VPNs

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Useful Links:
- AWS VPN Solutions
Exam Tips:
- When to use a VPN.
- Know the architecture.
  - BGP required for dual vpn tunnels.
- Can be done in minutes.
  - As opposed to direct-connect.
- Per hour cost.
- Data cost for outbound data.
- Generally limited by CGW.
- Encrypted.
- Performance is variable.
- Route Table Priorities
  - (1.) Local route.
  - (2.) Static routes.
  - (3.) Direct Connect routes learned from BGP.
  - (4.) Statically configured VPN route.
  - (5.) VPN routes learned from BPG.
- Quick to set up (possibly under an hour)
- Virtual Private Gateway:
  - Actually physical
- Max throughput of ~ 1.25Gbps
- Latency considerations - inconsistent, public internet.
- Hourly cost, GB out cost, data cap (on premises).
- Can be used as a backup for Direct Connect.
- Can be used on top of Direct Connect for security, providing encryption.