VPN
A VPN (Virtual Private Network) creates an encrypted tunnel between a device and a remote network or gateway over the public internet, making traffic appear as if it originates from the VPN endpoint and shielding it from intermediaries. VPNs are used both for secure remote access to private corporate networks and for…
21 resources across 3 libraries
Glossary Terms(8)
Zero Trust
Zero Trust is a security model built on the principle 'never trust, always verify': no user, device, or network location is trusted by default, even inside a t…
VPN
A VPN (Virtual Private Network) creates an encrypted tunnel between a device and a remote network or gateway over the public internet, making traffic appear as…
SSL
SSL (Secure Sockets Layer) is the original cryptographic protocol for encrypting communication between a client and a server over a network, developed by Netsc…
TLS
TLS (Transport Layer Security) is the standard cryptographic protocol for securing data in transit over a network, succeeding SSL. It provides encryption, data…
Authentication
Authentication is the process of verifying that a user, device, or system is who or what it claims to be, typically before granting access to a resource. It is…
Cloud VPN
A cloud VPN is a managed virtual private network service that creates an encrypted tunnel between an on-premises network (or individual user) and a cloud provi…
Virtual Private Network (VPN)
A Virtual Private Network (VPN) creates an encrypted tunnel between a device and a remote network or server, protecting data in transit and allowing the device…
Man-in-the-Middle Attack
A man-in-the-middle (MITM) attack occurs when an attacker secretly intercepts, and potentially alters, communication between two parties who believe they are c…
Cheat Sheets(1)
Interview Questions(12)
What is a VPN?
A VPN (Virtual Private Network) creates an encrypted tunnel between a device and a remote server, so traffic looks like it originates from that server and cann…
What is GRE (Generic Routing Encapsulation)?
GRE (Generic Routing Encapsulation) is a tunneling protocol that wraps one network-layer packet inside another, letting two endpoints carry traffic — including…
What is IPsec and How Does It Secure IP Traffic?
IPsec (Internet Protocol Security) is a suite of protocols that authenticates and encrypts IP packets at the network layer, most commonly used to build VPN tun…
VPN Types Explained: Remote Access vs Site-to-Site
A VPN (Virtual Private Network) creates an encrypted tunnel over an untrusted network like the internet, and the two most common types are remote-access VPNs,…
What is MTU (Maximum Transmission Unit)?
MTU (Maximum Transmission Unit) is the largest size, in bytes, that a single packet can have on a given network link without needing to be split, commonly 1500…
What is RADIUS (Remote Authentication Dial-In User Service)?
RADIUS (Remote Authentication Dial-In User Service) is a client-server networking protocol that centralizes AAA — Authentication, Authorization, and Accounting…
What is a VPN Tunnel?
A VPN tunnel is an encrypted, encapsulated logical connection through which original network packets are wrapped inside new outer packets and carried across an…
Site-to-Site vs Remote-Access VPN: What is the Difference?
A site-to-site VPN permanently connects two whole networks (such as a branch office and a data center) through gateway devices so that every user behind either…
What is WireGuard?
WireGuard is a modern, open-source VPN protocol designed for simplicity, speed, and a minimal attack surface, implemented in only a few thousand lines of code…
What is OpenVPN?
OpenVPN is an open-source VPN protocol and software suite that builds an encrypted tunnel between a client and a server using TLS for key exchange and either O…
What is IPsec vs SSL VPN?
IPsec VPN encrypts traffic at the network layer (Layer 3) using the IPsec protocol suite (IKE for key negotiation, ESP/AH for the actual encryption), typically…
VPN vs VPC Peering: What is the Difference?
A VPN creates an encrypted tunnel over the public internet to connect two networks (such as an on-premises data center and a cloud VPC), while VPC peering dire…