Figure 1 shows four LANs connected by two source routing bridges. LAN numbers and bridge numbers are shown in the figure. a) How do the computers on the network learn the addresses of other computers in the network? Explain briefly. Write the name of the frame that is send using the flooding method to learn the addresses of the computers on the LANs. What name is given to this type of learning? (5 p.) b) Write the name of the problem which may arise when computers use the flooding method to learn the addresses of the other computers in a network where the LANs are connected with parallel bridges. (4 p.) c) Suppose that computer A has learnt and registered the address of computer H. Write the route definition from computer A to computer H by using the LAN numbers and bridge numbers. (4 p.) 000 H Bridge 1 LAN 4 Bridge 2 B2 B1 A B B D E F LAN 1 LAN 3 LAN 2 Figure 1