6.4-11 Network- and Link-layer addressing: an end-to-end-scenario (3b). 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 C to node A (note: from right to left). Match the source/destination network- or link-layer address at the location (3) by choosing a value from the pulldown list. 77-34-F1-EF-14-72 128.119.97.18 A (6) 68-01-BC-58-AF-24 128.119.50.107 (5) What is the source IP address of the datagram at point (3)? CC-A5 128.1 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 destination IP address of the datagram at point (3)? [Choose ] The MAC address of the switch immediately right of location (3). 128.119.97.194 128.119.240.15 72-9E-4A-31-9C-42 CC-A5-81-OB-AE-33 128.119.97.18 128.119.240.52 77-34-F1-EF-14-72 4C-9D-AA-74-D6-1F [Choose ] 49-FA-BO-3C-E2-7C 128.119.50.60 [Choose ] [Choose ] [Choose ] 4C-9D-AA-74-D6-1F 128.119.240.52 ›>

Consider an Infrastructure BSS with an Access Point and two Mobile Stations, and let’s use AP, M1, and M2 to denote their MAC addresses. Both M1 and M2 are associated with the AP. Suppose M1 wants to send a data frame to M2. When this data frame is relayed by the AP, explain how the AP shall update the four address fields of the data frame.

2. The following illustration shows a transmission from Host A to Host B using Network Address Translation (NAT). Host A is located inside a Local Area Network (LAN) with an IP address of 192.168.1.2. The LAN is connected to the Wide Area Network (WAN), i.e. the Internet, through a router R1 that conducts NAT. R1 has two interfaces with an internal LAN IP address (192.168.1.1) and and external WAN IP address (127.45.10.35). Host B is located outside the LAN and is a well-known server, e.g., Google's server. Host B has an IP address of 130.160.23.45. Port numbers for the application components running at both hosts are provided in the figure. For a single message M1 being sent from Host A to Host B, please fill in the blanks in the illustration below with the source IP address and Port number at Host A and at the Router R1. Any information not provided may be assumed, however, please state your assumption clearly. Host A Local Area Network (LAN) IP: 192.168.1.2 Port: 5252 Source IP…

2. For each of the following, write the ONE correct answer. a) TCP/IP layers are Internet (I), Transport (T), Application (A), Physical (P), Network Interface (N). Which layer deals with modulation in WiFi networks? The layer whose header contains the source MAC address is Answer= Answer= b) The leftmost and rightmost bits in a byte are MSbit and LSbit respectively. For the 2 bytes 10000000 00000001, assume that the first byte is MSbyte and the second byte is LSByte. Assuming that bits are transmitted from left to right, write the transmission order that is bit big endian and byte little endian: Answer= c) Let TP=unshielded twisted pair, CC=coaxial cable, F=fiber, L=lasercommunication. Which of these media Uses a shield for limiting interference Achieves the highest bandwidth across long distances Answer= Answer= d) Of FDMA, CDMA, TDMA and SM (statistical multiplexing), which method is multiplexing primarily based on in LTE networks? Answer= e) Which particular form of FDM is used over…

Network & Data Communications

Help please. I will like if it is correct . otherwise thumb's down