可以肯定地说，在城域网和广域网方面，以太网都有厉害的竞争者。

To be sure, Ethernet has some serious competitors in both MANs and WANs.

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而传输控制协议（TCP）作为一种端到端的传输层协议已经广泛的应用在因特网络和广域网中。

While Transmission Control Protocol (TCP) is widely adopted end to end transport layer protocol on the Internet and Wide Area Networks (WAN).

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此外，与其他技术不一样，mpls不会增加预算，因为很多现有的路由器和广域网交换器支持此标准。

Additionally, unlike other technologies, MPLS won't consume your budget because many existing routers and WAN switches support the standard.

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