Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
- Differentiated Services
- Fragment Offset
- Header Length
- Time-to-Live
| Explanation & Hint:
The value that is contained in an IPv4 header field and is decremented by each router that receives a packet is the Time-to-Live (TTL). This field is used to avoid a situation where an undeliverable packet circulates indefinitely. The TTL field is set by the sender of the packet and is decreased by one by each router that forwards the packet. When the TTL field reaches zero, the packet is discarded. This mechanism helps to ensure that packets do not loop endlessly due to routing errors. |