|
A multilayer switch (MLS) is a computer networking device that switches on OSI layer 2 like an ordinary network switch and provides extra functions on higher OSI layers. Image File history File links Please see the file description page for further information. ...
A typical router simply sends incoming packets onto the appropriate IP address on its network. ...
Computer networking devices are units that mediate data in a computer network. ...
To meet Wikipedias quality standards, this article or section may require cleanup. ...
A modular network switch with 3 network modules (a total of 24 Ethernet and 14 Fast Ethernet ports) and one power supply. ...
It has been suggested that this article or section be merged with Open Systems Interconnection. ...
Layer 3 Switching
The major difference between the packet switching operation of a router and that of a Layer 3 switch is the physical implementation. In general-purpose routers, packet switching takes place using a microprocessor, whereas a Layer 3 switch performs this using application-specific integrated circuit (ASIC) hardware. A D-Link Wi-Fi NAT router, popular for home and small office networks A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. ...
The network layer is level three of the seven level OSI model. ...
An application-specific integrated circuit (ASIC) is an integrated circuit (IC) customised for a particular use, rather than intended for general-purpose use. ...
MultiLayer Switch (MLS) - OSI layer 3 and/or 4 A Multilayer Switch (MLS) can prioritize packets by the 6 bits in IP DSCP (differentiated services CodePoint). These 6 bits were used in the "old days" for Type of Service (ToS). A packet is the fundamental unit of information carriage in all modern computer networks that use packet switching. ...
The Internet Protocol (IP) is a data-oriented protocol used for communicating data across a packet-switched internetwork. ...
DiffServ or differentiated services is a method of trying to guarantee quality of service on large networks such as the Internet. ...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
The following 4 mappings are normally available in an MLS:
Many MLSs implement QoS differentiated services and/or integrated services in hardware. It has been suggested that this article or section be merged with Open Systems Interconnection. ...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
It has been suggested that TCP and UDP port be merged into this article or section. ...
In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service (QoS) refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the...
DiffServ or differentiated services is a method of trying to guarantee quality of service on large networks such as the Internet. ...
In computer networking, IntServ or integrated services is an architecture, which specifies the elements to guarantee quality of service (QoS) on networks. ...
Some MLS's are also able to route between VLAN and/or ports like a common router. The routing is normally as quick as switching (at wirespeed). According to Cisco, Level 3 switches are basically routers that switch based on Layer 3 information, the basic difference being processing speed and/or the way they do the switching; Level 3 switches use ASICs/hardware instead of the CPU/software that a router would. A virtual LAN, commonly known as a VLAN, is a logically segmented network mapped over physical hardware. ...
It has been suggested that TCP and UDP port be merged into this article or section. ...
A D-Link Wi-Fi NAT router, popular for home and small office networks A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. ...
A Cisco ASM/2-32EM router deployed at CERN in 1987. ...
A D-Link Wi-Fi NAT router, popular for home and small office networks A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. ...
The acronym ASIC, depending on context, may stand for: Application-specific integrated circuit ASIC programming language Australian Securities and Investments Commission This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ...
Hardware is the general term that is used to describe physical artifacts of a technology. ...
CPU redirects here. ...
Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ...
Layer 4-7 switch, web-switch, content-switch Some switches can use up to OSI layer 7 packet information; they are called layer 4-7 switches, content-switches, content services switches, web-switches or application-switches.
Content switches are typically used for load balancing among groups of servers. Load balancing can be for HTTP, HTTPS and/or VPN, or for any application TCP/IP traffic using a specific port. Load balancing often involves NAT so that the client of the load-balanced service is not fully aware of precisely which server is handling its requests. Some of the layer 4-7 switches can NAT at wirespeed. Content switches can often also be used to perform standard operations such as SSL encryption/decryption to reduce the load on the servers receiving the traffic, and to centralise the management of digital certificates. It has been suggested that this article or section be merged into Load balancing (computing). ...
HTTP (for HyperText Transfer Protocol) is the primary method used to convey information on the World Wide Web. ...
https is a URI scheme which is syntactically identical to the http: scheme normally used for accessing resources using HTTP. Using an https: URL indicates that HTTP is to be used, but with a different default port (443) and an additional encryption/authentication layer between HTTP and TCP. This system...
A Virtual Private Network, or VPN, is a private communications network usually used within a company, or by several different companies or organizations, communicating over a public network. ...
In computer networking, the process of network address translation (NAT, also known as network masquerading or IP-masquerading) involves re-writing the source and/or destination addresses of IP packets as they pass through a router or firewall. ...
In computer networking, the process of network address translation (NAT, also known as network masquerading or IP-masquerading) involves re-writing the source and/or destination addresses of IP packets as they pass through a router or firewall. ...
Secure Sockets Layer (SSL) and Transport Layer Security (TLS), its successor, are cryptographic protocols which provide secure communications on the Internet. ...
In cryptography, a public key certificate (or identity certificate) is a certificate which uses a digital signature to bind together a public key with an identity — information such as a the name of a person or an organisation, their address, and so forth. ...
Some types of application require that repeated requests from a client are directed at the same application server. Since the client isn't generally aware of which server it spoke to earlier, content switches define a notion of stickiness. For example, requests from the same source IP address are directed to the same application server each time. Stickiness can also be based on SSL Ids, and some content switches can even use cookies to provide this functionality. Secure Sockets Layer (SSL) and Transport Layer Security (TLS), its successor, are cryptographic protocols which provide secure communications on the Internet. ...
HTTP cookies, sometimes known as cookies or just cookies, are parcels of text sent by a server to a web browser and then sent back unchanged by the browser each time it accesses that server. ...
External links - Open Directory - Computers: Internet: Protocols: IP: Routing: Layer 3 Switching.
- Multilayer Switching: Between the Lines, Network Magazine 1 April 1999
Vendors are touting switches and routers with features at layer 2, layer 3, layer 4, and beyond. Here's how to separate fact from fiction. |
Feeds |
Contact