CPEG$-572$ Assignment #$2$

$1.$ Imagine the length of a $10$Base$5$ cable is $2500$ meters. If the speed of propagation in a thick

coaxial cable is $200,000,000$ meters per second, how long does it take for a bit to travel from the

beginning to the end of the network? Ignore any propagation delay in the equipment.

Then find the maximum time it takes to sense a collision. The worst case occurs when data are

sent from one end of the cable and the collision happens at the other end $.$ Remember that the

signal needs to make around the trip.

$2.$ The data rate of $10$Base$5$ is $10$ Mbps$.$ How long does it take to create the smallest frame?

Assume that the minimum frame size is $65$ bytes or $520$ bits. Show your calculation.

If in the worst case, the collision would be sensed in $25$ microseconds, Find the minimum size of

an Ethernet frame for collision detection to work properly.

$3.$ An Ethernet MAC sublayer receives $42$ bytes of data from the LLC sublayer. How many bytes of

padding must be added to the data?

$4.$ An Ethernet MAC sublayer receives $1510$ bytes of data from the LLC layer. Can the data be

encapsulated in one frame? If not, how many frames need to be sent? What is the size of the

data in each frame?