Port 389 Answer: Lightweight Directory Access Protocol (LDAP)
Port 443 Answer: HTTPS (Hypertext Transfer Protocol Secure)
Port 445 Answer: SMB (Server Message Block) or CIFS (Common Internet File
System).
Server Message Block (SMB), one version of which was also known as Common
Internet File System (CIFS), is a communication protocol for providing shared
access to files, printers, and serial ports between nodes on a network. It also
provides an authenticated inter-process communication mechanism. Most usage
of SMB involves computers running Microsoft Windows, where it was known as
"Microsoft Windows Network" before the introduction of Active Directory.
Corresponding Windows services are LAN Manager Server for the server
component, and LAN Manager Workstation for the client component.[4]
Port 427 Answer: SLP (Service Location Protocol)
SLP is used by devices to announce services on a local network. Each service must
have a URL that is used to locate the service. Additionally it may have an unlimited
number of name/value pairs, called attributes. Each device must always be in one
or more scopes. Scopes are simple strings and are used to group services,
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