Understanding the Relationship Between BGP and Facebook's Disappearance from the Internet, and the Impact of IPOs in 2020

Understanding the Relationship Between BGP and Facebook's Disappearance from the Internet, and the Impact of IPOs in 2020

In today's interconnected world, the Internet plays a vital role in our daily lives. We rely on it for communication, information, and even entertainment. But have you ever wondered how the Internet actually works? One crucial component that ensures the smooth functioning of the Internet is the Border Gateway Protocol (BGP). BGP acts as a mechanism for exchanging routing information between different networks, known as autonomous systems (AS).

To put it simply, BGP allows networks to communicate with each other and share information about the routes they can take to reach specific destinations. Without BGP, the Internet routers wouldn't know where to send data packets, and the Internet as we know it would cease to function.

Now, let's take a closer look at the recent incident where Facebook mysteriously disappeared from the Internet. It was as if someone had unplugged Facebook's data centers from the rest of the world. The root cause of this disappearance was the withdrawal of route announcements by Facebook through BGP. When Facebook stopped advertising its presence to other networks, it effectively disconnected itself from the Internet.

Every network, including Facebook, has an Autonomous System Number (ASN). An ASN represents an individual network with its own internal routing policies. For Facebook to remain connected to the Internet, it needs to announce its prefix routes (the IP address ranges it controls) to other networks using BGP. By doing so, other networks can establish connections with Facebook and know how to find its servers.

On a specific day, at 1658 UTC, it was noticed that Facebook had stopped announcing the routes to their DNS prefixes. This meant that Facebook's DNS servers, which are responsible for translating domain names into IP addresses, became unavailable. As a result, both Facebook and its associated sites went offline, leaving millions of users unable to access their services.

The incident highlighted the critical role BGP plays in maintaining the integrity of the Internet. It serves as the glue that holds the network of networks together, ensuring seamless connectivity and communication. Without BGP, the Internet would be fragmented, and accessing different websites or services would become nearly impossible.

Switching gears, let's delve into the world of Initial Public Offerings (IPOs) and their impact on the financial markets. In 2020, despite the challenges posed by the COVID-19 pandemic, the IPO market witnessed significant activity. Many companies went public, aiming to raise capital and expand their operations. However, the success of an IPO is often measured by the "pop" it experiences on the first day of trading.