7) For application P4, the packet going to the server, what is the source port in the following packet?

a 6428

b 80

c 9157

d 1022

e 5775

f none of the above

DatagramSocket mySocket2 = new DatagramSocket (9157); DatagramSocket mySocket2 = new DatagramSocket (6428); DatagramSocket mySocket2 = new DatagramSocket (5775); Application Application Application P3 P1 P4 Transport Transpoft Transport Network Network Network Link Link Link Physical Physical Physical Source Port: ? Source Port: 6428 Dest Port: ? Dest Port: 9157 Source Port: 9157 Dest Port: 6428 Source Port: ? Dest Port