题目

INTRO TO COMPUTER NETWORKS (CS_372_400_U2025) Module 3 Summary Exercises

多重下拉选择题

Server X is running Diablo II services on port #4000. Client A is running an application that uses port #450 to request an Diablo II TCP connection to Server X. Client B is running an application that uses port #455 to request an Diablo II TCP connection to Server X. IP addresses: Server X: 152.111.20.36 Client A: 113.13.131.10 Client B: 114.192.111.23 Client A starts a second application (running at the same time as the first application) that uses the next incremental port number to request an Diablo II TCP connection to Server X. The connection created for Client A is identified by the sockets at the endpoints as follows: IP address and port socket identifier Destination IP Address Destination Port Number On Client A 152.111.20.36 [ Select ] 114.192.111.23 455 152.111.20.36 456 113.13.131.10 4000 451 450 On Server X [ Select ] 114.192.111.23 113.13.131.10 4000 450 152.111.20.36 455 456 451 [ Select ] 4000 455 450 451 113.13.131.10 152.111.20.36 456 114.192.111.23

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标准答案

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思路分析

We need to map the network connection between Client A and Server X for the second Diablo II TCP connection that Client A initiates using the next incremental port after 450. First, recall the key endpoints involved in a TCP connection: - Client A has IP 113.13.131.10 and, for the second connection, uses port 451 as the source port. - Server X has IP 152.111.20.36 and listens on port 4000 for Diablo II TCP connections. - The destination (server) in this connection is thus 152.111.20.36:4000, and the client’s source address is 113.13.131.10:451. Option-by-option reasoning: - Client A: Destination IP Address field The destination IP address that Client A is targeting for the TCP connection is t......Login to view full explanation