I was pinging one of my workstation and the result of my ping, the ttl is be 64 and the workstation is running windows 8.1? Also i cant access to the PC form DNS name? I want to know why and how i cant fix it? thanks...
Some default ttl values: http://www.netresec.com/?page=Blog&month=2011-11&post=Passive-OS-Fingerprinting
Each device can pick it's ttl up to 255 when sending a ip packet, the recommendation is 64, allowing for 64 layer 3 hops before a packet is dropped.
To double check the number of hops, use traceroute.