assumptions: avg object size:1 Mbits avg request rate from browsers to origin servers: 999/sec access link rate: 1 Gbps Cache hit rate = 67% Find: Without local web cache access link utilization = 99.9% With local web cache access link utilization = 33.3% Without local web cache What is the delay on the access link? The delay is calculated as /(1-y) where x is the time to send one object over the link and y is the link utilization. average time to send one object = 0.001s 1-y = 0.001 delay on access link = ls