28 Jun ECET375 Homework # 7
Name:
ECET375
Homework # 7
| Chapter 22 (4,6,8) |
| 4. Use the following network analyzer display of an ICMP packet to answer the following questions:
0000 00 00 1C 2B B2 16 00 B0 AA BB CC DD EE FF 00 11 a. What kind of ICMP message is this (query or error reporting)? b. What type of IMCP message is this? c. What is the code for this message? d. What is the identification number (hex)? e. What is the sequence number (hex)? f. Does the packet contain any information? |
| 6. Use the following network analyzer display of an ICMP packet to answer the following questions:
0000 12 00 B3 4A A2 4B 03 B2 FF FF C0 00 a. What kind of ICMP message is this (request or reply)? b. What is this type number for this ICMP message (Decimal)? c. What information is contained in bytes 9 to 12? d. If the information in bytes 9 to 12 is an IP address, what is its value (dotted decimal)?
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| 8. Use the following network analyzer display of an ICMP destination-unreachable packet to answer the following questions:
0000 03 03 40 12 00 00 00 00 45 62 00 C8 DC 08 00 00 0010 F3 11 02 DC 32 14 10 01 C0 99 40 12 00 11 22 33 a. Why was the destination unreachable? b. Was this message sent from a router or a host? c. What type of protocol was in the failed datagram? d. What was the time to live of the failed packet (decimal)? e. What is the address of the destination of the failed datagram (dotted decimal)? f. What is the address of the source of the failed datagram (dotted decimal)?
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| Chapter 23 (2,5,6,7) |
| 2. Determine the TCIP/IP protocol assigned the following port numbers:
a. 19 – b. 7 – c. 162 – d. 25 – e. 111 – f. 520 – |
| 5. Determine the meaning of the following session-bit flag fields:
a. 11 hex b. 10 hex d. 18 hex d. 04 hex e. 02 hex f. 19 hex |
| 6. Use the following network analyzer display of an IP datagram carrying UDP to answer the following questions:
0000 45 44 00 4A A0 A2 04 00 F5 11 A2 35 C0 99 B4 01 0010 C0 99 B4 02 D6 D8 00 45 00 36 20 A3 B2 91 00 A2 a. What IP version is being used? b. Are IP options being used? c. What is the precedence? d. What type of service is being requested? e. How many data bytes are included in the IP datagram (decimal)? f. Is fragmenting allowed? g. Is this the first, last, or a middle fragment? h. What is the decimal number of the first byte in this fragment? i. How many routers has this diagram propagated through (decimal)? j. What is the source IP address (dotted decimal)? k. What is the destination IP address (dotted decimal)? l. What is the source port number (dotted decimal)? m. What is the category of the source port? n. Is the source most likely a client or a server? o. What is the destination port number (decimal)? p. What is the category of the destination port? q. Is the destination most likely a client or a server? r. What protocol is the destination process? |
| 7. Use the following network analyzer display of an IP datagram carrying TCP to answer the following questions:
0000 45 44 00 4A A0 A2 04 00 F5 06 A2 35 C0 99 40 B2 0010 C0 99 40 A1 00 35 D0 A2 04 A2 B1 22 00 1A 46 A2 0020 50 12 10 00 56 8F 00 00 00 00 00 00 00 00 00 00 a. What is the source port number (decimal)? b. What is the category of the source port? f c. Is the source most likely a client or a server? d. What is the destination port number (decimal)? e. What is the category of the destination port? f. Is the destination most likely a client or a server? g. What protocol is the source process? h. How many bytes are in the TCP header (decimal)? i. Which session flags are set? j. What is the sender’s window size (decimal)? k. Assuming that no errors have occurred, what should be the destination’s acknowledgement number? l. Assuming that no errors have occurred, what should be the destination’s source sequence number?
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