What is TTL in networking?
TTL stands for Time to Live. It's a value in networking that determines how long a packet is allowed to exist in a network before being discarded.
Why is TTL important?
TTL is important because it helps prevent packets from circulating indefinitely in the network, which can lead to congestion and inefficiency.
How is TTL set in a packet?
TTL is set in the packet header by the sender. Each time the packet is forwarded by a router, the TTL value is decremented by one.
What happens when TTL reaches zero?
When TTL reaches zero, the packet is discarded, and an ICMP 'Time Exceeded' message may be sent back to the sender.
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