Networking fundamentals — page 3
Objective 109 of LPIC-1 Exam 102-500, worth 23.33% of the exam. This is page 3 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 3 of 4)
- On a Debian host using the traditional ifupdown scheme you have edited the static address of eth0 in /etc/network/interfaces. The interface is currently up with the old address. Which command sequence puts the new settings into effect? machine-checked
- Type the command that reports a systemd system's hostname settings — static, and pretty or transient where they differ — together with its machine ID, operating system and kernel version. machine-checked
- Type the nmcli command, in full and without abbreviating any word, that lists the wireless access points NetworkManager can currently see. machine-checked
- Before recabling a server you must administratively disable the interface eth0, leaving the device present in the kernel so it can be brought back with a single command afterwards. Which iproute2 command does that? machine-checked
- Users report intermittent packet loss on a server and you suspect a faulty cable or duplex mismatch. Which command displays the per-interface packet, error, drop and collision counters for eth0 using iproute2? machine-checked
- A traceroute across a long provider path ends with rows of asterisks and never reaches the destination, although the host is reachable by other means. You establish that the target is roughly 36 hops away. Which option makes traceroute probe far enough? machine-checked
- A server has two interfaces, eth0 on the office LAN and eth1 on a storage network. You must verify that 203.0.113.9 answers when the echo requests leave through eth1, not through whichever interface routing would normally choose. Which command does that? machine-checked
- A provisioning script must record the non-loopback IP addresses currently configured on the machine's interfaces, and it must not depend on name resolution or on /etc/hosts. Which hostname invocation is appropriate? machine-checked
- A monitoring script calls ping and must never block: it should send exactly four echo requests to 192.0.2.10 and then exit. Which option enforces that? machine-checked
- A host has several routes and two interfaces, and you need to know which route, gateway and source address the kernel would actually select for traffic to 198.51.100.25 without sending any packets to it. Which command answers exactly that? machine-checked
- To move a file between two hosts on an isolated lab network with no SSH or FTP available, you decide to use netcat. On the receiving host, which command makes netcat wait for an inbound TCP connection on port 4242 and write whatever arrives into incoming.tar? machine-checked
- A host's routing table holds exactly these four entries: `default via 192.0.2.1 dev eth0`, `10.0.0.0/8 via 192.0.2.20 dev eth0`, `10.4.0.0/16 via 192.0.2.30 dev eth0` and `10.4.7.0/24 dev eth1 scope link`. How does the kernel forward a packet addressed to 10.4.7.9? machine-checked
- From the host 192.168.1.10, pinging a printer at 192.168.1.60 on the same /24 produces repeated lines reading `From 192.168.1.10 icmp_seq=1 Destination Host Unreachable`. What does this most directly indicate? machine-checked
- A switch advertises the IPv6 link-local address fe80::2e0:81ff:fe12:3456. Running `ping fe80::2e0:81ff:fe12:3456` on a host with several interfaces fails immediately with `connect: Invalid argument`. What is the correct fix? machine-checked
- A traceroute crawls along, pausing for several seconds at each hop before the line appears, and the site's DNS servers are known to be slow. Which option makes traceroute print addresses only and skip the delay? machine-checked
- Which THREE of these commands belong to the legacy net-tools package and have been superseded by iproute2 utilities on modern distributions? (Choose three.) machine-checked
- A border firewall discards the UDP datagrams that Linux traceroute sends by default, so every hop beyond it is shown as asterisks. Which TWO options make traceroute send its probes with a protocol other than UDP? (Choose two.) machine-checked
- Type the command, with no options and no arguments, that prints the system's currently configured host name to standard output. machine-checked
- An interface has accumulated several stale addresses from repeated manual configuration. Type the complete iproute2 command that removes every address currently assigned to eth0 in one step, while leaving the device itself up. machine-checked
- On an older system whose traceroute binary rejects a -6 flag, the IPv6 counterpart of traceroute itself is installed as a separate program under its own name. Type that command name only, with no options or arguments. 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