A device that distributes network or application traffic across a number of servers. Load balancers are used to increase the capacity (concurrent users) and reliability of applications. See TLS. Related terms WAF, Web Application Firewall A web application firewall (WAF) guards web applications from a range of application-layer attacks including SQL injection, cross-site scripting (XSS), distributed denial of service (DDoS) attacks, and cookie poisoning API Gateway An API gateway accepts client API requests and directs them to the appropriate microservices via composition, request routing, and protocol translation. See the Noname API Security Platform in Action Book a Demo