👉 Non-resolvability in computer science refers to a situation where a program or application cannot resolve a specific identifier, such as a hostname, IP address, or port number. This inability can occur due to various reasons, including hardware limitations, software bugs, or network connectivity issues. Non-resolvable identifiers are often used in the context of DNS (Domain Name System) lookups and resolving IP addresses. In programming languages like Python, non-resolvability is typically handled by using a resolver class, such