Match the following:
i. PSTN a. Virtual Switching
ii. X.25 b. Message Switching
iii. Internet c. Circuit Switching
iv. Frame Relay d. Datagram Switching
Match for i , ii , iii, iv respectively is:
1
a b c d
2
d c a b
3
c d a b
4
b c d a
5
c a d b