---
title: Packet · Pele
description: Show the fields of a network packet.
---

```mermaid
---
title: "TCP Packet"
---
packet
0-15: "Source Port"
16-31: "Destination Port"
32-63: "Sequence Number"
64-95: "Acknowledgment Number"
96-99: "Data Offset"
100-105: "Reserved"
106: "URG"
107: "ACK"
108: "PSH"
109: "RST"
110: "SYN"
111: "FIN"
112-127: "Window"
128-143: "Checksum"
144-159: "Urgent Pointer"
160-191: "(Options and Padding)"
192-255: "Data (variable length)"
```

```mermaid
packet
title UDP Packet
+16: "Source Port"
+16: "Destination Port"
32-47: "Length"
48-63: "Checksum"
64-95: "Data (variable length)"
```

```mermaid
---
config:
  packet:
    showBits: true
    bitOrder: descending
    bitsPerRow: 16
---
packet
0-7: "DATA"
8-11: "TYPE"
12: "EN"
13-15: "RESERVED"
```

```mermaid
---
config:
  packet:
    showBits: true
  themeVariables:
    packet:
      startByteColor: red
---
packet
0-15: "Source Port"
16-31: "Destination Port"
32-63: "Sequence Number"
```