Final answer:
Traffic intensity in a TCP/IP computer network is a measure of the data packet flow relative to the network's capacity. The traffic intensity calculated for the system in question is 0.004, which is less than 1, indicating a stable system that is not at risk of congestion under the current load.
Step-by-step explanation:
Traffic intensity in a TCP/IP computer network refers to the measure of data packets traversing a network compared to the network's capacity to handle those packets. It is a crucial concept when analyzing the performance and stability of network systems. To determine if the system mentioned in the question is stable, we calculate the traffic intensity using the formula Traffic Intensity (A) = (packets per second * packet size in bits) / link capacity in bits per second. Given that the entry router receives 100 packets per second, with each packet being 500 bytes (which is equivalent to 4000 bits since 1 byte = 8 bits), and the link capacity is 100 Mbits (100,000,000 bits per second), we calculate the traffic intensity as follows:
A = (100 packets/s * 4000 bits/packet) / 100,000,000 bits/s = 400,000 bits/s / 100,000,000 bits/s = 0.004.
Because the traffic intensity of 0.004 is less than 1, this indicates that the router is receiving less data than its capacity can handle, thus the system is stable, and not at risk of congestion under the current load.