QuestionQ1

Analyze requirements

You are engaged by a customer with 1,115 employees to update the network after the previous network manager has left the company.

Which methods can validate the present network state when the available network documentation is out of date?

Choose two
  • A Documenting existing network configuration and topology is not required. Previous iterations of network designs are considered obsolete and the best practice is that new designs are 'clean-sheet' designs.
  • B Begin searching through file shares for old documentation and compare the files and drawings to each other.
  • C Physically examine the network devices and trace the cables from device to device documenting the connections and cabling type.
  • D Use neighbor discovery protocols to learn neighbor relationships, document the connections and build a topology from the learned information.
  • E Interview random company staff to gather the 'tribal knowledge' of how the network functions during normal operations and degraded states.
Explanation

Physical inspection and cable tracing establish the actual device-to-device connections and cabling in use. Neighbor-discovery protocols such as CDP and LLDP automatically identify directly connected devices and their interfaces, providing observed relationship data from which a current topology can be documented. Cisco describes CDP and LLDP as device-discovery protocols that allow network management applications to automatically discover connected devices.

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