The client is communicating with the server to get a reliable service. The server is not...
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The client is communicating with the server to get a reliable service. The server is not using a well-known port number to deliver the service. The client port is allocated by the operating system from the ephemeral range. The figure below shows several packets that are captured from a router that is in between the client and the server. The packets are captured by the Wireshark: 10.000000 192.168.1.11 20.001958 192.168.2.21 3 10.318572 192.168.1.11 410.312391 192.168.2.21 718.864711 192.168.1.11 818.866558 192.168.2.21 918.867934 192.168.1.11 10 22.647931 192.168.1.11 11 22.650171 192.168.2.21 12 25.704045 192.168.1.11 13 25.705027 192.168.2.21 14 28.479390 192.168.1.11 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 0000 08 00 27 84 a7 b1 es ee 0010 00 42 b8 90 40 00 40 06 0020 02 15 c4 da 21 77 42 29 0030 03 91 99 3f ee ee el ei 0040 67 93 74 68 69 73 20 69 74 50390-8567 [SYN] Seq-821837324 Win-29200 Len-0 MSS-1460 SACK_PERM-1 TSval-31 54 8567 50390 (RST, ACK] Seq- Ack-821837325 Win-0 Len-0 Frame 14: 80 bytes on wire (640 bits), 80 bytes captured (640 bits) Ethernet II, Sre: PcsCompu_cb:6e:9a (08:00:27:cb:6e:9a), Dst: PesCompu_84:a7:b1 (08:00:27:84:a7:b1) Internet Protocol Version 4, Src: 192.168.1.11, Dst: 192.168.2.21 Transmission Control Protocol, Src Port: 50394, Dst Port: 8567, Seq: 1110009557, Ack: 790530083, Len: 14 74 503928567 [SYN] Seq-3891486205 Win-29200 Len- MSS-1460 SACK PERM-1 TSval-31 54 8567 50392 [RST, ACK] Seq-0 Ack-3891486206 Win=0 Len-0 74 503948567 [SYN] Seq-1110009541 Win-29200 Len-@ MSS-1460 SACK PERM-1 TSval-31 74 8567 50394 [SYN, ACK] Seq-790530882 Ack-1110009542 Win-28960 Len-@ MSS-1460 1 66 503948567 [ACK] Seq-1110009542 Ack-790530083 Win-29216 Len-@ TSval-31370981 78 503948567 [PSH, ACK] Seq-1110009542 Ack-790530083 Win-29216 Len-12 TSval-311 66 8567 50394 [ACK] Seq-790530083 Ack-1110009554 Win-28960 Len-@ TSval-17952231 8567 [PSH, ACK] Seq-1110009554 Ack-790530083 Win-29216 Len-3 TSval-3131 50394 [ACK] Seq-790530083 Ack-1110009557 Win-28960 Len-@ TSval-17959871 69 50394 66 8567 80 503948567 [PSH, ACK] Seq-1110009557 Ack-790530883 Win-29216 Len-14 TSval-31 B 27 cb 6e 9a 08 00 45 00 fd b4 ce a8 01 0b ce as 66 d 2f le 88 23 80 18 e8 ea ee 2f e7 ad 00 lb 73 20 6d 6f 6e 69 72 0a g this is monir- The sequence number and acknowledgment number of packet-14 are 1110009557 and 790530083, respectively. Answer the following questions using the above diagram. a. What is the next packet (packet number 15) sequence number? b. What is the next packet (packet number 15) acknowledgment number? c. What is the client port number? d. What is the server port number? The client is communicating with the server to get a reliable service. The server is not using a well-known port number to deliver the service. The client port is allocated by the operating system from the ephemeral range. The figure below shows several packets that are captured from a router that is in between the client and the server. The packets are captured by the Wireshark: 10.000000 192.168.1.11 20.001958 192.168.2.21 3 10.318572 192.168.1.11 410.312391 192.168.2.21 718.864711 192.168.1.11 818.866558 192.168.2.21 918.867934 192.168.1.11 10 22.647931 192.168.1.11 11 22.650171 192.168.2.21 12 25.704045 192.168.1.11 13 25.705027 192.168.2.21 14 28.479390 192.168.1.11 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 192.168.1.11 TCP 192.168.2.21 TCP 0000 08 00 27 84 a7 b1 es ee 0010 00 42 b8 90 40 00 40 06 0020 02 15 c4 da 21 77 42 29 0030 03 91 99 3f ee ee el ei 0040 67 93 74 68 69 73 20 69 74 50390-8567 [SYN] Seq-821837324 Win-29200 Len-0 MSS-1460 SACK_PERM-1 TSval-31 54 8567 50390 (RST, ACK] Seq- Ack-821837325 Win-0 Len-0 Frame 14: 80 bytes on wire (640 bits), 80 bytes captured (640 bits) Ethernet II, Sre: PcsCompu_cb:6e:9a (08:00:27:cb:6e:9a), Dst: PesCompu_84:a7:b1 (08:00:27:84:a7:b1) Internet Protocol Version 4, Src: 192.168.1.11, Dst: 192.168.2.21 Transmission Control Protocol, Src Port: 50394, Dst Port: 8567, Seq: 1110009557, Ack: 790530083, Len: 14 74 503928567 [SYN] Seq-3891486205 Win-29200 Len- MSS-1460 SACK PERM-1 TSval-31 54 8567 50392 [RST, ACK] Seq-0 Ack-3891486206 Win=0 Len-0 74 503948567 [SYN] Seq-1110009541 Win-29200 Len-@ MSS-1460 SACK PERM-1 TSval-31 74 8567 50394 [SYN, ACK] Seq-790530882 Ack-1110009542 Win-28960 Len-@ MSS-1460 1 66 503948567 [ACK] Seq-1110009542 Ack-790530083 Win-29216 Len-@ TSval-31370981 78 503948567 [PSH, ACK] Seq-1110009542 Ack-790530083 Win-29216 Len-12 TSval-311 66 8567 50394 [ACK] Seq-790530083 Ack-1110009554 Win-28960 Len-@ TSval-17952231 8567 [PSH, ACK] Seq-1110009554 Ack-790530083 Win-29216 Len-3 TSval-3131 50394 [ACK] Seq-790530083 Ack-1110009557 Win-28960 Len-@ TSval-17959871 69 50394 66 8567 80 503948567 [PSH, ACK] Seq-1110009557 Ack-790530883 Win-29216 Len-14 TSval-31 B 27 cb 6e 9a 08 00 45 00 fd b4 ce a8 01 0b ce as 66 d 2f le 88 23 80 18 e8 ea ee 2f e7 ad 00 lb 73 20 6d 6f 6e 69 72 0a g this is monir- The sequence number and acknowledgment number of packet-14 are 1110009557 and 790530083, respectively. Answer the following questions using the above diagram. a. What is the next packet (packet number 15) sequence number? b. What is the next packet (packet number 15) acknowledgment number? c. What is the client port number? d. What is the server port number?
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Related Book For
International Marketing And Export Management
ISBN: 9781292016924
8th Edition
Authors: Gerald Albaum , Alexander Josiassen , Edwin Duerr
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