# Recent questions tagged packet-switching

1
Suppose end system A wants to send a large file to end system B. At a very high level, describe how end system A creates packets from the file. When one of these packets arrives at a packet switch, what information in the packet does the switch use to ... packet is forwarded? Why is packet switching on the Internet analogous to driving from one city to another and asking directions along the way?
Suppose that $x$ bits of user data are to be transmitted over $k-$hop path in a packet-switched network as a series of packets each containing $p$ data bits and $h$ header bits with $x>>(p+h)$. The bit rate of lines is $b$ bps and propagation delay is negligible.What is the time taken ... $(p+h)x/pb \hspace{0.1cm} bits$ $px/b \hspace{0.1cm} bits$ $hx/pb \hspace{0.1cm} bits$