Which TCP setting is tuned to minimize the risk of fragmentation on a GRE/IP tunnel?
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A. B. C. D.A.
When it comes to a GRE/IP tunnel, the Maximum Transmission Unit (MTU) is the TCP setting that needs to be tuned to minimize the risk of fragmentation.
MTU is the maximum size of a packet that can be transmitted over a network. When a packet is larger than the MTU, it needs to be fragmented into smaller packets for transmission. However, fragmentation can lead to increased packet loss and decreased network performance.
In the case of a GRE/IP tunnel, the tunnel adds additional headers to the packet, which increases its size. If the original packet size, plus the added GRE/IP headers, exceed the MTU of any network device along the path between the tunnel endpoints, the packet will need to be fragmented. Fragmentation can be avoided by adjusting the MTU of the network devices to accommodate the additional overhead of the GRE/IP tunnel.
By setting the MTU appropriately, the packet size can be adjusted to fit within the MTU of all network devices along the path of the tunnel, thus avoiding the need for fragmentation. This will help to minimize the risk of packet loss and improve network performance.
Therefore, the correct answer is B. MTU.