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Questions and Answers
What does BGP stand for?
What does BGP stand for?
Which of the following best describes an autonomous system?
Which of the following best describes an autonomous system?
Which protocol is primarily used for routing information within the same autonomous system?
Which protocol is primarily used for routing information within the same autonomous system?
What is a key feature of BGP?
What is a key feature of BGP?
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Which protocol is NOT used to communicate between two different autonomous systems?
Which protocol is NOT used to communicate between two different autonomous systems?
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What type of updates does BGP support?
What type of updates does BGP support?
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To establish a neighborhood relationship between two routers using BGP, what must occur?
To establish a neighborhood relationship between two routers using BGP, what must occur?
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What is the main role of BGP in the context of the internet?
What is the main role of BGP in the context of the internet?
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What is the primary function of the Border Gateway Protocol (BGP)?
What is the primary function of the Border Gateway Protocol (BGP)?
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What led to the development of Border Gateway Protocol (BGP)?
What led to the development of Border Gateway Protocol (BGP)?
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Which protocol was used before BGP for connecting autonomous systems?
Which protocol was used before BGP for connecting autonomous systems?
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What major change did the implementation of autonomous systems bring to network routing?
What major change did the implementation of autonomous systems bring to network routing?
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What is a significant flaw that led to the decline of the Exterior Gateway Protocol (EGP)?
What is a significant flaw that led to the decline of the Exterior Gateway Protocol (EGP)?
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When was the first version of BGP released, and what RFC defined it?
When was the first version of BGP released, and what RFC defined it?
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Which protocol served as the first protocol for routing before the concept of autonomous systems was implemented?
Which protocol served as the first protocol for routing before the concept of autonomous systems was implemented?
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Which of the following statements is accurate regarding the types of autonomous systems?
Which of the following statements is accurate regarding the types of autonomous systems?
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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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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.
