[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-05。"],[],[],null,["# Key terms\n=========\n\nThis page provides important terms that apply to Cloud Router.\nReview these terms to better understand how Cloud Router works.\n\nFor more information, see the\n[Cloud Router overview](/network-connectivity/docs/router/concepts/overview).\n\nBorder Gateway Protocol (BGP) terms\n-----------------------------------\n\nThe following terminology applies to the\n[Border Gateway Protocol (BGP)](https://wikipedia.org/wiki/Border_Gateway_Protocol),\nwhich Cloud VPN and Cloud Interconnect use for dynamic routing.\nBorder Gateway Protocol (BGP) An exterior gateway routing protocol standardized by the Internet Engineering Task Force (IETF) in [RFC 1722](https://tools.ietf.org/html/rfc1772). BGP automatically exchanges routing and reachability information among autonomous systems on the internet. Your device is BGP-capable if it can perform BGP routing, which means that you can enable the BGP protocol on it and assign it a BGP IP address and an autonomous system number. To determine if your device supports BGP, see the vendor information for your device or contact your device's vendor. [autonomous system (AS)](https://wikipedia.org/wiki/Autonomous_system_(Internet)) A collection of connected IP routing prefixes under the control of a single administrative entity or domain that presents a common routing policy to the internet, such as an internet service provider (ISP), a large company, or a university. autonomous system number (ASN) A unique identifier allocated to each autonomous system that uses BGP routing. For more information, see [RFC 7300](https://tools.ietf.org/html/rfc7300). MD5 authentication A method of BGP peer authentication that uses the MD5 message-digest algorithm. When you use this approach, BGP peers must use the same authentication key, or a connection cannot be established between them. Later, every segment routed between the peers is verified. For more information about MD5 authentication, see [RFC 2385](https://datatracker.ietf.org/doc/html/rfc2385). To find out whether your device supports MD5 authentication, see the vendor information for the device or contact the vendor. To get support with using Cloud Router MD5 authentication, see [Support](/network-connectivity/docs/router/support/getting-support).\n\nGoogle Cloud terms\n------------------\n\nThe following terminology applies to Google Cloud and its features.\nGoogle Cloud Google Cloud is a suite of public cloud computing services offered by Google. For more information, see [Google Cloud products](/products). project ID The ID of your Google Cloud project. A project contains networking resources such as networks, subnets, and Cloud VPN gateways as described in the [VPC network overview](/vpc/docs/vpc#specifications). For a description of the difference between *project name* , *project ID* , and *project\nnumber* , see [Identifying projects](/resource-manager/docs/creating-managing-projects#identifying_projects). You can view the project ID in the [Google Cloud console](https://console.cloud.google.com/)."]]
