Answer the following questions, please be clear, concise, and use your own words with a maximum of 4 lines for each answer

Part V: Answer the following questions, please be clear, concise, and use your own words with a maximum of 4 lines for each answer (out of 24): [ 4 points each ] 1. What will happen if the default gateway address is incorrectly configured on a host? The PC will can't communicate with the other PCs in other networks and also he can't communicate with the router 2. What problem is poisoned reverse trying to solve? 3. Does UDP require a mechanism to estimate the RTT between sender and receiver? Briefly explain your answer. 4. What will a layer 2 switch do when the destination MAC address of a received frame is in the MAC table? 5. If an institution needs 300 different IP addresses without using NAT, which of the following subnet masks best fit: /8,/9,/23,/24, /25? Explain your