Switch vs router vs Hub
Diff
Hub)
Switch)
Router)
Different levels of work
OSI Layer 1 Physical Layer
Layer 2 of OSI. The link layer switch uses the physical address or MAC address to determine the destination address for data forwarding.
Layer 3 of OSI, the network-layer router determines the data forwarding address using the idnumber (IP address) of different networks.
Operations in the Hub classOn the server we're going to do a series of operations through the hub class, so let's talk about what we can do.Send Message operation for clientCall the Helloclient method for all clientsClients.All.helloClient ();Call the Helloclient method for all clients except for a given ConnectionID clientClients.allexcept (Context.connectionid). Helloclient ();Invokes the Helloclient meth
Many enterprises build a VPN to build VoIP to achieve better call quality. However, after the establishment, only the VoIP contacts between the external and the central points can be established, and the communication between the external and external points cannot be established. This is because IPSec VPN is point-to-point communication and does not allow external nodes to communicate with each other. Therefore, star VPN networks cannot communicate with each other. The VPN
KT Session2: Mostly code implementation (KT is knowledge Transfer), our project Data Feed service is in a connecting link throughout the social hub project. Yes, we call Autonomy's API Service, presented to us through the filtered media Data, up we can provide to smartphone, store.hp.com to increase the store traffic, to facilitate the transaction., is the project structure diagram, provides the admin site to the marketing team to make the decision, t
/84/34/ Wkiol1eig2xgc4u4aadog6jav6e049.png "border=" 0 "/>4. Install the Exchange Server 2010 client and Hub Transport server roles, as shown in the following diagram.650) this.width=650; "height=" 433 "title=" Image ("style=" border:0px;padding-top:0px;padding-right:0px; Padding-left:0px;background-image:none; "alt=" Image ("src=") http://s3.51cto.com/wyfs02/M01/84/34/ Wkiol1eig2mtsxa2aavzikcvvla185.png "border=" 0 "/>650) this.width=650; "height=" 4
China will become the Asia Pacific Linux Hub
China will become another center of Linux. Osdl (openSource codeThe Development Lab announced on Wednesday that it had set up its first office in China in Beijing and will become the hub of Asia Pacific in terms of Linux usage and publicity.Osdl also has offices in Japan and the United States. Its offices in China are supported by the Min
In SharePoint 2010, you can share content types for each website by configuring content hub on its website set ).
The procedure is as follows:1. Choose "Management Center"> "Application Management"> "manage service applications;2. Select the "managed metadata service" service and click "properties" in the toolbar. (If this service is not available, create it through "new .)3. At the bottom of the property page, there is a "content type
Windows Server 2008 installs WinCE synchronization software that requires the installation of Microsoft ActiveSync 6.1 version.and cannot install activesync| Microsoft ActiveSync 4.5 version of the.In addition, we always pop up a dialog box during installation to prompt for the missing Windows components required by a Windows Mobile device center. because the Windows 2008 system does not have the desktop experience turned on function , so this problem will occur. turn on the desktop experience f
In the HUB-AND-SPOKE environment of mpls vpn, for the sake of security AND cost, the branches are not interconnected, AND the access between the branches must go through the firewall of the headquarters, both the security effect and the cost are saved.The experiment topology is as follows:Due to the existence of the downstream bits and domain tags in the anti-ring mechanism of OSPF, the route may not be received in the outbound VRF of r6. therefore, t
Then use Ctrl + Shift + ESC to eject the task ManagerClick Files--Run a new taskEnter "PowerShell" in the Open Fill box and check "Run as Administrator" below, OK!In the open window, enter the above content againForeach " $($_. installlocation) \appxmanifest.xml"}After the run is complete, try again to open theYou can also find the path to "PowerShell" on the disk, and then you can open the PowerShell window by right-clicking the administratorTip, I am using WIN10 Enterprise Edition, may have di
recently, users of the Win7 system have found that when the machine is turned on, the bottom right corner of the desktop will jump out of the USB root hub prompt. Sometimes it even pops up Microsoft USB 2.0 host controller simulator has been safely removed, and if you open Device Manager you will find the Microsoft USB 2.0 host controller simulator as an exclamation point. What should I do about it?
Workaround:
1, reinstall the motherboard driver an
Aliyun's mirror services are well done, including the commonly used Debian (Ubuntu) and Redhat (CentOS) mirrors, the repo of all kinds of open-source software, and Docker's container mirrors, all copy one on a domestic server. Download speed is no longer limited by the big firewall you know. System and various types of open source software backup directly to see http://mirrors.aliyun.com/, the following alone Docker hub in Ali's Mirror accelerator set
How does mac add itunes to the notification hub? Current MAC OS x the latest ITunes support Notification Center plug-in feature, allows us to directly in the notification of the heart to control the playback of music, very convenient. Here is a small series to give you a brief introduction of the specific method of operation.
1, first of all, in order to implement ITunes control in the Notification Center on your MAC, you need the OS X 10.10 versio
Dual-host switch (NewStartHA, SKYbility, hacmp, hp unix dual-host), hpux dual-host
1. Suse linux (NewStartHA ):#
Cli
Cli: ~>Service-migrate
Select service to migrate:
Current service:
0) bill
1) gdb
2) cancel
Select a service [0, 2]:
Enter the command line prompt for replacement.
2. AIX (HACMP ):
# Smit hacmp
Then enter:
Switch the resource from suibao01 to suib
Original URL: http://blog.sina.com.cn/s/blog_5bdee3020101pvgy.htmlOn the market, often flooded with a large number of dual sim phones, and many consumers just know that the phone can be inserted two cards, direct calls, and you really understand the meaning of it?In fact, in addition to dual SIM, the market's mobile phone want is also flooded with a variety of double, here I will first to explain to you!
Dual-card:Two long phone cards are available for mobile phones.
Dual waiting:Dual-network dual-number online at the same time. From a global perspective, the coexistence of the Internet and the Internet is a reality, and the coexistence of 2G and 3G is inevitable. Therefore, the existence of dual-mode or multi-mode m
Let you achieve: access to the telecommunications server to automatically use telecommunications lines, and access to the Netcom server automatically use the Netcom line. Internet friends are basically clear, the North Netcom and southern Telecom Internet communication bottlenecks, and not to say what is the cause of the specific, but this does give the application of the Internet has caused a great obstacle. Therefore, from the server and IDC operating point of view, there are many
be bidirectional.2. Because it is a round-table meeting, each server guard must have exactly two nearby servers. That is to say, each server's seat must have a server guard on both sides.3. A server guard cannot have a meeting. That is to say, at least three servers can have a meeting.
Solution:1. Read the question clearly. The requirement is "a few knights cannot form any circle with anyone "!! Here they are called "tragic Knight" first, and other people who can hold meetings are called "happy
A test machine is installed in the IDC. The system is Ubuntu9.04X64 and the master machine is IBMX336. The user needs a dual-line connection. Therefore, one Nic is used to configure the telecom address, and the other Nic is configured with the UNICOM address. After the system is installed, only one Unicom address and one Telecom address can be pinged, if the China Unicom address does not match the gateway, you can only ping the China Telecom address.
A test machine is installed in the IDC. The system is ubuntu9.04X64 and the master machine is IBMX336. The user needs to be dual-line. Therefore, one Nic is used to configure the telecom address, and the other Nic is configured with the Unicom address. after the system is installed, the IP address is configured and the Unicom address and the telecom address can only have one pi... A test machine is installed in the IDC. The system is ubuntu9.04 X64 an
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