83) How many cross points are needed in a single-stage switch with 40 inputs and 50 outputs ?

84) In a time - division switch, which governs the destination of a packet stored in RAM

85) The number of cross-points needed for 10 lines in a cross-point switch which is full duplex in nature and there are no self connection, is

86) A group of 2m- 1 routers are interconnected in a centralized binary tree. With router at each tree node. Router I communicates with router J by sending a message to the root of the tree. If root then sends the message back down J, the mean path length will be

87) A circuit switching network has the following characteristics :
Set up time = 5 sec
Propagation = 5 sec
Message size = 1 M bits
Data transmission rate = 1 M bits
Data transmission rate = 1
Kbps Number of hops = 10
When will the last bit of the message reach the receiver ?