Shortest answer is: User objects have security identifiers (SIDs), so users can log in and have assigned permissions. Contacts do not have SIDs. Continue reading “Active Directory: what is difference between user object and contact object?”
TCP/IP is acronim for Transmission Control Protocol / Internet Protocol. They are two main protocols used in modern networks.
On this site you will find some examples how to configure Cisco routers and switches. I will try to make it most simply possible. If you have suggestions, contact me or leave some comment.