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A network capture on an Ethernet segment contains packets for ff02::2. Which interpretation of that IPv6 destination is correct?
FF02 denotes link-local multicast scope; ::2 is the well-known all-routers group, used by on-link IPv6 control traffic such as router solicitation.
FF00::/8 is multicast, not global unicast or anycast; the group is not routable beyond the link.
The all-nodes link-local group is ff02::1. FF02::2 targets routers that have joined the all-routers group.
The unspecified address is ::/128 and cannot function as a multicast destination.
An IPv6 workstation uses SLAAC to configure its /64 LAN address and learns a default route through a router's link-local address. Which message normally advertises that router as the default gateway?
IPv6 Router Advertisements provide prefix and default-router information for SLAAC hosts; the router's link-local address is the next hop used for that route.
DHCPv4 options describe IPv4 addressing and do not signal the IPv6 default-router lifetime.
An AAAA DNS record maps a name to an IPv6 host address, not to the local IPv6 default router.
Neighbor Solicitation supports address resolution and reachability; it does not announce default-router policy to hosts.
At a warehouse, an implementation partner has been allocated documented IPv6 LAN prefix 2001:db8:47d8:d5::/64. Which candidate interface address and prefix length preserves that allocation?
2001:db8:47d8:d5::1f/64 is a host address inside 2001:db8:47d8:d5::/64 with the site /64 prefix intact. The /64 length is consistent with this LAN addressing requirement.
2001:db8:47d8:d6::20/64 changes the fourth hextet and lies in a different /64. Subnet identity includes all four initial hextets in 2001:db8:47d8:d5::/64.
2001:db8:47d8:d5::84/48 describes a /48 aggregate rather than the designated /64 interface prefix. Assigning an interface a different prefix length changes on-link assumptions.
2001:db8:47d8:d5::1b/128 applies a /128 host prefix rather than the /64 LAN prefix. A /128 is useful for a host route but not the requested LAN interface representation.
An organization uses fd12:3456:789a::/48 for internal services. What is the most accurate classification of this addressing space?
IPv6 addresses in fc00::/7 are unique-local; a locally assigned prefix normally begins with fd. Private internal use does not turn the range into link-local multicast.
Unique-local prefixes are not intended for global Internet routing, even though they are unicast.
The loopback address is exactly ::1/128, not an fd-prefixed network.
Link-local IPv6 uses fe80::/10 and remains on the same link; this fd prefix has different scope.
A host has IPv6 address 2001:db8:44:2:ffff::10/64. A technician proposes 2001:db8:44:3::1 as the on-link server. Which statement is correct without a router?
For a /64, the first four hextets form the network prefix. The fourth hextet differs (2 versus 3), so communication requires routing or an explicit unusual on-link configuration.
The fourth hextet is part of a /64 prefix and must also match for same-prefix membership.
The interface ID is the lower 64 bits; the first 64 bits establish the network prefix.
2001:db8::/32 is documentation global-unicast-style space; it does not have link-local fe80 scope.
At a customer support center, a network administrator has been allocated documented IPv6 LAN prefix 2001:db8:1d24:12a::/64. Which candidate interface address and prefix length preserves that allocation?
2001:db8:1d24:12a::4b/64 is a host address inside 2001:db8:1d24:12a::/64 with the site /64 prefix intact. The /64 length is consistent with this LAN addressing requirement.
2001:db8:1d24:12b::20/64 changes the fourth hextet and lies in a different /64. Subnet identity includes all four initial hextets in 2001:db8:1d24:12a::/64.
2001:db8:1d24:12a::b6/48 describes a /48 aggregate rather than the designated /64 interface prefix. Assigning an interface a different prefix length changes on-link assumptions.
2001:db8:1d24:12a::8e/128 applies a /128 host prefix rather than the /64 LAN prefix. A /128 is useful for a host route but not the requested LAN interface representation.
At a design agency, a network operations engineer has been allocated documented IPv6 LAN prefix 2001:db8:1f91:1b7::/64. Which candidate interface address and prefix length preserves that allocation?
2001:db8:1f91:1b7::42/64 is a host address inside 2001:db8:1f91:1b7::/64 with the site /64 prefix intact. The /64 length is consistent with this LAN addressing requirement.
2001:db8:1f91:1b7::6c/48 describes a /48 aggregate rather than the designated /64 interface prefix. Assigning an interface a different prefix length changes on-link assumptions.
2001:db8:1f91:1b8::20/64 changes the fourth hextet and lies in a different /64. Subnet identity includes all four initial hextets in 2001:db8:1f91:1b7::/64.
2001:db8:1f91:1b7::18/128 applies a /128 host prefix rather than the /64 LAN prefix. A /128 is useful for a host route but not the requested LAN interface representation.
An IPv6 host successfully configures a global unicast address with SLAAC and learns a default gateway. What source normally supplies that default router information?
IPv6 Neighbor Discovery router advertisements communicate router availability and prefix information. The host can use the advertising router’s link-local source as its default next hop.
IPv4 DHCP option 3 is an IPv4 router option; IPv6 SLAAC uses ICMPv6 router advertisements.
Even where DHCPv6 supplies other configuration, Router Advertisements provide the default-router information in normal SLAAC operation.
A native VLAN governs how untagged Ethernet frames are handled, not how IPv6 hosts learn routers.
At a logistics provider, the campus network lead has been allocated documented IPv6 LAN prefix 2001:db8:268:1bd::/64. Which candidate interface address and prefix length preserves that allocation?
2001:db8:268:1bd::1a/64 is a host address inside 2001:db8:268:1bd::/64 with the site /64 prefix intact. The /64 length is consistent with this LAN addressing requirement.
2001:db8:268:1bd::b4/128 applies a /128 host prefix rather than the /64 LAN prefix. A /128 is useful for a host route but not the requested LAN interface representation.
2001:db8:268:1be::20/64 changes the fourth hextet and lies in a different /64. Subnet identity includes all four initial hextets in 2001:db8:268:1bd::/64.
2001:db8:268:1bd::9/48 describes a /48 aggregate rather than the designated /64 interface prefix. Assigning an interface a different prefix length changes on-link assumptions.
At a satellite office, a network administrator needs to identify a globally routable IPv6 unicast prefix rather than an interface link-local source. Which choice best addresses the stated requirement?
Global unicast normally falls under 2000::/3; 2001:db8::/32 is reserved specifically for examples.
FF00 identifies IPv6 multicast groups.
FE80 is link-local and is not routed beyond the link.
::1 is IPv6 loopback.
At a research campus, a network operations engineer must choose an IPv6 source for neighbor discovery on one local Ethernet segment. Which choice best addresses the stated requirement?
Neighbor discovery relies on link-local addresses within a link scope.
Multicast represents a group destination, not a host source.
The source field expects a 128-bit IPv6 address.
The unspecified address is only used in restricted initialization cases, not as stable host identity.
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