What methods can be used to ensure access from one network to another?

Access from one network to another can be provided by the following methods:

• Routing: configuring routers that direct traffic between networks based on IP addresses.
• VPN (Virtual Private Network): creating a secure channel between networks over the internet, allowing safe data exchange.
• Firewalls with access rules: setting rules that permit or deny traffic between networks.
• NAT (Network Address Translation): translating addresses for access from one network to another, often used when connecting to the internet.
• Tunneling (e.g., GRE, IPsec): creating a logical channel for data transmission between networks.

Example: to connect an office with a remote branch, VPN is often used to ensure secure access to internal resources.