Question
In 2021, a misconfiguration in this protocol not only caused Facebook’s DNS servers to be unreachable, but also locked out employees from physically accessing machines to fix the mistake. For 10 points each:
[10h] Name this protocol that uses TCP port 179 by default. This protocol is used to find optimal routes between autonomous systems on a network.
ANSWER: Border Gateway Protocol [or BGP]
[10m] Because Facebook’s domain name system was a single point of failure, it lacked this property. This property, which refers to duplicating hardware and software components to reduce the consequences of failures, improves fault tolerance.
ANSWER: redundancy
[10e] The Facebook outage caused a loss of routes using this protocol, often paired with TCP. This protocol’s namesake addresses, such as 127.0.0.1 for localhost, uniquely identify devices on a network.
ANSWER: IP [or Internet Protocol; accept TCP/IP; accept IPv4 or IPv6]
<Other Science>
Summary
| 2024 ACF Regionals @ JMU | 01/27/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Regionals @ Imperial | 01/27/2024 | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Regionals @ Vanderbilt | 01/27/2024 | Y | 4 | 12.50 | 100% | 25% | 0% |
| 2024 ACF Regionals @ MIT | 01/27/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
Data
| Brandeis A | Yale A | 0 | 10 | 10 | 20 |