NE NE Network Management and Monitoring 2

Question 1

What is the purpose of NTP (Network Time Protocol) in a managed network?

Accepted Answer

To synchronize clocks across all network devices for consistent log timestamps and security operations

Answer

NTP synchronizes device clocks to a reference time source, ensuring accurate log timestamps, certificate validity checks, and security event correlation.

Question 2

What is SNMP trapping used for?

Accepted Answer

Allowing devices to proactively send unsolicited alerts to the NMS when specific events occur

Answer

SNMP traps enable devices to immediately notify the NMS of critical events (link down, threshold crossed) without waiting for the next polling cycle.

Question 3

What does RSPAN (Remote SPAN) allow compared to standard SPAN port mirroring?

Accepted Answer

RSPAN allows mirroring traffic to a port on a different switch across the network

Answer

RSPAN extends port mirroring across multiple switches using a dedicated VLAN, allowing a network analyzer connected to a remote switch to capture traffic from source ports.

Question 4

Which protocol is used to provide centralized device authentication and authorization using a TCP-based connection with encrypted payloads?

Accepted Answer

TACACS+

Answer

TACACS+ uses TCP port 49 and encrypts the entire payload, providing separate AAA functions; it's preferred over RADIUS for device administration.

Question 5

What is the purpose of a network management VLAN (or out-of-band management network)?

Accepted Answer

To separate management traffic from user data traffic, reducing the attack surface

Answer

An out-of-band management network or dedicated management VLAN isolates device administration from production traffic, reducing security risk and ensuring management access during outages.

NE - Network Engineer Practice Test

NE - Network Engineer Practice Test

NE NE Network Management and Monitoring 2