I want to find Network boundaries in this i don't know how to figure out network boundaries and explain

Wireshark Protocol Hierarchy Statistics Wireshark Capture File for training - Percent Packets 100.0 100.0 0.0 0.0 0.0 0.0 98.6 0.9 Packets Percent Bytes 21206 100.0 21206 7.6 1 0.0 1 0.0 1 0.0 1 0.0 20901 10.7 183 0.0 96 0.1 40 0.2 40 0.1 40 0.0 1464 0.5 0.2 0.2 2% 48 0.2 0.2 40 0.0 0.0 0.0 0.2 0.1 Protocol Frame Ethernet Logical-Link Control Data Internet Protocol Version 6 Internet Control Message Protocol v6 Internet Protocol Version 4 User Datagram Protocol NetBIOS Name Service NetBIOS Datagram Service SMB (Server Message Block Protocol) SMB MailSlot Protocol Microsoft Windows Browser Protocol Dynamic Host Configuration Protocol Domain Name System Data Transmission Control Protocol Virtual Network Computing SSH Protocol Hypertext Transfer Protocol MIME Multipart Media Encapsulation Media Type: message/http Media Type Line-based text data JPEG File Interchange Format JavaScript Object Notation HTML Form URL Encoded eXtensible Markup Language Compuserve GIF Internet Group Management Protocol Address Resolution Protocol Bytes Bits/s End Packets End Bytes End Bits/s 3896621 5003 0 0 0 296884 381 0 0 0 6 0 0 0 0 2 0 1 2 0 40 0 0 0 0 32 0 1 32 0 418420 537 0 0 0 1 0 0 0 5232 6 96 5232 6 8423 10 0 0 0 5143 6 0 0 0 1000 1 0 0 0 1703 2 40 1703 2 1235 1 4 1235 1 2498 3 40 2498 3 120 0 3 120 0 3145477 4039 15384 1195613 1535 72 0 6 72 0 26049 33 239 33 2401572 3083 2333 500726 642 19188 24 31 19188 24 139 0 1 139 0 714 0 2 714 0 743293 954 2510 725945 932 214967 276 4 216156 277 5626 7 2 1810 2 49648 63 98 49834 63 118699 152 7 119787 153 205148 263 1 205446 263 1200 1 100 1200 1 12624 16 303 12624 16 0.0 80.7 0.0 97.2 0.0 1.1 23.5 40 3 20618 6 239 4993 31 1 2 2510 26049 0.0 0.7 61.6 0.5 0.0 0.1 0.0 0.0 11.8 0.0 19.1 4 5.5 0.0 0.0 0.5 6 98 0.1 1.3 3.0 0.0 7 0.0 1 0.5 1.4 100 303 5.3 0.0 0.3 No display filter