Question 240 of 2,015

SNMP and Syslog →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the interface has experienced one reset since the last counter clear. This conclusion is drawn directly from the "show interfaces counters interpretation" of the output, specifically the line "0 output errors, 0 collisions, 1 interface resets." Interface resets increment when the hardware or software reinitializes the interface, often due to a cable fault, a duplex mismatch, or an administrative shutdown/no shutdown cycle. On the ENCOR 350-401 exam, this command tests your ability to read interface statistics and distinguish between normal operation and historical issues; a common trap is to focus on the "up/up" status and ignore the counters, missing the past reset event. Remember that counters persist until manually cleared, so a single reset does not indicate a current problem but does signal a past disruption. Memory tip: "Resets are history, not health"—always scan the counters for past events even when the interface looks clean.

350-401 SNMP and Syslog Practice Question

This 350-401 practice question tests your understanding of snmp and syslog. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A network engineer runs the following command on Router R3:

R3# show interfaces GigabitEthernet0/0

GigabitEthernet0/0 is up, line protocol is up Hardware is ISR4331-2x1GE, address is aabb.cc00.0300 (bia aabb.cc00.0300) Internet address is 10.0.0.3/24 MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec) Full-duplex, 1000Mb/s, media type is RJ45 output flow-control is unsupported, input flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 1000 bits/sec, 2 packets/sec 5 minute output rate 2000 bits/sec, 3 packets/sec 12345 packets input, 1234567 bytes, 0 no buffer Received 123 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 12345 packets output, 2345678 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 unknown protocol drops 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 pause output 0 output buffer failures, 0 output buffers swapped out

Based on this output, what can be concluded?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "never"
Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.

Question 1mediummultiple choice

Study the full multicast explanation →

A
The interface has experienced a hardware failure.
Why wrong: The interface is up/up, so no hardware failure is present. The reset count is low and may be due to a transient event.
B
The interface has had one reset since the last counter clear.
The output shows '1 interface resets', which is a counter that increments each time the interface is reset.
C
The interface is experiencing high input errors.
Why wrong: Input errors are 0, so there are no input errors.
D
The interface is operating at half-duplex.
Why wrong: The output clearly states 'Full-duplex'.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The interface has had one reset since the last counter clear.

The output shows the interface is up/up. The key clue is '1 interface resets' in the output counters. Interface resets can occur due to hardware issues, cable problems, or when the interface is administratively reset. The presence of 1 reset indicates a past event, but the interface is currently operational. The question tests understanding of interface counters.

Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The interface has experienced a hardware failure.
Why it's wrong here
The interface is up/up, so no hardware failure is present. The reset count is low and may be due to a transient event.
✓
The interface has had one reset since the last counter clear.
Why this is correct
The output shows '1 interface resets', which is a counter that increments each time the interface is reset.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
CIDR notation defines the prefix length.
✗
The interface is experiencing high input errors.
Why it's wrong here
Input errors are 0, so there are no input errors.
✗
The interface is operating at half-duplex.
Why it's wrong here
The output clearly states 'Full-duplex'.

Common exam traps

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Trap categories for this question

Command / output trap
The output clearly states 'Full-duplex'.

Detailed technical explanation

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.

TExam Day Tips

Write the block size before choosing the subnet.
Check whether the question asks for hosts, subnets or a specific address range.
Do not confuse /24, /25, /26 and /27 host counts.

Key takeaway

Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Real-world example

How this comes up in practice

A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.

What to study next

Got this wrong? Here's your next step.

Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 350-401 subnetting questions on CIDR, address ranges, and subnet selection.

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FAQ

Questions learners often ask

What does this 350-401 question test?

SNMP and Syslog — This question tests SNMP and Syslog — CIDR notation defines the prefix length..

What is the correct answer to this question?

The correct answer is: The interface has had one reset since the last counter clear. — The output shows the interface is up/up. The key clue is '1 interface resets' in the output counters. Interface resets can occur due to hardware issues, cable problems, or when the interface is administratively reset. The presence of 1 reset indicates a past event, but the interface is currently operational. The question tests understanding of interface counters.

What should I do if I get this 350-401 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.

What is the key concept behind this question?

CIDR notation defines the prefix length.

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