Generic Routing Encapsulation (GRE) is a protocol which encapsulates packets in order to ROUTE other protocols over IP networks.

GRE places a wrapper around a packet during transmission of the DATA. After receiving, GRE removes the wrapper and enables the ORIGINAL packet for processing by the receiving stack.

Following are the ADVANTAGES of GRE tunnels:

1. The tunnels connect discontinuous sub-networks.

2. It allows VPNs across wide area networks (WANS).

3. It encases multiple protocols over a single-protocol backbone.

4. The tunnels provide workarounds for networks with limited hops.

Generic Routing Encapsulation (GRE) is a protocol which encapsulates packets in order to route other protocols over IP networks.

GRE places a wrapper around a packet during transmission of the data. After receiving, GRE removes the wrapper and enables the original packet for processing by the receiving stack.

Following are the Advantages of GRE tunnels:

1. The tunnels connect discontinuous sub-networks.

2. It allows VPNs across wide area networks (WANs).

3. It encases multiple protocols over a single-protocol backbone.

4. The tunnels provide workarounds for networks with limited hops.