Things to Remember:
1 Mbit link Each user l Kbps when "active" l
active 10% of tie Circuit Switching 10 users Packet switching with 35 users, probability >10 active less than 0.0004 Packet switching is not without its disadvantages, however. We will see that each packet or message must carry, in addition to the data being sent from the sending application to the receiving application, an amount of control information. This information, which is carried in the packet or message header, might include the identity of the sender and receiver and a packet or message identifier (for example, number. Since the amount of header information would be approximately the same fora message or a packet, the amount of header overhead per byte of data is higher for packet switching than for message switching.
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