What is the largest possible source port number

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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What is the largest possible source port number? (Hint:see the hint in 4.)

The image displays a packet analysis of an Internet Protocol Version 4 (IPv4) datagram using a network tool, likely Wireshark. Below is the detailed transcription and explanation of the fields shown in the image:

### Internet Protocol Version 4

- **Source IP Address:** 10.0.0.2
- **Destination IP Address:** 239.255.255.250
- **Version:** 4
- **Header Length:** 20 bytes
- **Differentiated Services Field:** 0x00 (DSCP: CS0, ECN: Not-ECT)
- **Total Length:** 63 bytes
- **Identification:** 0x17f0 (6128)
- **Flags:** 0x40, Don't fragment
- **Fragment Offset:** 0
- **Time to Live (TTL):** 64
- **Protocol:** UDP (17)
- **Header Checksum:** 0x28c2 (validation disabled)
- **Header Checksum Status:** Unverified

### User Datagram Protocol (UDP)

- **Source Port:** 32907
- **Destination Port:** 15600
- **Length:** 43 bytes
- **Checksum:** 0xffe8 (unverified)
- **Checksum Status:** Unverified
- **UDP Payload Size:** 35 bytes

### Data

- The data section mentions a payload of 35 bytes, but the exact data content is not displayed.

This breakdown shows an IPv4 datagram carrying a UDP packet without any fragmentation. The total length of the datagram is 63 bytes, including the headers and the payload. The destination address is a multicast address, often used for network services like UPnP (Universal Plug and Play). The unverified checksum fields indicate that the packet's integrity validation is not performed in this capture.
Transcribed Image Text:The image displays a packet analysis of an Internet Protocol Version 4 (IPv4) datagram using a network tool, likely Wireshark. Below is the detailed transcription and explanation of the fields shown in the image: ### Internet Protocol Version 4 - **Source IP Address:** 10.0.0.2 - **Destination IP Address:** 239.255.255.250 - **Version:** 4 - **Header Length:** 20 bytes - **Differentiated Services Field:** 0x00 (DSCP: CS0, ECN: Not-ECT) - **Total Length:** 63 bytes - **Identification:** 0x17f0 (6128) - **Flags:** 0x40, Don't fragment - **Fragment Offset:** 0 - **Time to Live (TTL):** 64 - **Protocol:** UDP (17) - **Header Checksum:** 0x28c2 (validation disabled) - **Header Checksum Status:** Unverified ### User Datagram Protocol (UDP) - **Source Port:** 32907 - **Destination Port:** 15600 - **Length:** 43 bytes - **Checksum:** 0xffe8 (unverified) - **Checksum Status:** Unverified - **UDP Payload Size:** 35 bytes ### Data - The data section mentions a payload of 35 bytes, but the exact data content is not displayed. This breakdown shows an IPv4 datagram carrying a UDP packet without any fragmentation. The total length of the datagram is 63 bytes, including the headers and the payload. The destination address is a multicast address, often used for network services like UPnP (Universal Plug and Play). The unverified checksum fields indicate that the packet's integrity validation is not performed in this capture.
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