NIC
ethereal—The GNOME graphical network scanner
ufw—Ubuntu’s basic firewalling tool
ifconfig—A tool that displays and manages Linux networking devices
iwconfig—A tool that displays and sets wireless network device
parameters
route—A tool that displays and manages Linux kernel routing table
ssh—The OpenSSH remote-login client and preferred replacement for
telnet
nm-connection-editor—Ubuntu’s GUI for configuring network
connections
References
https://help.ubuntu.com/18.04/serverguide/networking.html
—Official networking help for Ubuntu
http://www.ietf.org/rfc.html—Site to search for or get a list of Requests for
Comments (RFCs)
http://www.isc.org/products/DHCP/—The official site for DHCP
http://www.ieee.org—The Institute of Electrical and Electronics Engineers
(IEEE) website
Teach Yourself TCP/IP Network Administration in 21 Days by Joe
Casad—Good introduction to the topic
TCP/IP Network Administration by Craig Hunt and Gigi Estabrook
—A more detailed look
The DHCP Handbook by Ralph Droms and Ted Lemon—A complete
reference for understanding DHCP