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netstat -s tcp항목 retransmit timeouts 질문 입니다

 
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netstat -s tcp항목 retransmit timeouts 질문 입니다

안녕하세요.

#>netstat -s 할 경우 결과물이...

tcp 항목중에..

tcp:

89172 packets sent

79384 data packets (86727768 bytes)

16 data packets (6870 bytes) retransmitted

9553 ack-only packets (5954 delayed)

0 URG only packets

0 window probe packets

0 window update packets

8249 control packets

76281 packets received

61683 acks (for 86722612 bytes)

3 duplicate acks

0 acks for unsent data

21010 packets (10378651 bytes) received in-sequence

0 completely duplicate packets (0 bytes)

0 packets with some dup data (0 bytes duped)

0 out of order packets (0 bytes)

0 packets (0 bytes) of data after window

0 window probes

3991 window update packets

234 packets received after close

0 segments discarded for bad checksum

0 bad TCP segments dropped due to state change

1775 connection requests

2106 connection accepts

3881 connections established (including accepts)

3863 connections closed (including 19 drops)

12 embryonic connections dropped

58082 segments updated rtt (of 58082 attempts)

11 retransmit timeouts

0 connections dropped by rexmit timeout

0 persist timeouts

34 keepalive timeouts

17 keepalive probes sent

0 connections dropped by keepalive

0 connect requests dropped due to full queue

36 connect requests dropped due to no listener

0 suspect connect requests dropped due to aging

0 suspect connect requests dropped due to rat





=> 11 retransmit timeouts

0 connections dropped by rexmit timeout

0 persist timeouts

34 keepalive timeouts

17 keepalive probes sent

0 connections dropped by keepalive



이 부분이 무슨 의미인지요?

=> retransmit timeouts , keepalive timeouts

이 부분 또한 무슨 의미 인지 궁금합니다.