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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

Port
A numbered endpoint (0-65535) that identifies specific processes or services on a networked computer for communication.
Traceroute
A network diagnostic tool that shows the path packets take from source to destination, listing each hop along the way.
Network ACL
A set of rules that control inbound and outbound traffic at the subnet level, acting as a stateless firewall in cloud and enterprise networks.
VLAN (Virtual LAN)
A logical grouping of network devices that creates separate broadcast domains on the same physical network infrastructure.
Firewall
A network security system that monitors and controls incoming and outgoing traffic based on predetermined rules.
Network Packet
A formatted unit of data carried over a network, containing headers with routing information and a payload with the actual data.
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