این اتفاق تقریبا یه چیز عادی در شبکه است .
شما با سیستم هم که یه آدرس رو پینگ میکنی همچین اتفاقی رخ میده .
علتش هم میتونه از :
متعدد بودن مسیر های ارتباطی به سورس مورد نظر
متغیر بودن بار و ترافیک شبکه
متغیر بودن بار و ترافیک سورس مورد نظر
باشه .
نظر شما رو به نمونه زیر که در یک شبکه با پهنای باند 256 کیلو بایت بر ثانیه گرفته شده و در اون لحظه هیچ باری روی شبکه مبدا نبوده جلب میکنم :
کد:
C:\>ping www.yahoo.com
Pinging www.yahoo.akadns.net [68.142.197.66] with 32 bytes of data:
Request timed out.
Reply from 68.142.197.66: bytes=32 time=621ms TTL=46
Reply from 68.142.197.66: bytes=32 time=908ms TTL=46
Reply from 68.142.197.66: bytes=32 time=716ms TTL=46
Ping statistics for 68.142.197.66:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 621ms, Maximum = 908ms, Average = 561ms
C:\>ping www.yahoo.com
Pinging www.yahoo.akadns.net [68.142.197.81] with 32 bytes of data:
Reply from 68.142.197.81: bytes=32 time=677ms TTL=46
Reply from 68.142.197.81: bytes=32 time=627ms TTL=46
Reply from 68.142.197.81: bytes=32 time=651ms TTL=46
Reply from 68.142.197.81: bytes=32 time=569ms TTL=46
Ping statistics for 68.142.197.81:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 569ms, Maximum = 677ms, Average = 631ms
C:\>ping www.yahoo.com
Pinging www.yahoo.akadns.net [68.142.197.81] with 32 bytes of data:
Reply from 68.142.197.81: bytes=32 time=335ms TTL=46
Reply from 68.142.197.81: bytes=32 time=409ms TTL=46
Reply from 68.142.197.81: bytes=32 time=414ms TTL=46
Reply from 68.142.197.81: bytes=32 time=783ms TTL=46
Ping statistics for 68.142.197.81:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 335ms, Maximum = 783ms, Average = 485ms
C:\>