Word of the Day
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} @media (max-width: 520px) { .block-grid { min-width: 320px!important; max-width: 100%!important; width: 100%!important; display: block!important; } .col { min-width: 320px!important; max-width: 100%!important; width: 100%!important; display: block!important; } .col > div { margin: 0 auto; } img.fullwidth { max-width: 100%!important; } img.fullwidthOnMobile { max-width: 100%!important; } .no-stack .col { min-width: 0!important; display: table-cell!important; } .no-stack.two-up .col { width: 50%!important; } .no-stack.mixed-two-up .col.num4 { width: 33%!important; } .no-stack.mixed-two-up .col.num8 { width: 66%!important; } .no-stack.three-up .col.num4 { width: 33%!important; } .no-stack.four-up .col.num3 { width: 25%!important; } .mobile_hide { min-height: 0px!important; max-height: 0px!important; max-width: 0px!important; display: none!important; overflow: hidden!important; font-size: 0px!important; } } <!– Word of the Day Daily updates on the latest technology terms | August 28, 2019 <!– <!– Multiprotocol Label Switching (MPLS) Multiprotocol Label Switching (MPLS) is a protocol-agnostic routing technique designed to speed up and shape traffic flows across enterprise wide area and service provider networks. MPLS allows most data packets to be forwarded at Layer 2 — the switching level — rather than having to be passed up to Layer 3 — the routing level. For this reason, it is often informally described as operating at Layer 2.5. MPLS was created in the late 1990s as a more efficient alternative to traditional IP routing, which requires each router to independently determine a packet’s next hop by inspecting the packet’s destination IP address before consulting its own routing table. This process consumes time and hardware resources, potentially resulting in degraded performance for real-time applications such as voice and video. In an MPLS network, the very first router to receive a packet determines the packet’s entire route upfront, the identity of which is quickly conveyed to subsequent routers using a label in the packet header. While router hardware has improved exponentially since MPLS was first developed — somewhat diminishing its significance as a more efficient traffic management technology– it remains important and popular due to its various other benefits, particularly security, flexibility and traffic engineering. Components of MPLS One of the defining features of MPLS is its use of labels — the L in MPLS. Sandwiched between Layers 2 and 3, a label is a four-byte — 32-bit — identifier that conveys the packet’s predetermined forwarding path in an MPLS network. Labels can also contain information related to quality of service (QoS), indicating a packet’s priority level. MPLS labels consist of four parts: Label value: 20 bits Experimental: 3 bits Bottom of stack: 1 bit Time to live: 8 bits The paths, which are called label-switched paths (LSPs), enable service providers to decide ahead of time the best way for certain types of traffic to flow within a private or public network. How an MPLS network works In an MPLS network, each packet gets labeled on entry into the service provider’s network by the ingress router, also known as the label edge router (LER). This is also the router that decides the LSP the packet will take until it reaches its destination address. All the subsequent label-switching routers (LSRs) perform packet forwarding based…
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