Port numberProtocol Port number:The full name of the port number is the protocol port number, it is used for the application layer and transfer into the interaction, when creating a socket need to know the IP address and port number, here the
Now the general family Internet use ADSL telephone line more online, and the home generally have several computers, so how to make a few computers at the same time Internet. This is to use the broadband router, in general, there are several cable sockets on the broadband router, these network cable sockets on some labeled WAN, and some network port labeled LAN, in the end what is the meaning of it. And what difference does it have. Please look down.
F
Network administrators often need to connect to a vro to perform configuration verification, and statistical data review on the Cisco router. There are many methods to connect to a Cisco router, such as configuring a port, a secondary port, or using Telnet. However, I like to connect to the vro through the Console port for related management and configuration.
Th
I read an article in the "ziqingxing" friend blog about the implementation of a mini tool called "DuplexPipe. I didn't quite understand it at first. I read the open source code and wrote it in java, a jar package. Unfortunately, I don't know much about java, so I can't read it.After thinking about it for a long time, I decided to write it in C language. The initial goal was to build a program that can connect to the internal network sub-host hidden behind NAT from the Internet. After writing for
TTY Driver Architecture:1. TTY Concept Analysis1.1/dev/ttysca01.2/dev/tty1-n1.3/dev/consoleIn a Linux system, a terminal is a type of character device, which consists of many types, usually using a TTY for short-range end devices.. Serial Terminal (/dev/ttys*)The serial port terminal is the end device which uses the computer serial port connection. Linux considers each serial
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
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
As we all know, the vswitch ports are both layer-2 interfaces, and these interfaces are connected to physical ports. In a Vlan, these interfaces can be divided into access interfaces and relay ports. If the port of a vswitch uses an access port, it can only belong to a specific Vlan. If the port of a vswitch uses a relay port
Port Scan path:What is a scanner?A scanner automatically detects remote or local host security vulnerabilities.ProgramBy using a scanner, you can discover the distribution of various TCP ports on the remote server and the services provided and their software versions! This allows us to indirectly or intuitively understand the security problems of remote hosts.
Working PrincipleThe scanner collects a lot of useful information about the target host (f
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
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:
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