4.03-2. Network Address Translation (b). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point B?
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- Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at: Points A, B, and C.Suppose within your web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that three DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTT = 4 msecs. The second and third DNS servers contacted have RTTs of 45 and 24 msecs, respectively. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP = 9 msecs. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? (Do not forget the TCP handshake(s).) 82 msecs O 91 msecs O 46 msecs O 67 msecsLet IP address 200.210.56.76/28 find the subnet mask, subnet id broadcast address and also find total number of subnet and total number of host in subnet. And explain Remote monitoring with neat diagram.
- The maximum transmission unit on an Ethernet link is 4500 bytes. This means that the IP packets sent over Ethernet cannot be larger than 4500 bytes including the IP header. Suppose the application layer sends a 6500-byte message. The transport layer uses TCP with no options. The network layer is using IP version 4. Obviously, the IP layer will have to fragment the data. Provide the length of new datagrams (after fragmentation). Provide the Flag and offset of each of the new datagrams.4. The original HTTP protocol used TCP/IP as the underlying protocol. For each page, graphic, or applet, a separate TCP connection was constructed, used, and terminated. This caused several problems: one referred to as the elephant and mice problem and two aspects of connection overhead. Describe both problems. Why were separate connections used? Would UDP rather than TCP be a good alternative? What solution would you propose to these problems to improve HTTP performance?Refer to the exhibit. There are 3 LAN networks in the diagram. The network address given is 192.168.1.0/24. Your task is to do subnetting to support 62 hosts for each network.
- B. Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that two DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTTO = 5 msecs. The second DNS server contacted has an RTT of 8 msecs. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP=63 msecs. 1. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? 2. Suppose the HTML object references 4 very small objects on the same web server. Neglecting transmission times, how much time elapses from when the client…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. 77-34-F1 EF-14-72 128,119,97,18 A (1) 68-01-BC-58-AF-24 128,119,50,107 B 49-FA-B0-3C-E2-7C 128,119,50,60 72-9E-40-31-9C-42 128.119.240.15 CC-A5-81-08-AF-33 128,119.97.194 40-00-A0-74-06-1F 128,119,240,52 (5) C D5-AO-EE-9A-73-06 128.119.240.116 A. What is the source/destination network- or link-layer address at the location (3)? B. What is the source/destination network- or link-layer address at the location (4)? C. What is the source/destination network- or link-layer address at the location (5)? Consider an IP datagram being sent from node A to node C. D. What is the source/destination network- or link-layer address at the location (2)? E. What is the source/destination network- or link-layer address at the location (4)? F. What is the source/destination network- or link-layer address at the…4.03-2. Network Address Translation (b). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point B? [Note: You can find more examples of problems similar to this here.] S: D: B S: D NAT translation table WAN side addr 138.76.29.7, 5051 138.76.29.7 The source IP address is: The destination IP address is: The source port number is: The destination port number is: LAN side addr 10.0.0.1, 2020 10.0.0.4 S D: 10.0.0.1 138.76.29.7 2020 S: D: 5051 A D 10.0.0.1 10.0.0.2 10.0.0.3
- Consider a home network connected to the Internet through a single home router that supports the Network Address Translation (NAT) protocol. The ISP is only providing a single public IP address to the owner of this network (82.7.30.73). Let us assume that one of the connected home devices with IP address 192.168.0.1 has an open connection from source port 30000 to a web server with IP address 172.217.169.4. The source IP and port of the incoming TCP segments that the web server sees could be: 192.168.0.1, 30000 82.7.30.73, 5555 192.168.0.1, 5555 172.217.169.4, 80Question 6 Consider the case when two end hosts communicate remotely, through multiple intermediate network hops. What is a routing table in that context? Select all statements below that are correct. O A data structure that does not contain any addresses / portions of addresses. O A data structure containing transport-layer addresses (e.g. TCP/UDP port numbers) and no IP addresses (no Network IDs). O Information the router's CPU uses to select the best path between the remote hosts.If we have the network-ID of subnet 127.91.220.100 And as shown in the picture we need to plan network , Rt-A = 2100 hosts , Rt-B= 1000 hosts, Rt-C= 300 hosts, Rt-D = 600 hosts. NOTE: It is possible to allocate more than one subnet per interface. Create a table for each of the eight networks that contains the network-ID and subnet mask for the subnet/subnets in that network.