Networking fundamentals — page 4
Objective 109 of LPIC-1 Exam 102-500, worth 23.33% of the exam. This is page 4 of 4 of its question list; page one carries the full objective summary.
- Share of the exam
- 23.33%
- Questions in a real sitting
- roughly 14 of 60
- Questions in this bank
- 70
- Signed for by a person
- 0
- Machine-checked only
- 70
Partly checked. None of the 70 questions here has been read against the cited source by a person. 70 questions have been checked against their cited clause by an automated pass — which is not the same thing, and is not a signature.
Only questions a person has signed for are used in mock exams here. That is the whole difference between the two kinds of checking above.
How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
What this objective covers
The 70 questions written for this objective cite 3 LPI exam objectives (109.1, 109.2, 109.3) and 28 manual pages (dig(1), getent(1), host(1), hostname(1), hostnamectl(1), hosts(5), icmp(7), ifup(8), ip(8), ip-address(8), ip-link(8), ip-neighbour(8), ip-route(8), ipv6(7), nc(1), netstat(8), networkctl(1), nm-settings-keyfile(5), nmcli(1), nsswitch.conf(5), ping(8), resolv.conf(5), resolved.conf(5), ss(8), systemd.network(5), tracepath(8), traceroute(8), traceroute6(8)).
They break down as 49 single-answer questions, 9 choose-several questions and 12 type-the-answer questions.
Drill this objective
The trainer can run a short practice set drawn from this objective alone, which is what the weight column above is for: revise the heavy objectives first.
Practise Networking fundamentals
Questions on this objective (page 4 of 4)
- A new internal zone has been loaded on the name server 192.0.2.53, but the workstation you are sitting at still uses the old resolvers listed in /etc/resolv.conf. Which command asks that one server directly for the A record of db01.example.com? machine-checked
- You add the line `10.0.0.9 build.example.com` to /etc/hosts on a test machine, but applications still connect to the public address that DNS returns. /etc/nsswitch.conf contains `hosts: dns files`. What is the correct fix? machine-checked
- A colleague lists five nameserver lines in /etc/resolv.conf so that the host has plenty of fallbacks. On a glibc system, what happens to the fourth and fifth entries? machine-checked
- An application connects to `licence.example.com` without trouble, yet `dig licence.example.com` returns NXDOMAIN. Which command best confirms where the working answer is actually coming from? machine-checked
- On a host running systemd-resolved, /etc/resolv.conf is a symbolic link into /run and contains the single entry `nameserver 127.0.0.53`. Your hand-edited nameserver lines vanish after every reboot. Where should the upstream DNS servers be set instead? machine-checked
- Mail to example.com is bouncing and you want to see which mail exchangers the domain publishes. Type the complete command, using the host utility and the option that selects a record type, that queries only the MX records of example.com. machine-checked
- A log line records a connection from 192.0.2.25 and you want the PTR record for that address. Type the complete dig command, with no @server and no query options, that performs the reverse lookup. machine-checked
- Which THREE statements about /etc/hosts on a glibc system are correct? (Choose three.) machine-checked
- The first nameserver in /etc/resolv.conf is unreachable, and every lookup on the host stalls for five seconds before the second server answers. Which resolv.conf directive shortens that per-server wait? machine-checked
- Before switching a service to dual-stack, you want to see every address, IPv4 and IPv6, that the system's normal resolution path returns for `www.example.com`. Which command does that? machine-checked
Practise Networking fundamentals
The other objectives in LPIC-1 Exam 102-500
- 105. Shells and shell scripting — 15% of the exam
- 106. User interfaces and desktops — 6.67% of the exam
- 107. Administrative tasks — 20% of the exam
- 108. Essential system services — 18.33% of the exam
- 110. Security — 16.67% of the exam