Problem 2- Consider a switch S with four hosts A, B, C, D attached to it. A is attached to port 0, B to port 1, C to port 2, and D to port 3. The switch has just been turned on, so its forwarding table is empty. The switch now sees now sees the following traffic in the given order:

Frame from A to C.

Frame from C to A.

Frame from B to A.

Frame from B to D

Frame from A to B.

Show the forwarding table of the switch immediately after each frame is seen, and indicate if the frame is flooded (sent out on all ports except the port of arrival) or unicast (sent out over just one port).

Problem 3- The following row-column parity matrix is received (assume even parity is used):

Column

0 1 2 3 4

--------------

0| 1 0 1 1 1

1| 0 0 1 0 0

Row 2| 1 1 0 1 1

3| 0 0 0 0 0

Which bit is in error ? Explain.

Problem 4- Consider the following network: A ------- R1 -------- R2 ------ B.

Host A IP Address: 192.168.1.10

Host A MAC Address of its interface: 00-11-22-33-44-55

Router R1 IP address of left interface: 192.168.1.1

Router R1 MAC Address of left interface: aa-bb-cc-dd-ee-ff

Host B IP address: 10.1.1.1

Host B MAC Address of its interface: 22-33-44-55-66-77

Host A sends an IP datagram to Host B. The datagram is encapsulated inside an Ethernet frame and sent to router R1. What source MAC address and destination MAC address will A put in the header of the Ethernet frame? What source IP address and destination IP address will A put in the header of the IP datagram?