CS$331$: Data Communication and Networking

Assignment $1$

Cite one advantage and one disadvantage of each topology.

For $n$ devices in a network, what is the number of cable links required for a mesh, ring, bus, and star topology?

What is a hybrid topology? Draw a hybrid topology with a star backbone and three ring networks for a multi$-$office LAN.

You have two computers connected by an Ethernet hub at home. Is this a LAN, a MAN, or a WAN? Explain your reason.

Draw a MAN for a two$-$office company in Riyadh.

Draw a WAN for a two$-$office company; one in Riyadh and another one in Dubai. Consider point to point WAN.

Why are protocols needed?

State one service for each OSI model layer.

What is the difference between the physical and logical connections in the TCP$/$IP model?

Computer A sends a message to computer D via LAN$1,$ router R$1,$ and LAN$2.$

a$)$ Show the contents of the packets and frames at the network and data link layer for each hop interface.

b$)$ Assume that the communication is between a process running at computer A with port address i and a process running at computer $D$ with port address $j.$ Show the contents of packets and frames at the network, data link, and transport layer for each hop.