CompTIA Linux+ XK0-005 Networking Fundamentals Flashcards
CompTIA Linux+ XK0-005 (v7) Flashcards
| Front | Back |
| What does DHCP stand for? | Dynamic Host Configuration Protocol |
| What does NAT stand for? | Network Address Translation |
| What does TCP stand for? | Transmission Control Protocol |
| What is the default port for HTTPS traffic? | 443 |
| Which command can list open ports in firewalld? | firewall-cmd --list-ports |
| Which command can modify network interface settings on the fly? | ip |
| Which command displays the routing table? | route or ip route |
| Which command enables adding firewall rules in iptables? | iptables -A |
| Which command is used to test DNS name resolution? | dig or nslookup |
| Which command lists active TCP connections and listening ports in Linux? | netstat or ss |
| Which command quickly checks host reachability? | ping |
| Which command shows detailed IP information for all interfaces? | ip addr show |
| Which command traces the path a packet follows to a destination? | traceroute |
| Which file holds global SSH configuration settings on the system? | /etc/ssh/ssh_config |
| Which file is used to configure static IP addresses on Debian-based systems? | /etc/network/interfaces |
| Which file stores mappings of hostnames to IP addresses on the local system? | /etc/hosts |
| Which port does SSH typically use? | 22 |
| Which port is typically used for DNS over UDP? | 53 |
| Which protocol is used to securely copy files over SSH? | scp |
| Which SSH client configuration file holds per-user settings? | ~/.ssh/config |
About the Flashcards
Flashcards for the CompTIA Linux+ exam guide you through essential networking fundamentals, from knowing that TCP stands for Transmission Control Protocol to recalling that SSH communicates over port 22 and HTTPS over port 443. The deck reinforces quick-reference numbers and protocol names while drilling key Linux commands such as ip, netstat/ss, ping, and traceroute so you can diagnose connectivity issues with confidence.
You will also review critical configuration files like /etc/network/interfaces, /etc/hosts, and per-user SSH settings, alongside concepts such as NAT, DHCP, and routing tables. Practice adding iptables rules, listing firewalld ports, and testing DNS with dig or nslookup to solidify the skills most frequently assessed on exam day.
Topics covered in this flashcard deck:
- TCP/UDP port numbers
- Linux networking commands
- Routing & NAT concepts
- DNS and DHCP basics
- Firewall configuration
- SSH and secure transfer