Recently made an ipxe through iscsi start PE experiment, now put here for your reference I will not talk about those pxe startup principle, interested can go to Baidu to have a look. First of all, we have to prepare several things, of course, I will give you the software, at the end of the article.
Ultra-long distance wavelength division transmission technology wavelength division transmission is the most commonly used backbone network transmission mode in optical fiber networks. Wavelength division transmission is composed of CWDM/DWDM wavelength division multiplexer, EDFA optical fiber amplifier and DCM dispersion compensator, so wavelength division transmission is systematic. I'm going to share it here today.
Today, no matter large or small enterprises, all industries are vigorously promoting information construction and upgrading, and constantly improve the competitiveness of enterprises. Network is the foundation of information construction. in the process of promoting informatization, it is necessary to ensure the security and stability of enterprise network. With the development of information technology, the security of enterprise computer network system
In this part, the experiment can not be done because there is no physical voice experimental equipment. This article mainly focuses on the collation of concepts. Speech basic concept classification interface trunk analog digital analog digital traditional voice FXS, FXO, E&ME1, T1PSTNE1 (2.048m), T1 (1
OPEN SOURCE SECURITYWe make network security easy. With thousands of enterprises using pfSense softw
TCP, a protocol that everyone is familiar with, for technicians, a thorough understanding of him means that half of our feet have stepped into the door of IT. The characteristic of TCP TCP provides a connection-oriented and reliable byte streaming service. Connection-oriented means an one-to-one connection (usually a
How does the Internet work? Text keywords: Internet, network operators, routers, request response this article to help you understand that abstract concepts have been omitted, and there will be inaccuracies, please ignore. People have been using the Internet for a long time, but if you need to learn about it
Install fedora21 and establish sharing under vmware 11 Note: the fedora kernel used is: 3.17.4-301.fc21.x86_64 can be viewed using the command: [root@localhost share fedo
The basic principle is as shown in the figure above: the client can enter the password of the server and verify the account before entering the server after entering the code code. The implementation is as follows: 1. Install the required components # yum-y install mercurial pam-dev
In the next few sections, we will take everyone to write the first single-chip microcomputer program. Before that, let's first understand some of the unique program syntax of 51 single-chip microcomputer and the basic operation pace of Keil software. Please be patient. We mainly use C language to program the single-chip microcomputer, and
Http://www.vulnweb.com/ has friends who are interested in testing sql injection vulnerabilities such as asp, php, aspx, etc., which can be used for practical practice. # Awesome Vulnerable Web App
# / bindatabase bashparts summation 0 for mem in `ps aux | awk'{print $6}'| grep-v 'RSS' `dosum=$ [$sum+$mem] doneecho "The t
Case description: our cooperative customers (domestic well-known electronic payment enterprises) responded that four machines called our interface service, but it was strange that two of the four machines were connected, two were impassable, and the impassable machines were occasionally blocked. This problem has been bothering them off and on for a long time.
1. TranslationRule: translation rules are used to convert inbound and outbound numbers, which are used in the egress of dial-peer, the entry of voice-port, and voip-incoming (global configuration), as shown in figure: dial-
Nova and Neutron node interface architecture diagram following the logical relationship of Nova nodes in the previous issue, this issue continues the topic of the previous issue, mainly talking about the components and interfaces on Neutron nodes, and continuing to refer to the "logic diagram". 1. Through the figure above, enter from the network node (Neutron)
This is the first in the 160crackme series. I will put the download link at the end of the article. Interested friends can play and have a look. It is a blatant provocation for us to open the file first, and we must kill him later. There are three buttons. It looks like the one on the right is a little easier. Just click on him at this time.
1. Count the number of occurrences of each number in the following text [liuwei@test tmp] $cat 1.log 1 22 33 4100 1 100 100 [liuwei@test tmp] $awk'{
As an IT network engineer, backing up the configuration of network devices is one of our daily tasks, but with the increase of devices, manual backups that used to be very erasy are now taking more and more time. As an IT lazy person, bloggers firmly believe that there must be a way to be lazy! Pre-preparation: 1. NTP
Usage scenario: the threshold value may need to be adjusted in production environment (such as Oracle, ELK, file server, etc.) due to the default number of processes, resource limits, sessions, and other deficiencies. For those who have experience here, I would like to give you some suggestions: 1. Try not to restart (temporary adjustment and repair).
1. The purpose of the experiment is to master how to configure SVI port on layer 3 switch to realize inter-VLAN routing. Second, experimental equipment: one layer 3 switch. One two-layer switch. Third, the experimental principle: in a switched network, a physical network is logically divided by VLAN, and different VLA
