Windows event log ID 4648 fields- what does “network information” stand for?

As per Microsoft docs, 4648 stands for

"This event is generated when a process attempts to log on an account by explicitly specifying that account’s credentials. This most commonly occurs in batch-type configurations such as scheduled tasks, or when using the RUNAS command."

I am checking through event logs for identifying a security breach, and a 4648 event log is as follows.

A logon was attempted using explicit credentials.

Subject:

Security ID:        SYSTEM

Account Name:       <Removed>

Account Domain:     WORKGROUP

Logon ID:       0x3E7

Logon GUID:     {00000000-0000-0000-0000-000000000000}

Account Whose Credentials Were Used:

Account Name:       Administrator

Account Domain:     <Removed>

Logon GUID:     {00000000-0000-0000-0000-000000000000}

Target Server:

Target Server Name: localhost

Additional Information: localhost

Process Information:

Process ID:     0x1e0f4

Process Name:       C:\Windows\System32\winlogon.exe

Network Information:

Network Address:    12.34.56.78

Port:           12345

"

What does "Network Information" in the log stand for? Documentation was not clear for me and certainly 12.34.56.78 is another machine in the network.