traffic detection module for mirroring traffic analysis, The scheduling system can still maintain a variety of policy control of the cleaning equipment, deployment examples are as follows:As mentioned above, this hybrid scheme is essentially a bypass deployment for cleaning equipment, but in form and effect is an on-line solution (switchable to bypass effect) and ensures the absolute control and flexibility of the core dispatch for traction and back-injection.Flow traction and back-noteThe flow
nearly 30%, mainly because 3Com products easy to install, management and maintenance, can be said that 3Com of Gigabit Ethernet technology to popularize the work. The 3Com superstack 3 switch 4.9 million Gigabit Ethernet switch product line has been a great success. It can be seen that the 3Com walk is Low-cost, high-performance route.
Foundry from high to low has Bigiron, Fastiron and Netiron several series of products, including Bigiron backplane bandwidth up to 480Gbps. It is worth mentioni
With the development of the exchange industry, many new products have emerged. Among them, the Core routing switch is one of them, and it supports high-performance 10-Gigabit interfaces to improve the overall efficiency of the network. Quidway S8500 series 10-Gigabit core route switch is a new generation high-performance 10-Gigabit core route switch developed by Huawei 3Com, it can be widely used in the core layer of the E-government network, the core layer of the campus network and the Educatio
With the development of China's exchange industry, various switches have been updated and upgraded. Here we analyze the comprehensive performance and Practical Application of Huawei's 10G core route switch, quidway S8500 series 10-Gigabit core route switch (S8500) is a new generation of high-performance core route switch developed by Huawei. It provides high-capacity, high-density, and modular layer-4 line rate forwarding performance, powerful IP routing performance.
It also supports distributed
establishment of a secure Network connection on a non-secure Network. Generally, it provides the following services: verification, encryption, and data integrity. VPN can be divided into leased line VPN and dial-up VPN (also known as VPDN, Virtual Private Dialing Network) according to the access method. According to the protocol type, the second layer tunnel protocol includes the point-to-point tunnel protocol (PPTP, point to Point Tunnel Protocol), L2 Forwarding Protocol (L2F, Layer 2 Forwardi
Welcome to the network technology community forum and interact with 2 million technical staff. Therefore, do not convert each specific LSP table in the MPLS core network separately. The LSP is created between each PE device, 2. Next, the specific LSP table establishes a tunnel between these PES and the LPS of the PE, allowing the core network to be better upgraded and exchanged
Welcome to the network technology community forum and interact with 2 mil
. MSTP, Traditional Ethernet devices, and Carrier-class Ethernet devices, such as Carrier Ethernet, are coming soon. At present, Carrier Ethernet is particularly popular, because Carrier Ethernet defines Carrier-level attributes, it is an organic combination of "Carrier-level attributes + Ethernet businesses", or is a kind of "providing operation, maintenance, and management OAM similar to SDH, and has the new concept of low cost and flexibility of Ethernet. At the same time, TDM services, such
Network Test content
Although operators tend to build private networks based on their current network construction ideas, as a carrier-level IP bearer network, from the perspective of actual deployment of existing networks, the core network should have some common content, namely, deploying MPLS technology across the network, supporting BGP/MPLSVPN, providing QoS support and high reliability. Therefore, in the network test, the specific test content s
adopts the distributed CrossBar and distributed switching architecture to solve problems such as large-capacity switching and multi-service provision, therefore, it can help users' networks better achieve these convergence.
For the integration of data, voice, and video services, the CrossBar chip of the Business Board can simplify the large data streams of voice and video into a fixed-length switching mode, improving the switching efficiency. This is one of the reasons why BigHammer6800 can ach
PPP transmission over Ethernet (pppoe)Rfc2526 any subnet transfer address reserved by IPv6Rfc2541 DNS Security Operation considerationsRfc2547 BGP/MPLS VPNsRfc2554 SMTP service authentication extensionRfc2560 X.509 Internet Public Key Infrastructure Online Certificate Status Protocol-OCSPRfc2570 standard Interconnected Network Management Framework IntroductionRfc2577 FTP security considerationsRfc2581 TCP congestion controlRfc2582 Fast TCP recovery a
) refers to the establishment of a secure network connection on a non-secure network. Generally, it provides the following services: verification, encryption, and data integrity. VPN can be divided into leased line VPN and dial-up VPN (also known as VPDN, virtual private Dialing Network) according to the access method. According to the protocol type, the second layer tunnel protocol includes the point-to-point tunnel protocol (PPTP, point to Point tunnel protocol), L2 forwarding protocol (l2f, L
is developed from switches, and GSR internally splits data into standard cell exchanges, in terms of queue and scheduling, GSR is better as a pure core router because it has been tested for many years. In terms of price, 7609 is still relatively expensive, while GSR is cheaper in some cases.
2. Which route table of ISIS level1 includes? When there are multiple levels-1-2 exits, Where do other routes learn from and how do I select routes?
A: Isis level1 and level2 maintain LSD and SPF. level1's
The LDP determines the integrity of the session by detecting the LDPPDU transmitted on the session connection, LSR a live state timer for each session, refreshes the timer every time a LDPPDU is received, and if the timer times out before the new LDPPDU is received, LSR thinks the session is interrupted and the equivalence relationship fails. LSR closes the corresponding transport layer connection and terminates the session process.
Second, the establishment of LSP in the
=cantakeoneofthesethreevalues:# enforcing-SELinuxsecuritypolicyisenforced.# permissive-SELinuxprintswarningsinsteadofenforcing.# disabled-noselinuxpolicyisloaded. selinux=disabled#selinuxtype=cantakeoneofthesetwovalues:# targeted-Targetedprocessesareprotected,# mls-multilevelsecurityprotection. Selinuxtype=targeted Strict: Each process is under the control of SELinux #centos5默认使用的策略?targeted: used to protect common network services, only limited proce
indicate whether logs are stored in the data dictionary.
Log export table in
The name of the parameter file to be exported. This file will contain all the input parameters
Item
ANALYZE indicates whether to write the statistics of the migrated object to the export dump file.
The CONSISTENT indicates whether to retain CONSISTENT read replication of all exported objects.
Name of the file to be written in the LOG export LOG
MLS indicates whether to expor
command description .? Same as help.Format :? [Command]Note: [command] specifies the name of the command that requires help. If no command is specified, the ftp command parameters in linux will display the list of all commands.FTP> dir: displays remote directory documentation and subdirectory listFormat: dir [remote-directory] [local-file]Description: remote-directory specifies the directory to view its list. If no directory is specified, the current working directory on the remote computer wil
exported. Execute the table export operations for these tables.
The length (in bytes) of the recordlength dump export file log, which is usually used by default, unless the export file is transferred in two different operating systems
The type of the export operation that inctype is executing (valid values include complete (default value), cumulative and ivcremental)
A record in the incremental export type indicates whether logs are stored in the table exported from the data dictionary.
service, program, or user attempts to access or modify a file or resource that it does not need, its request is rejected and this action is recorded. Because SELinux is used in the kernel, SELinux can be used for applications without special writing or rewriting. Of course, if a program pays special attention to the SELinux Error Code mentioned later, its operation may be smoother. If SELinux blocks an action, it reports a standard (at least regular) "Access Denied" error to the application. Ho
1. Access Control Mechanism (ACM)
ACM: access control mechanisms
ACM provides system administrators with a way to control which users and processes can access different files, devices, and interfaces. ACM is a major consideration for ensuring the security of computer systems or networks.
ACM provides the following six methods:
1) independent access control: Discretionary Access Control (DAC)
2) Access Control List: access control lists (ACLs)
3) Mandatory Access Control: Mandatory Access Control
remote files to the local device
· Mkdir-create a remote directory
· Mls-list the contents of Multiple Remote Directories
· Mput-copy one or more local files to a remote device
· Open-connect to the specified FTP Server
· Prompt-switch interaction prompt (ON by default)
· Put-copy a local file to a remote device
· Pwd-display the remote current working directory (literally: print the working directory)
· Quit-ends an FTP session and exits FTP (functi
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