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Summary

  • The TCP/IP network model is a simplified, four-layered set of abstractions that describes how different protocols interoperate for computers to send traffic from one machine to another over the internet.

  • IPv4 is the primary network protocol on the internet today.

  • IPv6 is intended as an eventual replacement for the IPv4 network protocol.

  • By default, Red Hat Enterprise Linux operates in dual-stack mode, and uses both network protocols in parallel.

  • Network routes determine the correct network interface to send packets to a particular network.

  • The NetworkManager daemon monitors and manages network configuration.

  • The nmcli command-line tool configures network settings with the NetworkManager daemon.

  • Starting in Red Hat Enterprise Linux 9, the default location for network configurations is the /etc/NetworkManager/system-connections directory.

  • The system's static hostname is stored in the /etc/hostname file.

  • The hostnamectl command modifies or views the status of the system's hostname and related settings.

Revision: rh124-9.3-770cc61