What is the Linux default TTL value?

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Multiple Choice

What is the Linux default TTL value?

Explanation:
Time-To-Live is the IP header value that limits how many hops a packet can traverse before being discarded. The Linux kernel initializes this as the default initial TTL for new IPv4 packets, and that default is 64. This value works well for most Internet paths: it’s high enough to survive the typical number of routers between source and destination, yet not so large that a misrouted packet would wander endlessly. You can check or change it via the system control interface, for example by reading or setting /proc/sys/net/ipv4/ip_default_ttl or using sysctl. Other common defaults include 128 on Windows; 255 is the maximum that’s rarely used; a value like 32 would expire too quickly on many paths.

Time-To-Live is the IP header value that limits how many hops a packet can traverse before being discarded. The Linux kernel initializes this as the default initial TTL for new IPv4 packets, and that default is 64. This value works well for most Internet paths: it’s high enough to survive the typical number of routers between source and destination, yet not so large that a misrouted packet would wander endlessly. You can check or change it via the system control interface, for example by reading or setting /proc/sys/net/ipv4/ip_default_ttl or using sysctl. Other common defaults include 128 on Windows; 255 is the maximum that’s rarely used; a value like 32 would expire too quickly on many paths.

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