Cisco 6748 Switch Modules
Network Liquidators is the premier online destination
to buy and sell Cisco 6748 switch modules equipment. We keep an extensive inventory of new, refurbished, and used Cisco 6748
switch modules in stock at most times which are usually available for overnight delivery. Along with the Cisco 6748 switch modules,
we also carry many other accessories. |
If you cannot find the exact Cisco 6748 modules you are
looking for, please call one of our account executives at 1-800-998-9862 for a custom quote. if you are not sure what you need, we have
technicians on staff experienced with Cisco 6748 series
that can help you with your configurations. |
Cisco WS-X6748-GE-TX |
General Information
Information on Switches:
In a telecommunications network, a switch is a device that channels incoming data from any of multiple input ports to the specific output port that will take the data toward its intended destination. In the traditional circuit-switched telephone network, one or more switches are used to set up a dedicated though temporary connection or circuit for an exchange between two or more parties. On an Ethernet local area network (LAN), a switch determines from the physical device (Media Access Control or MAC) address in each incoming message frame which output port to forward it to and out of. In a wide area packet-switched network such as the Internet, a switch determines from the IP address in each packet which output port to use for the next part of its trip to the intended destination.
In the Open Systems Interconnection (OSI) communications model, a switch performs the layer 2 or Data-Link layer function. That is, it simply looks at each packet or data unit and determines from a physical address (the "MAC address") which device a data unit is intended for and switches it out toward that device. However, in wide area networks such as the Internet, the destination address requires a look-up in a routing table by a device known as a router. Some newer switches also perform routing functions (layer 3 or the Network layer functions in OSI) and are sometimes called IP switches.
On larger networks, the trip from one switch point to another in the network is called a hop. The time a switch takes to figure out where to forward a data unit is called its latency. The price paid for having the flexibility that switches provide in a network is this latency. Switches are found at the backbone and gateway levels of a network where one network connects with another and at the subnetwork level where data is being forwarded close to its destination or origin. The former are often known as core switches and the latter as desktop switches.
In the simplest networks, a switch is not required for messages that are sent and received within the network. For example, a local area network may be organized in a Token Ring or bus arrangement in which each possible destination inspects each message and reads any message with its address.
About Network Liquidators:
Network Liquidators (NWEQ) is in the business of providing their clients with a low cost solution for building and maintaining their network infrastructure. With over 20 years of experience in IT sales, we have the stock and know how to service our worldwide client base. NWEQ sells new sealed, new open box, used and refurbished systems. From the largest datacenters and Universities, to small to medium sized businesses, NWEQ is the industry leader.
Quality hardware
Every single unit of hardware that comes through NWEQ’s shipping dock is physically inspected and put through our thorough testing process by one of our Cisco or Extreme Networks certified engineers. All used and refurbished NWEQ gear comes with a Lifetime Warranty (end-user customers only)! Please inquire with your account representative for more details! Network Liquidators is your online reseller leader for used cisco routers.
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