without tag;In practice, various connection methods are implemented according to the access, Trunk, and hybrid properties of the device ports. The application of port attributes is also far beyond the simple VLAN member interconnect, especially our division, with Port properties to implement some relatively complex functions, such as Isolated-user VLAN, multicast VLAN.Principles of processing 3.3 Tag/untag
The single chip microcomputer multi-byte serial port receive (high-order research of serial port multi-byte receive send)Original address: Http://bbs.ednchina.com/BLOG_ARTICLE_3007162.HTMWork for more than a year, wrote a lot of single-chip computer serial program. The sense of the serial port multi-byte receive part of the logic relative to the configuration reg
0. PrefaceNC is a good tool for both ends of the network connection, but also a temporary port forwarding. (What is the permanent port forwarding?) With Iptables)SSH is also a good tool in this area, the advantage is that encryption is reliable reusable at one end of the operation, at the cost of having a login account.We know that SSH automatically encrypts and decrypts all network data between the SSH cli
Modify the ssh port and centosssh port of centosVi/etc/ssh/sshd_configFind the section # Port 22, which indicates that Port 22 is used by default, and add a line as follows:Port 34981
Save and exit
Then the service sshd restart
Note: Do not turn it off here.
In addition, open a new window and try to connect to sshd. If
Some people often ask me whether port aggregation refers to link aggregation or VLAN trunking? Why did the teacher tell them all about this name? Is it wrong with the teacher or in the book.
After studying the Internet for so long, I have been using these two words in practice. In fact, this is not the same thing.
I checked the definition on Baidu:
Link AggregationIs to combine two or more data channels into a single channel, the channel appears in a
Sharing of multi-thread port scanning tools implemented by Python and python port scanning
It was written two nights last night and finally the Py Port Scanner was finished. Let's call it version 0.1 as a Python multi-thread Port scanning tool.
The level is limited. To tell the truth, there are some puzzles and puzzles
What is port mapping?
Port mapping is also called Port forwarding, and some are called NAT, virtual server. Port mapping process just like your home in a Community B building room 2410, your friends to find you, to find the community doorway, do not know where you live which number? asked the gatekeeper security, the
The main function of Port-channel in practical work is to bundle two or more ports into a virtual channel.Interface Port-channel1Description Port (1/0/5-6)Switchport Trunk Encapsulation dot1qSwitchport Trunk allowed VLAN 10Switchport mode Trunk!Interface Port-channel2Description Po
First you must know that the port does not exist independently, it is dependent on the process. When a process is turned on, its corresponding port is turned on and the process shuts down, and the port is closed. The next time a process is turned on again, the corresponding port is turned on again. Instead of purely un
Wireshark analyzes non-standard port traffic and wireshark PortWireshark analysis of non-standard port traffic 2.2.2 analysis of non-standard port traffic Wireshark analysis of non-standard port traffic
Non-standard port numbers are always the most common concern of network
It is very convenient to install ftp on a Linux server to provide users with upload and download. However, if your server has enabled the iptables firewall, you need to set the ftp port. I have also used iptables to allow access from a port. why do I need to demonstrate the ftp port? Because the ftp port is really spec
This time, say "ports" and "Port numbers".Usually hear people say "open port 80th", in order to secure "do not open redundant ports" and so on. So, what are the ports or port numbers here?First, the "port" is a concept used on TCP or UDP and is often likened to "windows". Also, the
Prerequisite: First you must know that the port is not independent, it is dependent on the process. When a process is turned on, its corresponding port is turned on and the process shuts down, and the port is closed. The next time a process is turned on again, the corresponding port is turned on again. Instead of purel
Prerequisite: First you must know that the port is not independent, it is dependent on the process. When a process is turned on, its corresponding port is turned on and the process is closed, and the port is closed. The next time a process opens again, the corresponding port is opened again. Instead of simply understan
Tags: reserve list update out IV output put deployment article1. BackgroundWhen the Linux server starts, the specified port is monitored for bind, and if the port on the same machine is already in use, the listener fails and the program fails to start.When the Linux client connects to the server accept, the system allocates a local temporary port for the network
Commax serial port ing master
Keywords: serial port to TCP serial port to udp tcp to serial port UDP to serial port
Commax is a professional tool for RS232 ing RS232/422/485 serial port data and network data. It can work indep
C # serial port control, c # Serial Port
The serial port is the standard interface of a computer. Currently, a PC (Personal Computer) usually has at least two serial port COM1 and COM2. Serial interfaces are widely used in data communication, computer networks, and distributed industrial control systems. Serial Communi
Port speed limit:
Refers to the rate at which the port is throttled to a speed limit value.
Port Flow control:
On the basis of the port speed limit, if the port has the flow control function, you can control the packet rate to the speed limit value.
Example:
Linux port ing tool RINETD and port rining rinetd
Rinetd, a simple and easy-to-use tool in Linux, implements port ing, forwarding, and redirection.Official Website address http://www.boutell.com/rinetd
Software DownloadWget http://www.boutell.com/rinetd/http/rinetd.tar.gz
Unzip and installTar zxvf rinetd.tar.gzMakeMake install
Edit ConfigurationVi/etc/rinetd. con
Port mappings are also called port forwarding, virtual servers, and different broadband routers are named differently. A computer in the intranet needs port mapping to be on the Internet to open up services or receive data.
Port mappings are divided into dynamic and static. Dynamic
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