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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

OSI Model
The seven-layer Open Systems Interconnection model that standardizes network communication functions from physical transmission to application protocols.
HTTP/HTTPS
The protocol used for transferring web pages and data between browsers and servers, with HTTPS adding encryption.
SNMP (Simple Network Management Protocol)
A protocol for monitoring and managing network devices like routers, switches, servers, and printers remotely.
Load Balancer
A device or software that distributes network traffic across multiple servers to ensure reliability and performance.
ICMP (Internet Control Message Protocol)
A network protocol used for diagnostic and error reporting, including ping and traceroute functionality.
Overlay Network
A virtual network built on top of an existing physical network, enabling features like container networking and VPNs.
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