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Updated Frequently Asked Questions (markdown)

dswd 2016-08-25 11:35:11 +02:00
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Frequently-Asked-Questions.md

@ -53,9 +53,10 @@ All the rest is about how VpnCloud decides where packets/frames should be sent t
#### How much overhead do VpnCloud headers add? #### How much overhead do VpnCloud headers add?
VpnCloud has a fixed 8-byte header. If encryption is used, another 12-byte header is added. As VpnCloud packets are transported over UDP, you have to add the UDP header (8 bytes), an IP header (20 bytes for IPv4 and 40 bytes for IPv6) and an Ethernet header (14 bytes). VpnCloud has a fixed 8-byte header. If encryption is used, another 12-byte header is added. As VpnCloud packets are transported over UDP, you have to add the UDP header (8 bytes), an IP header (20 bytes for IPv4 and 40 bytes for IPv6) and an Ethernet header (14 bytes) for TAP devices.
So the total overhead is: So the total overhead is:
- 50 bytes if unencrypted and IPv4 - 50 bytes if unencrypted and IPv4
- minus 14 bytes for TUN devices
- plus 12 bytes for encryption - plus 12 bytes for encryption
- plus 20 bytes for IPv6 - plus 20 bytes for IPv6