DNS timeout and retransmission mechanisms for different browsers (I)

I. Chrome browser (37.0.2062.124 m)

1. In win7, the time interval for re-sending of DNS timeout is: 2 S, 2 S, 2 S, and 2 S (two DNS requests are repeatedly sent at this time), 2 S, 4 s, and after about 14 S, resend another round at the above interval.

When there are two DNS servers, for example:

2. Firefox (32.0.3.5379)

1. In win7, the time interval for re-sending of DNS timeout is: 2 S, 2 S, and 4 s.

When there are two DNS servers:

2. In the Ubuntu-12.04 environment, the DNS timeout interval is 5 S and 16 times.

When the DNS server is configured as two, the time interval is still 5 S. The two servers Round Robin and repeat 32 times, for example:

Iii. IE browser (9.0.811385421)

In win7, the DNS timeout interval is 2 S, 2 S, 4 s, 4 S, 2 S, 2 S, and 4 s.

When there are two DNS servers, for example:

4. Cheetah browser (v5.0.64.8709)

In win7, the timeout and re-transmission mechanisms of DNS are as follows: 2 S, 2 S, 2 S (two duplicate DNS requests at this time point), 2 S, and 2 s, 2 S (two DNS requests are repeatedly sent at this time point), 2 S, 2 S, and 2 S (two more requests at this time point), 2 S, 4 s.

When there are two DNS servers, for example:

V. Window of the world browser (6.2.0.128)

In win7, the time interval for re-sending of DNS timeout is 2 s, 2 S, 2 S, and 2 S (two DNS requests are repeatedly sent at this time), 2 S, 4 s.

When there are two DNS servers, for example:

DNS timeout and retransmission mechanisms for different browsers (I)