Facebook Network Engineer Interview Questions and Answers

BGP attributes used for controlling inbound & outbound traffic are Local Preference, AS Path, and MED.

• Local Preference: Used to influence the path selection within an autonomous system (AS). Higher value means preferred route.

• AS Path: Specifies the ASes that the route has traversed. Shorter AS Path is preferred.

• MED (Multi-Exit Discriminator): Used to influence the path selection between different ASes. Lower MED is pre

STP (Spanning Tree Protocol) processes are used to prevent network loops and ensure redundancy in a network.

• STP elects a root bridge to be the central point of the network.

• STP blocks redundant links to prevent loops.

• STP uses BPDU (Bridge Protocol Data Unit) messages to communicate between switches.

• STP has different port states: blocking, listening, learning, forwarding, and disabled.

• STP can be configured with different

DDoS stands for Distributed Denial of Service, a type of cyber attack that floods a network or website with traffic to make it unavailable.

• DDoS attacks are carried out by multiple compromised systems, often called a botnet.

• The goal of a DDoS attack is to overwhelm the target with traffic, making it impossible for legitimate users to access the service.

• DDoS attacks can be mitigated by using specialized hardware or softw...read more