Border Gateway Protocol (BGP) Overview
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Questions and Answers

What does BGP stand for?

  • Binary Gateway Protocol
  • Border Gateway Protocol (correct)
  • Border Gateway Program
  • Basic Gateway Protocol

    • Which of the following best describes an autonomous system?

  • A protocol for routing information
  • A single router operating independently
  • A network of routers operating under different organizations
  • A collection of networks under a common administrative domain (correct)

    • Which protocol is primarily used for routing information within the same autonomous system?

  • BGP
  • OSPF (correct)
  • EGP
  • RIP (correct)

    • What is a key feature of BGP?

    <p>It is a path vector protocol (A)</p> Signup and view all the answers

    Which protocol is NOT used to communicate between two different autonomous systems?

    <p>RIP (B), OSPF (C)</p> Signup and view all the answers

    What type of updates does BGP support?

    <p>Incremental and trigger updates (A)</p> Signup and view all the answers

    To establish a neighborhood relationship between two routers using BGP, what must occur?

    <p>Manual configuration of each router's neighbor identity (B)</p> Signup and view all the answers

    What is the main role of BGP in the context of the internet?

    <p>To exchange routing information between different autonomous systems (C)</p> Signup and view all the answers

    What is the primary function of the Border Gateway Protocol (BGP)?

    <p>To exchange routing information among autonomous systems (C)</p> Signup and view all the answers

    What led to the development of Border Gateway Protocol (BGP)?

    <p>The large size of the routing table due to the internet's expansion (B)</p> Signup and view all the answers

    Which protocol was used before BGP for connecting autonomous systems?

    <p>EGP (A)</p> Signup and view all the answers

    What major change did the implementation of autonomous systems bring to network routing?

    <p>The segregation of networks into manageable routing policies (C)</p> Signup and view all the answers

    What is a significant flaw that led to the decline of the Exterior Gateway Protocol (EGP)?

    <p>Limited scalability for larger networks (B)</p> Signup and view all the answers

    When was the first version of BGP released, and what RFC defined it?

    <p>1989, RFC 1105 (C)</p> Signup and view all the answers

    Which protocol served as the first protocol for routing before the concept of autonomous systems was implemented?

    <p>GGP (B)</p> Signup and view all the answers

    Which of the following statements is accurate regarding the types of autonomous systems?

    <p>Each autonomous system can be managed independently with its own routing policy (B)</p> Signup and view all the answers

    Flashcards

    Border Gateway Protocol (BGP)

    An inter-domain routing protocol used to exchange routing information among autonomous systems on the internet.

    Autonomous System

    A group of networks under a single administrative authority that share a common routing policy on the internet.

    BGP versions

    Different implementations of the Border Gateway Protocol, with version 1 being initial and followed by version 2 then version 3.

    Exterior Gateway Protocol (EGP)

    An older routing protocol used to connect autonomous systems before BGP.

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    Routing Table

    A database in a router that maps destinations to paths to them. Its size increases as networks grow.

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    ARPANET

    The first network, developed by the US Department of Defense to connect computers across the US.

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    GGP (Gateway to Gateway Protocol)

    The first routing protocol used within ARPANET.

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    RIP(Routing Information Protocol)

    A routing protocol that operates within a single autonomous system.

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    Autonomous System (AS)

    A collection of networks under a single administrative domain. It uses a unique number to identify itself.

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    Inter-domain Routing

    The process of exchanging routing information between different autonomous systems.

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    What is IGP?

    A protocol used for routing within the same autonomous system. Examples include RIP, EIGRP, and OSPF.

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    What is EGP?

    An older protocol used for routing between autonomous systems before BGP was standardized.

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    Path Vector Protocol

    A routing protocol that propagates routes along with the path they took to reach a destination.

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    BGP's Role on the Internet

    BGP is the protocol used for routing between different autonomous systems on the internet. It controls internet routing.

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    BGP's Incremental Updates

    BGP sends only the changes in routes to update its neighbors, making routing more efficient.

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    Study Notes

    Border Gateway Protocol (BGP)

    • BGP is an inter-domain routing protocol.
    • It uses path-vector routing.
    • It's a gateway protocol.
    • BGP exchanges routing information among autonomous systems on the internet.
    • BGP operates on different autonomous systems.
    • History of BGP is important.

    History of BGP

    • The first network was ARPANET, developed by the Department of Defense.
    • ARPANET had a single administrator handling all network functions and routers.
    • GGP (Gateway-to-Gateway Protocol) was the initial routing protocol in ARPANET.
    • GGP didn't use autonomous system numbers.
    • Internet growth created routing table issues with GGP.
    • Autonomous systems were introduced in the internet.
    • Autonomous systems resolved routing management with individual routing policies.
    • RIP (Routing Information Protocol), running on a single autonomous system was developed.
    • EGP (Exterior Gateway Protocol) was created to connect different autonomous systems.
    • EGP was used for five years.
    • BGP (Border Gateway Protocol) was developed due to flaws in EGP, defined in RFC 1105 in 1989.
    • BGP is defined in RFC 1105.

    BGP Versions

    • BGP version 1 was released in 1989 (RFC 1105).
    • BGP version 2 (RFC 1163).
    • BGP version 3 (RFC 1267).
    • BGP version 4 is the current version (RFC 1771).

    Autonomous Systems (AS)

    • An autonomous system is a collection of networks under a common administrative domain.
    • Organizations can have multiple locations but a single AS number.
    • Interior Gateway Protocols (IGPs) like RIP, IGRP, EIGRP, and OSPF are used within the same AS.
    • BGP (Border Gateway Protocol) is used for communication between different ASes.
    • BGP is the main protocol on the internet backbone.
    • BGP exchanges routing information across different autonomous systems.

    BGP Features

    • Open standard - BGP can run on any window device.
    • Exterior Gateway Protocol (EGP) - Used to exchange routing info between two or more ASes.
    • Inter-AS routing - Designed for routing among two or more autonomous systems.
    • Supports internet - It's the sole internet backbone protocol.
    • Classless - It's a classless protocol.
    • Incremental and trigger updates.
    • Path vector protocol - BGP sends the path along with routing information.
    • Neighborhood relationship - Routers manually configure their neighborhood relationships.
    • Application layer protocol - It uses TCP for reliability.
    • Metrics - Rich attributes like weight, origin affect path manipulation.
    • Administrative distance - 20 for external autonomous systems, 200 for the same autonomous system.

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    Related Documents

    BGP (Border Gateway Protocol) PDF

    Description

    This quiz explores the Border Gateway Protocol (BGP), an essential inter-domain routing protocol that facilitates routing information exchange among autonomous systems on the internet. It also covers the historical context of BGP, including the evolution from early protocols like GGP to the establishment of autonomous systems. Test your knowledge of BGP's functionality and its significance in today's internet architecture.

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