- What is HTTP/HTTPS, and what port does it use?
- What is FTP, and what port does it use?
- What is SSH, and what port does it use?
- What is DHCP?
- What is TCP/UDP?
- What is ICMP?
- What are IP classes?
- What is DNS?
- What is a firewall?
- What is a proxy server?
- What is a subnet mask?
- What are 127.0.0.1 and localhost?
- What is the difference between a workgroup and a domain?
- How does Tracert work, and what protocol does it use?
- What is Two-Factor Authentication?
- What is an IDS?
- What are the main differences between Windows® Home, Windows® Pro, and Windows Server® operating systems?
- What is the difference between ifconfig and ipconfig?
- What are the differences between the PowerShell®, Command Prompt, and Bash command-line shells?
- What is a root account?
- What is telnet?
- How would you add local users when on a domain machine?
- What is ARP?
- What is EFS?
- What is Boot to LAN?
- What are terminal services?
- What are shadow copies?
- Why would you use external media, such as tapes or hard disks, for backups?
- What is the difference between RDP and KVM?
- What is the difference between a print server and a network-attached printer?
- What is /etc/passwd?
- Why would you virtualize systems?
- Why would you create logon scripts?
- What is the difference between single-mode and multimode fiber?
- What does it mean when you receive an NTFS Error: 5?
- What are 755 and 644 permissions of the UNIX® and Linux® systems?
- Why is it easier to maintain permissions via groups instead of individually?
- What is the difference between a forest, a tree, and a domain?
- What are the differences between local, global, and universal groups?
- What are strong password requirements?
- What is SNMP?
- What is a VLAN?
- What is the difference between Telnet and SSH?
- What is the difference between UNIX and Linux?
- What is RAID? What kinds of RAID you know?
- What is the difference between IMAP and POP3?
- What monitoring systems do you know?
- How can you install Windows on multiple computers at the same time?
Network
- Computer Networks: Principles, Technologies and Protocols for Network Design / Natalia Olifer, Victor Olifer: translated from Russian into English by A-List Publishing, LLC
Windows Server
- Windows Server® 2016 Unleashed, 1st ed. / Rand Morimoto, Jeffrey Shapiro, Guy Yardeni, Omar Droubi, Michael Noel, Andrew Abbate, Chris Amaris: Sams Publishing, 2017
- Mastering Windows Server 2019: The complete guide for IT professionals to install and manage Windows Server 2019 and deploy new capabilities, 2nd ed. / Jordan Krause: Packt Publishing, 2019
Linux
- Linux® Bible, 9th ed. / Christopher Negus: John Wiley & Sons, Inc., 2015
- Linux Network Administrator's Guide, 2nd ed. / Olaf Kirch, Terry Dawson: O’Reilly Media, 2000
- Red Hat® and CentOS™ 7 Precise / Shiv Kumar Goyal: 2017
- Red Hat® Enterprise Linux® Server Cookbook / William Leemans: Packt Publishing, 2015