What is the binary pattern of unique ipv6 unique local address?
What is the binary pattern of unique ipv6 unique local address?
The binary pattern for a unique IPv6 Unique Local Address (ULA) is 11111101. This corresponds to the address block fd00::/8, which is used for ULAs. According to RFC 4193, the eighth bit must be set to 1, making the first 8 bits 11111101 in binary. The prefix fd00::/8 ensures that these addresses are used for local communications and are not expected to be routable on the global Internet.
According to latest RFC, unique local address is FD00::/8. Hence option should be D
Correct answer: B IANA actually reserves prefix FC00::/7, and not FD00::/8, for these addresses. FC00::/7 includes all addresses that begin with hex FC IPv6 Unique local address are in the block of FC00::/7 So , the pattern is composed of the bits that don´t change F - 1111 C - 1100 /7 - 1111110 Letter B Letter D is 11111101 - FD , not a Unique Local Address
AI said: Thank you for providing the search results. Based on the majority of search results, the correct answer to this question is B. 11111100, as it refers to the first 7 bits of an IPv6 Unique Local Address which have an exact binary pattern of 1111 1100
SOURCE: CCNA 200-301 Official Cert Guide Library - Volume1 page 551 > "IANA actually reserves prefix FC00::/7, and not FD00::/8, for these addresses. FC00::/7 includes all addresses that begin with hex FC and FD. However, an RFC (4193) requires the eighth bit of these addresses to be set to 1, which means that in practice today, the unique local addresses all begin with their first two digits as FD" Therefore, option D 11111101 (Hex FD) is the only correct answer
/7 - 1111110 Letter B *& Letter D*
B is correct
Having typed this into Copilot - under CCNA conditions What is the binary pattern of unique ipv6 unique local address? The answer is clear The ULA address range is divided into two halves: fc00::/8 (currently not defined) fd00::/8 The fd00::/8 range is used for unique local addresses. in binary terms, the unique local address (ULA) follows this pattern: Prefix: 1111 1101 (fd in hexadecimal) Global ID (random): xxxx xxxx xxxx xxxx (40 random bits) Subnet ID: yyyy yyyy yyyy yyyy (16 bits) Interface ID: zzzz zzzz zzzz zzzz (64 bits)
From Cisco´s point of view it should be FC00::/7, thus B
B is correct
https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.txt
B is correct
FC00::/7 is d reserved space for ULA BUT the 8th bit of that address space used for ULA must be 1 ( which is FD00::/8 which in bits means 11111101) while the address space of FC00::/7 whose 8th bit is 0 is reserved for future purposes (which is FC00::/8 which in bits means is 11111100). Don’t confuse FC00::/7 with FC00::/8. FC00::/7 means 1111110 (first 7 bits) is d network part and fixed while the 8th bit is part of the host address while FC00::/8 means 11111100 (the full FC00 which is 8 bits) is the network address and the fixed part. The main part that is ULA in FC00::/7 is the 11111101 part which is the FD00::/8. So the right answer is D. If B was 1111110, then it would have been correct too.
The binary pattern of a Unique Local Address (ULA) in IPv6 is determined by the prefix assigned to it. The prefix for Unique Local Addresses is fd00::/8. To represent the binary pattern of this prefix, we convert each hexadecimal digit to its corresponding 4-bit binary representation. In this case, the prefix fd would be represented as 11111101 in binary. Therefore, the correct answer is D: 11111101.
IPv6 Unique Local Addresses (ULAs) have a binary pattern of 11111100 at the start of the address. This corresponds to fc00::/7 in IPv6 notation. However, it’s worth noting that according to the standards defined by the Internet Engineering Task Force (IETF), only addresses from the fd00::/8 block (binary pattern 11111101) should be used for ULAs. This leaves the fc00::/8 block (binary pattern 11111100) reserved for future use.
b is correct 11111100
it´s B fc00::/8 (1111 1100): When the L flag is set to 0, may be defined in the future. fd00::/8 (1111 1101): When the L flag is set to 1, the address is locally assigned. The last bit is called the L bit. L=0 is not defined yet L=1 is locally specified the question is about "ipv6 unique local" so it´s FC00::/7 or 11111100 if the question was "locally specified ipv6 unique local" then we must answer FD00::/8 or 11111101
it´s B fc00::/7 (1111 1100): When the L flag is set to 0, may be defined in the future. fd00::/8 (1111 1101): When the L flag is set to 1, the address is locally assigned. The last bit is called the L bit. L=0 is not defined yet L=1 is locally specified the question is about "ipv6 unique local" so it´s FC00::/7 or 11111100 if the question was "locally specified ipv6 unique local" then we must answer FD00::/8 or 11111101
The binary pattern for a unique local IPv6 address is D. 11111101. This pattern corresponds to the first octet of an IPv6 address in binary form, where the first 7 bits are 1111110 and the 8th bit is set to 1 to indicate a locally unique address. This makes the first octet 11111101 in binary, which is used to distinguish unique local addresses (ULAs) from other types of IPv6 addresses. ULAs are defined in RFC 4193 and are intended for local communications within a site or between a limited number of sites and not expected to be routable on the global Internet.
According to Cisco the pattern for Unique local addresses is FC00. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/15-mt/ip6b-15-mt-book/ip6-uni-routing.html#GUID-75F9E53C-28B1-4B3F-B4D1-B2EA6A317A01
option D.
D he binary pattern of a unique IPv6 unique local address (ULA) is 11111101