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205.3 - Troubleshooting Network Issues

Weight: 4

Description: Candidates should be able to identify and correct common network setup issues, to include knowledge of locations for basic configuration files and commands.

Key Knowledge Areas:

  • Location and content of access restriction files
  • Utilities to configure and manipulate ethernet network interfaces
  • Utilities to manage routing tables
  • Utilities to list network states.
  • Utilities to gain information about the network configuration
  • Methods of information about the recognized and used hardware devices
  • System initialization files and their contents (SysV init process)
  • Awareness of NetworkManager and its impact on network configuration

Terms and Utilities:

  • ip
  • ifconfig
  • route
  • ss
  • netstat
  • /etc/network/, /etc/sysconfig/network-scripts/
  • ping, ping6
  • traceroute, traceroute6
  • mtr
  • hostname
  • System log files such as /var/log/syslog, /var/log/messages and the systemd journal
  • dmesg
  • /etc/resolv.conf
  • /etc/hosts
  • /etc/hostname, /etc/HOSTNAME
  • /etc/hosts.allow, /etc/hosts.deny

Piste : • DOE600 - Course Presentation • LCF206 - Gestion de l'Archivage et de la Compression • Aborah - Session de Formation à Distance par IT Training • Ubuntu 14.04 • CompTIA+ / LPIC-1 • SER303 - Configuration du serveur Tomcat • SER401 - Présentation, Installation et Configuration • Relance ESN • ib groupe Cegos - Session de Formation à Distance par IT Training • 205.3 - Troubleshooting Network Issues

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