350-401 Question #518: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. A network engineer must configure NETCONF. After creating the configuration, the engineer gets output from the command show line, but not from show running- config. Which command completes the configuration?

Options

• ADevice(config)# netconf max-sessions 100
• BDevice(config)# no netconf ssh acl 1
• CDevice(config)# netconf lock-time 500
• DDevice(config)# netconf max-message 1000

Explanation

NETCONF Configuration Explanation

Option D (netconf max-message 1000) is correct because NETCONF has a default maximum message size limit, and when this limit is too small, larger outputs like show running-config are truncated or blocked entirely - while smaller outputs like show line pass through successfully. Increasing the max-message size allows NETCONF to handle larger data payloads, resolving the issue.

Why the distractors are wrong:

• Option A (max-sessions 100) controls how many concurrent NETCONF sessions are allowed, which is unrelated to message output size limitations.
• Option B (no netconf ssh acl 1) removes an access control list restriction, which would affect who can connect, not what data can be returned in a session.
• Option C (lock-time 500) configures how long a NETCONF lock persists on a datastore - a locking/concurrency feature, not a message size setting.

Memory Tip: Think of it this way - show running-config is a large file, so you need a large message limit. Associate "big config = big message size." If partial outputs work but large outputs fail, always suspect a message size constraint in NETCONF.

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