RFC 5735 Addresses | CCIE Security Exam | Cisco

RFC 5735 Addresses

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Question

Which three are RFC 5735 addresses? (Choose three.)

Answers

Explanations

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A. B. C. D. E. F.

BCE.

RFC 5735 defines special IPv4 address blocks that are reserved for specific purposes and should not be used for general addressing purposes. These address blocks are commonly referred to as "RFC 5735 addresses". The question asks to identify which of the given IP address blocks are part of this reserved set.

The correct answers are:

B. 0.0.0.0/8 C. 203.0.113.0/24 E. 172.16.0.0/12

Explanation:

A. 171.10.0.0/24 - This address block is not part of the RFC 5735 reserved set. It is a public IP address range that can be used for general addressing purposes.

B. 0.0.0.0/8 - This address block is part of the RFC 5735 reserved set and is reserved for use as a source address for "this" host on "this" network. It should not be used as a destination address or as a source address outside the host's local network.

C. 203.0.113.0/24 - This address block is part of the RFC 5735 reserved set and is reserved for use in documentation examples. It should not be used for general addressing purposes.

D. 192.80.90.0/24 - This address block is not part of the RFC 5735 reserved set. It is a public IP address range that can be used for general addressing purposes.

E. 172.16.0.0/12 - This address block is part of the RFC 5735 reserved set and is reserved for use in private networks. It should not be routed on the public Internet.

F. 198.50.100.0/24 - This address block is not part of the RFC 5735 reserved set. It is a public IP address range that can be used for general addressing purposes.

In summary, the RFC 5735 reserved set includes the following address blocks:

  • 0.0.0.0/8
  • 192.0.2.0/24
  • 198.51.100.0/24
  • 203.0.113.0/24
  • 224.0.0.0/4
  • 240.0.0.0/4

It's important to note that while these addresses are reserved for specific purposes, they can still be used within their intended contexts. However, using them outside of their intended contexts can cause network connectivity issues or conflicts.