Quiz 7 May 14, 2015 Computer Engineering 80N Left Neighbor: Right Neighbor: Keep this side up on your desk until you are told to turn the page over. This is a closed book quiz. No calculators.
First Name Last Name CE 80N Quiz 7, May 14, 2015 Laptop #1 Laptop #2 Laptop #3 Router #1 Router #2 110.0.0.1 110.0.0.2 120.0.0.1 120.0.0.2 120.0.0.3 130.0.0.1 130.0.0.2 11-11 11-22 11-33 11-44 11-55 11-66 11-77 110.0.0.0 / 24 120.0.0.0 / 24 130.0.0.0 / 24 The default gateway of Laptop #1 is Router #1. The default gateway of Laptop #2 is Router #2. The default gateway of Laptop #3 is Router #2. All routers have properly configured routing tables. 1. (2 points) Which command do you type on Laptop #2 to check that it can communicate with Laptop #3? ipconfig /all ping 120.0.0.3 ping 140.0.0.4 ping 170.0.0.7 ping /all ping 130.0.0.2 ping 160.0.0.5 ping 180.0.0.7 2. (3 points) Laptop #1 prepares to send an IP datagram to Laptop #3, but Laptop #1 s ARP cache is empty, and so it broadcasts an ARP request. Then subsequently it receives an ARP reply. (a) Which IP address does Laptop #1 send in the ARP request?... (b) Which MAC address does Laptop #1 receive in the ARP reply? 3. (4 points) It takes two packets to send data from Laptop #2 to Laptop #3. Fill in their addresses. 4. (1 point) It takes three packets for Laptop #2 to send data to Laptop #1. Fill in their address fields. (Yes, three packets. Remember how default gateways are used.)
Quiz 7 May 14, 2015 Computer Engineering 80N Left Neighbor: Right Neighbor: Keep this side up on your desk until you are told to turn the page over. This is a closed book quiz. No calculators.
First Name Last Name CE 80N Quiz 7, May 14, 2015 Laptop B Laptop C Laptop A Router #1 Router #2 150.0.0.3 105.0.0.4 160.0.0.3 160.0.0.4 160.0.0.5 140.0.0.3 140.0.0.4 33-11 33-22 33-33 33-44 33-55 33-66 33-77 150.0.0.0 / 24 160.0.0.0 / 24 140.0.0.0 / 24 The default gateway of Laptop B is Router #1. The default gateway of Laptop C is Router #2. The default gateway of Laptop A is Router #2. All routers have properly configured routing tables. 1. (2 points) Which command do you type on Laptop C to check that it can communicate with Laptop A? ipconfig /all ping 120.0.0.3 ping 140.0.0.4 ping 170.0.0.7 ping /all ping 130.0.0.2 ping 160.0.0.5 ping 180.0.0.7 2. (3 points) Laptop B prepares to send an IP datagram to Laptop A, but Laptop B s ARP cache is empty, and so it broadcasts an ARP request. Then subsequently it receives an ARP reply. (a) Which IP address does Laptop B send in the ARP request?... (b) Which MAC address does Laptop B receive in the ARP reply? 3. (4 points) It takes two packets to send data from Laptop C to Laptop A. Fill in their addresses. 4. (1 point) It takes three packets for Laptop C to send data to Laptop B. Fill in their address fields. (Yes, three packets. Remember how default gateways are used.)
Quiz 7 May 14, 2015 Computer Engineering 80N Left Neighbor: Right Neighbor: Keep this side up on your desk until you are told to turn the page over. This is a closed book quiz. No calculators.
First Name Last Name CE 80N Quiz 7, May 14, 2015 Laptop Z Laptop Y Laptop X Router #1 Router #2 190.0.0.8 190.0.0.7 180.0.0.9 180.0.0.8 180.0.0.7 170.0.0.8 170.0.0.7 55-77 55-66 55-55 55-44 55-33 55-22 55-11 190.0.0.0 / 24 180.0.0.0 / 24 170.0.0.0 / 24 The default gateway of Laptop Z is Router #1. The default gateway of Laptop Y is Router #2. The default gateway of Laptop X is Router #2. All routers have properly configured routing tables. 1. (2 points) Which command do you type on Laptop Y to check that it can communicate with Laptop X? ipconfig /all ping 120.0.0.3 ping 140.0.0.4 ping 170.0.0.7 ping /all ping 130.0.0.2 ping 160.0.0.5 ping 180.0.0.7 2. (3 points) Laptop Z prepares to send an IP datagram to Laptop X, but Laptop Z s ARP cache is empty, and so it broadcasts an ARP request. Then subsequently it receives an ARP reply. (a) Which IP address does Laptop Z send in the ARP request?... (b) Which MAC address does Laptop Z receive in the ARP reply? 3. (4 points) It takes two packets to send data from Laptop Y to Laptop X. Fill in their addresses. 4. (1 point) It takes three packets for Laptop Y to send data to Laptop Z. Fill in their address fields. (Yes, three packets. Remember how default gateways are used.)