A 192.168.1.1 11-11-11-11-11-11 LAN 192.168.1.2 22-22-22-22-22-22 Router 1 192.168.2.2 55-55-55-55-55-55 B 192.168.1.3 33-33-33-33-33-33 C 192.168.2.1 44-44-44-44-44-44 LAN D 192.168.2.4 66-66-66-66-66-66 A. Host B is trying to send an IP datagram to Host A. Assume that Host B's ARP table is empty (ARP query is required). Please fill in the following table with IP or MAC addresses. action\address source IP addr source MAC addr destination IP addr destination MAC addr B sends ARP 192.168.1.2 B 192.168.1.1 query B sends 192.168.1.2 B 192.168.1.1 datagram B. Host B is now sending an IP datagram to Host C. Assume all ARP tables in all hosts are up to date (no ARP query is required). Please fill in the following table with IP or MAC addresses. action\address source IP addr source MAC addr destination IP addr destination MAC addr B sends datagram C receives datagram
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Since Host B's ARP table is empty, it needs to send an ARP query to find the MAC address of Host A. Show more…
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Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C, and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. What is the source MAC address on the frame at point (3)? What is the destination MAC address on the frame at point (3)? What is the source IP address of the datagram at point (3)? What is the destination IP address of the datagram at point (3)? What is the source MAC address on the frame at point (4)? What is the destination MAC address on the frame at point (4)? What is the source IP address of the datagram at point (4)? What is the destination IP address of the datagram at point (4)?
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Problem 1 (10 points): ARP Consider the network setting in the figure below. Node A and node B are both in a LAN behind the NAT. 143.89.160.192/26 A Server 192.168.0.2 Router 00:0A:45:B5:34:53 NAT 220.32.19.34 143.89.160.200 192.168.0.3 04:77:ED:78:00:A0 192.168.0.1 B 00:0A:45:B5:34:55 143.89.160.128/25 a) (5pts) Assume the ARP table of node A is initially empty. Suppose node A wants to send an IP datagram to node B. Fill in the following boxes which represent the corresponding headers of the messages. Use N/A if not applicable. Messages Source MAC Destination MAC Source IP Destination IP ARP request ARP reply IP in Ethernet frame b) (5pts) Show the routing table at Router with entries related to this figure only. Subnet number Subnet Mask Next Hop
Use the following scenario to answer the 10 questions below. You have 3 networks (A, B, and C) and 2 routers (Y and Z). Network A has an address space of 10.1.1.0/24 and is connected to router Y using the interface 10.1.1.1. Network B has an address space of 192.168.1.0/24 and is connected to router Y using the interface 192.168.1.254. Network C has an address space of 172.16.1.0/24 and is connected to router Z using the interface 172.16.1.1. The diagram below represents these connections and interfaces. Router Y Network A Interface: 10.1.1.1 Network B interface: 192.168.1.254 Router Z Network B interface: 192.168.1.1 Network C interface: 172.16.1.1 1. Computer 1 on network B with IP address 192.168.1.233 wants to send a packet to Computer 2 with IP address 10.1.1.205. On which network is computer 2? Network C Network A Network B Not present
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