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2. Answer C is correct. CDP could be used to discover the Layer 3 address of the peer. CDP operates at Layer 2 and could still function even when incorrect Layer 3 addresses are used. The local router could be manually configured to be in the same subnet as the router, and then remote access via telnet or Secure Shell (SSH) could be used to access the other router (from the local router). Once the router IP is changed, the local router should be changed back to the correct subnet address as well.

From

Cover of Cisco CCENT ICND1 100-101 Exam Cram, Second Edition

Note

You described answer B but said C was correct!!! How can I believe anything in this book with so many mistakes???