a$)$ An engineer is working on a movie file on his local machine. The movie is composed of a

sequence of $30$ frames per second. Each frame is composed of $2000*1000$ pixels, $32$ bits per pixel

and the clip is $5$ minutes long. He needs to send it to his manager over their local $100Mbps$ LAN.

Assume negligible propagation, processing and queuing delay,

i$.$ Calculate how long will it take to transmit the clip.

ii$.$ This engineer is tired from his slow network and dreams of being able to take a $10$ minutes

break and have the file transfer completed by the time he gets back from his break. How fast

would the network needs to be to make his dream come true?

b$)$ Consider sending a $1500-$byte datagram into a link that has an MTU of $510$ bytes. Assume that

IPv$4$ is used $($IPv$4$ header is $20$bytes long$).$ Answer the following questions:

i$.$ Where does fragmentation happen? Where are the fragments reassembled?

ii$.$ How many fragments are generated?

c$)$ Compare and contrast the IPv$4$ and the IPv$6$ header fields. Do they have any fields in common?

$[2$ marks$]$

d$)$ The following network is composed of four LANS: LAN $1,$ LAN $2,$ LAN $3,$ and LAN $4.$ The network

addresses is class C network address $193\mathrm{.}115\mathrm{.}52.$x Determine:

$[4$ marks$]$

i$.$ Network address for each LAN.

ii$.$ The IP address for all the hosts in the figure.

iii. The maximum number of hosts that can be connected to every LAN and the range of the IP

addressesthat can be given.