what is packet tracer

. Cisco router in the configuration of ports, or to understand the next few port names and purposes more meaningful, s port is the meaning of serial interface, also known as high-speed asynchronous serial port, is mainly connected to the WAN v.35 cable, commonly said routers and routers when used in connection. F port is a fastethernet interface, called Fast Eth

Tags: tle simulates a trunk mode ace 51cto fast spanning tree quick typeLoops are present in the network, and all loops are formed due to confusion caused by ambiguous destination paths. The loop has a great impact on the network. Spanning Tree protocol is a good solution to this problem.The idea of spanning a tree protocol topology is that, regardless of the physical connection between switches, the switch

Cisco Packet Tracer Experimental Tutorials This note is the experimental source of the school computer networks in the course of experimental data, I slightly collated some, in the implementation of the command line to add some comments, implementation is not unique, my implementation

successfully and you can view your saved files on the TFTP server.4. Restore your configuration file, ping the TFTP server, keep the connection, download from TFTP to the routerCopy tftp running-config Download the previously configured backup from TFTP and restore the router's configuration fileIP address of the 192.168.1.1 TFTP serverRUNNING-CONFIG-BK you want to restore the backed up files in TFTPRunning-config a name for your recovered files.Final reload, successful restart, successful reco

---restore content starts---1. Simple LAN BuildSwitch: 2960 s1Terminal equipment: Generic PCConfiguration PC1 Click >>descktop>>ip configuration IP 192.168.0.1 255.255.255.0 port FastEthernet0 fastethernet 0/1PC2 Click >>descktop>>ip configuration IP 192.168.0.2 255.255.255.0 port FastEthernet0 fastethernet 0/2PC3 Click >>descktop>>ip configuration IP 192.168.0.3 255.255.255.0 port FastEthernet0 fastethernet 0/3PC4 Click >>descktop>>ip configuration IP 192.168.0.4 255.255.255.0 port FastEthernet

packet length, so the upper layer Protocol requires the LLC to indicate.In the Ethernet_II frame, change the length field of 802.3 to type. It is not necessary to implement the LLC Sublayer, which contains only a single Mac Sublayer, when the upper layer protocol is distinguished by the Type field.Only now the manufacturers are using Ethernet_II. The actual effe

Group First, let's look at the concept of the next grouping. The so-called grouping is to divide a packet into smaller packets. For example, for a 10GB packet, it is not always a one-time delivery of the past bar, but it is divided into a number of small packets sent past. S

Let's start by recognizing what a packet loss is, and what kind of phenomenon is being lost to the network: Data is transmitted on the Internet on a packet-by-unit basis, w

Iris. Here, you can clearly see the MAC address, IP address, protocol type port number, and other details of the captured data packet. By analyzing the data, the network administrator can know what kind of data packets are active in the network. Note: The structure of the data packet is very complex. It

What is the maximum size of each UDP packet?65507 approximately equal to 64KWhy is the maximum 65507?Because the UDP header has 2 bytes for recording the package body length. 2 bytes can indicate the maximum value is: 2^16-1=64k-1=65535UDP header accounted for 8 bytes, IP he

The process of sk_buff encapsulation and Network Packet encapsulation is described in detail.It can be said that the sk_buff struct is the core of the Linux network protocol stack, and almost all operations are performed around the sk_buff struct, its importance is similar to that of BSD's mbuf (I have read "TCP/IP det

then receive the FIN packet from the other party. However, the closing status indicates that after you send the FIN packet, you have not received the ACK packet from the other party, but have also received the FIN packet from the other party. Under what circumstances will t

in a match inside a check code to get rid of a packet, you can also do log in the inside, do NAT, but the original intention of the Iptables framework does not allow you to do so but did not stop your behavior.We can see another detail in the details of the iptables execution flow (which is not drawn in the process above), namely that iptables is really not enou

. This process is problematic if the memory consumed by a process is larger than the CPU that is shown above. The network administrator will be able to troubleshoot these available processes individually. Seven, such as sometimes the network administrator can force some CPU-intensive processes to shut down, and then test whether the message loss has improved. If

rid of a packet, you can also do log in the inside, do NAT, but the original intention of the Iptables framework does not allow you to do so but did not stop your behavior.We can see another detail in the details of the iptables execution flow (which is not drawn in the process above), namely that iptables is really not enough to just determine "match" in match,

the software on Windows has no control over the network devices. But what if we don't want to use a third-party tool like this? Or do you want to do some of your own processing when sending and receiving, filtering the underlying package, or even more complex logic in the drive layer? If so, the use of WinPcap is not enough, we need to write a driver to complete this task.3. Low-level

What's that NetScaler Reset Packet?https://www.citrix.com/blogs/2014/05/20/whats-that-netscaler-reset-packet/A few weeks ago I wrote a blog post on what to empower and extend your default Wireshark configuration titled NetScaler + WIreshark = A Perfect combination! I ' d like-to-follow up-that-post with this article which focuses on

the receiving buffer is large enough, then, package obtained from the receiving buffer is placed in a message queue. PS: it is best to mark the length of the entire package in the packet header when sending the packet to facilitate unpacking.The queue can be solved using