In the enterprise, to realize that all employees can communicate with the Internet, everyone using a public address is very unrealistic. Generally, the enterprise has 1 or several public network address, and the enterprise has dozens of, hundreds of employees. How do you want all employees to use the only few public network addresses to communicate with the Internet? Use NAT Technology!In the enterprise, there will be a number of departments, such as finance Department, technical department, eng
The Java version of the spark Big Data Chinese word Segmentation Statistics program was completed, and after a week of effort, the Scala version of the sparkBig Data Chinese Word segmentation Statistics program also made out, here to share to you want to learn spark friends.The following is the final interface of the program, and the Java version is not very different:The following is the Scala engineering
VLANIt is a protocol proposed to solve Ethernet broadcast problems and security. It adds VLAN headers Based on Ethernet frames and divides users into smaller working groups using VLAN IDs, restrict mutual access between users in different working groups. Each working group is a virtual LAN. The following describes how to implement static VLAN interfaces of a swit
Summary:
In this article, we will discuss how to deploy the smoothwall proxy server in a typical campus network environment.
This section mainly discusses how to configure Static Routing in multiple VLANs (because of other problems such as localization, update, Port Mirroring, and Backflow ).
I have already demonstrated the situation clearly)
Campus Network Topology
Smoothwall Configuration:InternetIp: 202.98.30.69Mask: zookeeper without authorizationDG: 202.98.56.94DNS: 61.128.128.68
LAN:
Ip: 1
VLAN (VirtualLocalAreaNetwork) is a virtual network built based on Ethernet interaction technology. it can divide a physical network into multiple valns or overcome physical network barriers, users in different subnets are allocated to the same VLAN. This article mainly introduces Python black hat programming 3.4 Cross-VLAN information. For more information, see
To address the limitations of traditional VLANs and ensure the security of network communication to a greater extent, many VLAN extension technologies have emerged in recent years, this article mainly introduces PVLAN, SuperVLAN, SVLAN and other typical extended VLAN technologies. 1 PVLAN Technology (Private VLAN) PVLAN divides
Principle 1: VLAN Based on ports-physical ports on VLAN switches and internal PVC (permanent virtual circuit) ports. Advantage: it is easy to define VLAN members. You only need to define all ports as corresponding VLAN groups. Disadvantage: if a user leaves the original port to a port of a new switch, it must be redefi
h3c s5024p switch for the second time VLAN ExperimentExperiment 1PC1 and PC2 connected to the switch ports G0/1 and G0/2 belong to VLAN 1, G0/3 and G0/4 that are connected to PC3 and PC4 belong to VLAN 2,PC1, PC2, PC3, PC4 on the same network segment. Requirements PC1, PC2 can communicate with each other, PC3, PC4 can communicate with each other, PC1, PC2 and PC3
Refer to the H3C document below. Many ports are not necessarily the following three types. You can set the tag/untagged definition for import and export at will.
Differences between sending and receiving packets of different link types
Port type
Processing of received packets
Processing of sent packets
When the received message does not contain a tag
When the received packet carries a tag
Access Port
Add default VLA
In a network topology with two switches, can the same VLAN communicate? The answer is yes !!The Chinese meaning of trunk itself is: trunk, and trunk? In other words, it can carry something. It also plays a bearing role in the network, and it can carry multiple VLANs, enables communication between the same VLAN of different switching devices. As you can see, trunk also has its own structure. Since trunk is a
Lab Environment:650) this.width=650; "alt=" Cisco Packet Tracert three-tier switch VLAN configuration-Ibm.chick-mingkang.zhou "src=" Http://img2.ph.126.net/2N Qfixjyba1gdiqtbuknhq==/6630601572768576164.png "style=" border:0px;height:auto;margin:0px 10px 0px 0px; "/>Experimental Purpose:1, the three layer switch divides three VLANs, is Vlan2\vnal3\vlan4, and the VLAN IP is set to: 192.168.2.1, 192.168.3.1, 1
VLAN Implementation Mechanism After understanding why VLAN is needed, let's take a look at how a vswitch uses VLAN to separate broadcast domains.First, on a L2 Switch without any VLAN, any broadcast frame will be forwarded to all other ports except the acceptor port Flooding ). For example, after computer A sends broad
Lab objectives:1. Master the configuration of the switch Tag VLAN;2. master the basic configuration methods of layer-3 switches;3. Master how to configure VLAN routing for layer-3 switches;4. layer-3 switches are used to implement VLAN visibility and mutual communication;Technical Principles:A layer-3 Switch has the network layer function. The principle of implem
Failure phenomenon:
VLAN is a kind of virtual local area network, through VLAN can make the physical location in different network segment of the device group, can communicate as on the same network segment. This ensures that the reply packet always has the same VLAN ID tag as the incoming request packet. Packets that are passed in a
Tags: access switch interface information
First, we can see the following experiment topology:
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Except that the E0/0/5 and E0/0/1 ports connected to the two vswitches are trunk, and the other ports connected to the PC are all access interface types.
1: When the
A typical case of cisco VLAN configuration has seen some exchanges on the Internet. The vlan configuration is vague. I want to help my siblings by sorting out the information. Two switches and two Router Vlan test devices: two switches, two 2950 routers, and one 2620 test equipment. Two switches are required. Switch1 and Switch2 create VLANs respectively, in dot1
Huawei Hybrid-vlan, three-layer switching, DHCPTopology:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/54/73/wKioL1SC8-yidmH5AAFnbzaDL48113.jpg "title=" 1.png " alt= "Wkiol1sc8-yidmh5aafnbzadl48113.jpg"/>Demand:1. Router End VLAN2. Inter-switch VLAN transmission in hybrid mode3.PC Get IP with DHCPIdeas:1.TheGateway of the PC is on the router2. Configure Hybrid-vlan3. Configure DHCPSteps:Router A
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