Networking Intermediate

What is SSL/TLS Certificate?

A digital certificate that authenticates a website identity and enables encrypted HTTPS connections.

SSL/TLS certificates establish trust between browsers and servers. They contain the domain name, issuing Certificate Authority (CA), public key, and validity dates. When a browser connects to an HTTPS site, it verifies the certificate chain.

Types include Domain Validation (DV), Organization Validation (OV), and Extended Validation (EV). Let's Encrypt provides free DV certificates. Certificates must be renewed before expiration.

Related Terms

A unique numerical label assigned to each device on a computer network for identification and communication.

VPN (Virtual Private Network)

A technology that creates an encrypted tunnel between your device and a remote server, securing internet traffic.

A modern, lightweight VPN protocol that uses state-of-the-art cryptography and minimal code for fast, secure tunneling.

A set of rules that control inbound and outbound traffic at the subnet level, acting as a stateless firewall in cloud and enterprise networks.

DNS over HTTPS (DoH)

A protocol that encrypts DNS queries by sending them over HTTPS, preventing eavesdropping and manipulation of DNS traffic.

DNS Record Types

Different types of DNS entries that map domain names to various information like IP addresses, mail servers, and verification strings.

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