显示标签为“cisco router”的博文。显示所有博文
显示标签为“cisco router”的博文。显示所有博文

2011年6月21日星期二

Router? Switch? Be Clear the Difference Between Router and Switch.


When someone talk about wholesale Cisco router and switch with me, I’m very confused about this. Router Switch? What are they? What are they used for? Oh, My Lady Gaga, complicated.
However, after I have found some details of switch router, it seems a little interesting. Because both router and switch are tightly related to network, to internet. If you have PCs, if you need to email to somebody, or if you want to chat with friends, they are necessarily contained. Haha, eager to get more information of router and switch. I search many details and “the difference between routers cisco and switch” through Google. Now, I’d like share some key info about router and switch.
 
What’s a router-switch? A router is a more sophisticated network device than either a switch or a hub. It is a device that forwards data packets across computer networks, and perform the data "traffic directing" functions on the Internet. On the Internet or on a large corporate network, for example, routers serve as intermediate destinations for network traffic. These routers receive TCP/IP packets, look inside each packet to identify the source and target IP addresses, then forward these packets as needed to ensure the data reaches its final destination. Routers for home networks (often called broadband routers) also can join multiple networks. These routers are designed specifically to join the home (LAN) to the Internet (WAN) for the purpose of Internet connection sharing. In contrast, neither hubs nor switches are capable of joining multiple networks or sharing an Internet connection.
And switch? A network switch or switching hub is a computer networking device that connects network segments. The term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model. By paying attention to the traffic that comes across it, it can "learn" where particular addresses are. For example, if it sees traffic from machine A coming in on port 2, it now knows that machine A is connected to that port and that traffic to machine A needs to only be sent to that port and not any of the others.
The two pieces of equipment (router and switch) look so similar and perform some similar functions, but each has its own distinct function to perform on a network. To be simple, switches create a network. Routers connect networks. A router links computers to the Internet, so users can share the connection. A router acts as a dispatcher, choosing the best path for information to travel so it's received quickly.
So what do you need? Buy cisco router or switch? After got these above, you can make sure that which you need. And more information of Cisco sale, you can visit RouterSwitch.com.

2011年5月19日星期四

Cisco Demos WLAN Controller for Branch Offices at Interop

Cisco Systems officials over the past few months have built out the capabilities of their Borderless Networks initiative in such areas as mobility, security and management. Now the networking giant is looking to extend the reach of the strategy into branch offices.

At Interop 2011 this week in Las Vegas, cisco router officials are showing off their new Flex 7500 Series Cloud Controller and new Integrated Services Router Web Security products for the ISR G2 branch router. The products are part of Cisco’s efforts to meet the demand from businesses that are looking to bring such key capabilities as management and security out of the branch offices and back into main headquarters, according to Prashanth Shenoy, senior manager of Borderless Networks marketing.

“Since data centers began consolidating about a decade ago, a lot of things have been moved out of the branch offices and into the central data center,” Shenoy said in an interview with eWEEK, adding that IT departments are being asked to grow the level of services they offer while seeing their staffing being reduced.

Despite that consolidation, businesses still need to offer the same level of service and user experience to their employees in the branch offices, he said. With the new products announced May 10, businesses will be able to consolidate more of their IT infrastructure in the central data center—a move that will help drive down capital and operational costs—without hurting the operations of the branch offices, and deliver their services through the increasingly popular cloud computing model.

The Flex 7500 Series Cloud Controller is housed in the data center, letting IT administrators remotely manage up to 500 branch offices from a central location. They can remotely wireless policies, manage the branch offices and offer security settings without the time and expense of having to physically go to the offices, Sylvia Hooks, senior manager of mobility marketing at cisco871 , said in an interview.

The new WLAN (wireless LAN) controller can control up to 2,000 WiFI access points—twice the number currently supported—and more than 20,000 clients from the data center, Hooks said. A goal was to “allow the branch office to be independent” while still getting the technology capabilities they need to do their jobs, she said.

 The controller is available immediately, starting at $47,955.

In addition, Cisco in July will start shipping the ISR Web Security software, which extends the company’s ScanSafe Cloud Web Security to branch offices by putting centralized Web protection and malware detection onto the ISR G2 branch router.

According to  cisco 871 officials, the new software will not require businesses to buy more hardware. Instead, the software is in the router, enabling branch offices to use local Internet access capabilities, which will save users time, money and resource that otherwise would go toward hardware deployments.

The software can be delivered via the cloud, while the management is done centrally, they said.

Cisco is aggressively building out its Borderless Networks efforts, which revolve around the idea of getting access to a company’s network anytime, from anywhere and through any device.