you can use them over both. I use a GRE tunnel from my house to my office to pass my VoIP traffic, whereas I pass my other data traffic through an IPSEC AES tunnel. The GRE tunnel has MUCH LESS overhead/latency than the IPSEC tunnel.
Tunnel as the word suggest is kind of virtual path defined (defined a virtual tunnel) in a shared network.
Now Internet is a shared network and WAN can also be shared network e.g. for diferent offices. So usage depend on need and can be used anywhere be it wan or internet.
In order to use isolate the defined traffic over a shared network you various tunneling techniques.
we can use GRE or IPSEC or both to make tunnel between two gateways, as Brad said , GRE has much less overhead than IPSEC tunnel but GRE only do the encapsulation and it does not provide the data encryption.
One of very frequent use of GRE is where you have to use routing protocols over the tunnel. As IPSEC doesnt support multicast ( most of the protocol talk over multicast) so GRE tunnel is deployed in order to use routing protocol.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...