II 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? 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 answer. 6. According to the following routing table, for each of the fooling IP addresses what does the router do if a packet with that address arrive? ADDRESS / MASK NEXT HOP 135.46.56.0/22 135.46.60.0/25 192.53.40.0/23 DEFAULT Interface 0 Interface 1 Router 1 Router 2 . 135.46.60.130 135.46.57.14 4 135.46.52.2 . 192.53.56.7