RFC 5735 Special Use Addresses | CCIE Security Exam | Cisco

Special Use Addresses as Defined in RFC 5735

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Question

Which three addresses are special use as defined in RFC 5735? (Choose three.)

Answers

Explanations

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

BCE.

RFC 5735 defines a number of address blocks that are reserved for special use and should not be used as public IP addresses on the Internet.

The three addresses that are special use as defined in RFC 5735 are:

  1. 0.0.0.0/8: This address block includes all addresses with a leading octet of zero. It is reserved for use as the default route or source address in certain contexts, but should not be used as a destination address.

  2. 192.0.2.0/24: This address block is reserved for use in documentation and examples. It is not intended for use on the public Internet.

  3. 198.51.100.0/24: This address block is also reserved for use in documentation and examples. It is not intended for use on the public Internet.

The other answer options in the question are not among the address blocks reserved for special use by RFC 5735.

Option A (171.10.0.0/24), Option C (203.0.113.0/24), Option D (192.80.90.0/24), and Option F (198.50.100.0/24) are not among the reserved address blocks defined by RFC 5735.

Option E (172.16.0.0/12) is also reserved for private use and is commonly used for internal networks. While it is not listed in RFC 5735, it is defined in RFC 1918 as a private address space that should not be routed on the public Internet.