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Cisco simulator simple network connection operationTo complete the following steps: 1. configure the IP address and gateway of the PC first. activate the corresponding interface of the switch (the Cisco simulator is automatically enabled, so you do not need to activate it here) 3. start by adding IP addresses and static routes to the vro. Step 1: double-click the
Why should we review the issue of network firewall traversal today? Because in the daily project work and transport dimension encountered the problem of network traversal, such as Huawei Office phone system Mobile terminal access to open video conferencing and call, Huawei High-definition video conferencing system outside the
Firewall is undoubtedly the most widely recognized network security technology in the network security field. According to the data provided by CCID, this year, firewall accounts for 38.7% of the information security product market, slightly higher than Anti-Virus products, ranking first. In the past year, what new ide
"Data Collation" Cisco [OSI, IP Address, Network Segment, Subnet Mask]###concept###----------------------from20110712to201107161.networksegment{ Router;switch;bridge;} 2.lanblocks{broadcastdomain;broadcaststorm;multicast;lowbrandwidth;} 3.benefitsoftherouter{!forwardbroadcast;filtermsgsonlayer-3 ( Networklayer);} 4.benefitsoftheswitch{enhancelanperformance;supplymore Blandwidth;} 5.collisiondomain{datapacke
As a mechanism to enforce access control between networks or systems, firewall is an important means to ensure network security. You can customize different firewall systems based on different requirements and application environments. The firewall can be large enough to consist of several routers and bastion hosts, or
After three years of work in the network field, I personally think that learning Cisco network is basically equivalent to mastering the network. It is determined that ccna, ccnp, and CCIE (routing and switching) are adopted starting from routing and switching ). First, let's move these three mountains over and look at
Experiment Name: Cisco router network address translation (NAT)Experimental purpose: To achieve all intranet IP to use a small number of public IP network connection to the InternetExperiment Introduction:With the help of NAT technology, when the intranet private address sends packets to the router, the private address is converted to a legitimate public IP addre
In Windows Vista, how can we better protect network security? You can use the firewall that comes with Vista to implement most security measures. 1. Use the firewall to make remote maintenance more secure When using Internet shared bandwidth (ADSL) for dial-up Internet access, many network administrators prefer to use
Cisco L3 switch Policy Routing for network access and Traffic DistributionI. Description of the solution environment 1. There are two groups of Group1 and Group2 in the environment, respectively, to access the Internet from two different network outlets. 2. The core network is a Ci
Internet:1.OSI Reference Model: Physical layer, Data link layer, network layer, transport layer, Session layer, presentation layer, application layer2.TCP/IP Model:3.IP Address: 32-bit binarySubnet Mask: Network part host full 1, host bit full 0Gateway: IP address of the routerDNS server: Implementing name resolution4.IP Address Category: Class 5A:0nnnnnnn 00000000 00000000 00000000b:10nnnnnn nnnnnnnn 00000
Article title: linux network firewall. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Network Firewall security policy The overall security policy of an organization must be determ
Tags: cisco/remote configurationIn actual work our routing and switches are always placed in the room to facilitate our work we need to configure the routing and switches so that we can configure the routers and switches in the office or at home.This is a simple network topology diagram where a computer-connected route configures the switch across network segment
window| Firewall | Server in the daily management and maintenance of campus network, network security is getting more and more attention. Whether the campus network server is safe will directly affect the normal education and teaching work of the school. In order to improve the security of the campus
Router> Router>enable Router#configure Terminal Router (config) #archive Router (config-archive) #path Backup Destination address/Backup build file name Router (config-archive) #write-memory Example: Router (config-archive) #path flash:/ Backup destination path/$h-config Router (config-archive) #path ftp://IP address/$h-config Router (config-archive) #write-memory Where: The URL path of ' $h ' is automatically replaced with the hostname. "$h-config" is the base file name, and the parameters are
the extranet650) this.width=650; "style=" Float:none; "title=" 11.png "src=" http://s3.51cto.com/wyfs02/M01/71/4D/wKiom1XK34_ Zv5iraahexsvrtzu877.jpg "alt=" Wkiom1xk34_zv5iraahexsvrtzu877.jpg "/>9. Accessing test effects from intranet PC650) this.width=650; "style=" Float:none; "title=" 12.png "src=" http://s3.51cto.com/wyfs02/M00/71/49/ Wkiol1xk4zlaascbaabmyceihhe407.jpg "alt=" Wkiol1xk4zlaascbaabmyceihhe407.jpg "/>Nat Port Multiplexing Configuration:1. Look at the extranet web to see that no
According to the firewall structure classification can be divided into a single host firewall, router integrated firewall and distributed firewall three kinds. A single host firewall is the most traditional firewall, which is inde
"1" resolves the cisco switch password forgetting reset method:1, power off + the front panel hold down the mode key, and then re-power, always press the switch front panel port 1 indicates from green to off does not light off, automatically into the switch mode;2, input? See what configuration commands are (optional), enter "Flash-init" reset initialization, enter "Load-helper" to load the Help file, and see what "Dir flash" is in the Flash file. Fin
Analyzes the security firewall built in the gigabit network switch, and implements the Gigabit line rate switching by using the proxy plug-in of the gigabit network switch application service. The built-in security firewall will also be a highlight of gigabit network switche
As a mechanism of enforcing access control between network and system, firewall is an important means to ensure network security. Different firewall systems can be tailored to different requirements and application environments. Firewalls can be large to consist of several routers and bastion hosts, or small to just th
192.168.1.128 255.255.255.128Permit IP any anyR1 (config) #int S1/1R1 (config-if) #ip Access-group7. Without affecting other traffic, turn on the R2,R4 Telnet service and allow only HQ access. Division 1 and Division 2 cannot exchange visits, nor can they visit headquarters.R2r4R4 (config) #access-list 1 Permit 192.168.1.128 255.255.255.128R4 (config-line) #do sh Run | Se line vtyLine vty 0 4Access-class 1 inExec-timeout 0 0Logging synchronousLogin LocalGNS3 Test diagram:650) this.width=650; "h
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