How many different headers are defined to be used by GRE when configuring a tunnel?
A) 3
B) 0
C) 1
D) 2
D
Explanation: D) GRE specifies the use of two headers to create the tunnel: the GRE header itself, which is used to manage the tunnel itself; and another header (referred to as the delivery header), which is used for IP addressing on the unsecure network.
Computer Science & Information Technology
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