Exam CISSP topic 1 question 235 discussion

The BEST description of the purpose of Border Gateway Protocol (BGP) is: D. Maintain a list of efficient network paths between autonomous systems. BGP is primarily used for routing and exchanging routing information between autonomous systems (ASes) on the Internet. It helps determine the most efficient paths for data to traverse between different ASes, making it a crucial protocol for internet routing and ensuring efficient data exchange across the global network. Option D accurately captures the core function of BGP.

Option "D" is explicitly mentioned in the Official CISSP CBK Rererence (4th edition).

The correct answer is D. Maintain a list of efficient network paths between autonomous systems. Explanation: Border Gateway Protocol (BGP) is an inter-domain routing protocol used to maintain a list of efficient network paths between autonomous systems (ASes) on the internet. Autonomous systems are large networks, such as ISPs, that operate under a single administrative domain. BGP allows these ASes to exchange routing information, enabling them to make informed decisions about the best paths for data traffic to take when traversing multiple networks. BGP is crucial for ensuring the reliable and efficient routing of data across the global internet.

BGP is a routing protocol that is used to distribute routing information between routers in different autonomous systems (AS) on the Internet. BGP routers maintain routing information in the form of a routing table, which is used to determine the best path for packets to take as they traverse the Internet. The primary purpose of BGP is to maintain a list of efficient network paths between autonomous systems, which is why the correct answer is D. Maintain a list of efficient network paths between autonomous systems. BGP is used to exchange routing information between different ASes and it uses a path-vector algorithm to determine the best path to a destination. It is used to exchange routing information for the Internet and between autonomous systems.

Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. https://en.wikipedia.org/wiki/Border_Gateway_Protocol#:~:text=Border%20Gateway%20Protocol%20(BGP)%20is,(AS)%20on%20the%20Internet.

Yep - BGP will help an ISP to connect with another ISP. So, "D" it is.