the wiki article says that twisting the wires protects them from external electromagnetic interference. But then why would you need to go for shielded twisted pair wiring ? Anyway the twist in the wires provide the sheilding.
I understand how sliding window protocol makes the network reliable. But how can it control the flow of data?
Receiver is A , and sender is B
The receiver sets the window size to 1000, and B sends segments.
Assume that segment 500 to 521 is lost.
Then receiver A would send an ack of 501 to the sender. Once the sender receives the ack of 501 it will then start sending segments 501 to 1000 again.
Does the sender send all 501 upto 1000 without expecting a acknowledgement in the middle?
Possible Duplicate:
What is the DNS root zone and domain?
according to what i have understood so far a root dns servers responds to top level domain name resolution requests. Am i correct ?
And why is it that there are only 13 root servers ?