World of Computer Networking Your CCNA start - Border Gateway Protocol (BGP) Prefix Lists

The video tutorial explains the BGP routing protocol, focusing on the concept of a full view, which involves receiving all networks from neighbors. It discusses the necessity of filtering private routes using prefix lists, as BGP lacks a built-in mechanism for this. Examples of prefix lists are provided, demonstrating how to block specific networks and subnets from being inserted into the BGP table. The tutorial also covers blocking reserved and multicast IP addresses. Finally, it highlights the complexity of BGP and its various metrics used in route selection.

What is the purpose of a BGP router receiving a 'full view' of networks?

• To block all public routes

• To have a complete list of all networks from its neighbors

• To enable faster data transmission

• To ensure all private routes are shared

Why must BGP routers filter out private routes?

• To prevent network congestion

• To comply with RFC 1918B

• To increase routing speed

• To allow private networks to be public

What is the role of prefix lists in BGP routers?

• To enhance network speed

• To encrypt data packets

• To allow all routes to pass through

• To block certain routes from being inserted into the BGP table

Which network is blocked by a prefix list with a mask range from 8 to 32?

• 192.168.0.0/16 only

• 127.0.0.1 only

• 10.0.0.0/8 and its subnetworks

• All multicast addresses

What type of IP addresses are considered multicast?

• Addresses with 1110 in the first octet

• Addresses with a mask of 0

• Addresses starting with 127

• Addresses in the range 192.168.0.0/16

What is the significance of the 'permit all zeros' record in a prefix list?

• It permits only private networks

• It allows all remaining networks not previously denied

• It denies all multicast addresses

• It blocks all networks

What is a key characteristic of the BGP routing protocol?

• It is simple and easy to configure

• It uses a single metric for route selection

• It only supports IPv4 addresses

• It is sophisticated with various metrics for route selection