$(10$ pts$)$ Suppose four large ftp file transfers are established over a $6$ Mbps WAN link. The only connections over this link are these four ftp sessions. The transmissions of the files start at the same time.

What approximate transmission rate will be given to each connection?

$$

Ans: If the $6$ Mbps WAN link is shared equally among the four FTP file transfers, each connection will receive an equal share of the total bandwidth.

$$

The transmission rate per connection is calculated as follows:

$$

Transmission$$Rate$$per$$Connection $=$ Number$$of$$Connections$/$Total$$Bandwidth

$$Transmission$$Rate$$per$$Connection $=6$Mbps$/4=1\mathrm{.}5$Mbps

$$

So$,$ each connection will approximately have a transmission rate of $1\mathrm{.}5$ Mbps

$$

Now suppose there are two ftp file streams between two different clients and two different servers established at the same exact time over the same link. One stream is using a $1460$ byte segment size the other a $576$ byte segment size. Assume there are no drops and both streams are using a standard TCP and IP header. Assume both ftp streams are copying the same $3$ MiB file $($using the binary MB unit$).$

$$

How many segments will be generated by the stream that is using the $1460$ byte segment size?

How many bytes of the file will be in the last segment?

How many segments will be generated by the stream that is using the $576$ byte segment size?

How many bytes of the file will be in the last segment of the second