Suppose a node has a CPU with 1GHz clock and an one's complement addition of two 16-bit numbers can be done in one clock cycle. Consider all packets have the size of 1500 bytes that include all overhead. How much time does it take for the CPU to process a packet for error detection with Internet checksum over the whole packet? Now we also assume that the node has an outgoing link with the capacity of 100Gbps. How much is the transmission time for a packet? Which part is the bottleneck of the node?