeeting, are implemented at the application layer using socket. Socket is a network programming interface that is implemented on the network application layer. Windows Socket includes a set of system components that fully utilize the features of Microsoft Windows message driver. The socket Specification Versi

1. IntroductionThe so-called "underlying packet" refers to the "run" at the data link layer of the packet, simply said "Ethernet frame", and our common socket can only send "run" in the transport layer of TCP, UDP and other packets, these transport layer packets have been able to meet most of the demand, However, there are times when you need to send the underlying pack