"netstat -rn" - What do the fields mean?

[CyberCowboy]

here's some output from the command netstat -rn:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.0.1.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0


i know what destination, Gateway, genmask, flags, and iface mean.

What do the MSS, Window, and irtt fields mean?
And what are they for?

 

[Peetoeng]

Originally posted by: CyberCowboy
here's some output from the command netstat -rn:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.0.1.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0


i know what destination, Gateway, genmask, flags, and iface mean.

What do the MSS, Window, and irtt fields mean?
And what are they for?

my guess would be:
window = the size of packet that can be transmitted (receiver tell transmitter that it can only receive packet of certain size not larger, something like that).
irtt = probably some kind of time to live (timed out setting)
Iface = interface (ethernet device name)