22. Edge Cases

ND0063 C1 L1 17 Edge Case- [#1] Video

AWS networking does have some limitations that your own data center network would not.

  • You cannot use multicast in a VPC
  • You cannot put network cards into "promiscuous" mode to sniff ethernet packets.
  • There are some restrictions on opening up ports for SMTP
  • You cannot have network scans run against your account without discussing with AWS

You can connect VPCs together to enable:

  • Cross VPC connections
  • Cross region connections
  • Cross account connections

Intuition

Which do you think are possible with a VPC?

SOLUTION:
  • Creating a permanent connection to an existing datacenter
  • Connecting two of your VPCs
  • Connecting two VPCs in different regions
  • Connecting two VPCs in different AWS accounts

Knowledge

How many total Availability Zones does AWS have?

SOLUTION: Around 75