7 terms
ifconfig is the legacy Linux command for viewing and configuring network interfaces, addresses and flags, now largely replaced by the ip command.
The ip command is the Linux networking tool from iproute2 that shows and changes interfaces, addresses, routes and neighbors through the kernel's Netlink API.
iptables is the classic Linux command-line tool for defining packet filtering and NAT rules that the kernel's Netfilter framework applies to traffic.
Netplan is a Linux network configuration utility that turns declarative YAML files into settings for systemd-networkd or NetworkManager, standard on Ubuntu.
NetworkManager is the Linux networking daemon that configures wired, wireless, VPN and mobile connections automatically from stored connection profiles.
nftables is the Linux kernel packet classification framework and nft tool that replaced iptables for firewall filtering, NAT and packet mangling.
UFW is the simplified host firewall frontend in Linux that turns short allow and deny commands into netfilter rules for iptables or nftables.
Terms explained in another topic that belong here too.
Link aggregation bundles several parallel Ethernet links into one logical link, adding capacity and redundancy between switches, servers and storage.