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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

HTTP/HTTPS
The protocol used for transferring web pages and data between browsers and servers, with HTTPS adding encryption.
Network Packet
A formatted unit of data carried over a network, containing headers with routing information and a payload with the actual data.
MTU (Maximum Transmission Unit)
The maximum size of a data packet that can be transmitted over a network without fragmentation.
VPN (Virtual Private Network)
A technology that creates an encrypted tunnel between your device and a remote server, securing internet traffic.
DNS Record Types
Different types of DNS entries that map domain names to various information like IP addresses, mail servers, and verification strings.
IPv6
The latest version of the Internet Protocol with 128-bit addresses, designed to replace IPv4 and solve address exhaustion.
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