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Zorluk: OrtaIPv6 Addressing and Deployment

A network administrator is implementing IPv6 addressing and client deployment mechanisms on an enterprise VLAN segment. Which of the following statements regarding IPv6 address formatting, DNS resolution, and autoconfiguration are correct? (Select TWO.)

  1. The link-local address prefix fe80::/10 allows hosts and interfaces to communicate across the immediate physical or logical link segment independently of global unicast prefix assignments.Cevap
  2. Stateless Address Autoconfiguration (SLAAC) enables client hosts to dynamically learn their network prefix and default gateway configuration from ICMPv6 Router Advertisement messages.Cevap
  3. C
    The address string 2001:db8::cafe::1 is a valid RFC 5952 compressed format for an IPv6 global unicast address containing multiple contiguous zero hextets.
  4. D
    Enterprise DNS servers require standard host A records to map client domain names to newly configured 128-bit IPv6 global unicast addresses.

Cevap

Link-local addresses (fe80::/10) allow link-scoped communication without global unicast configuration, and SLAAC relies on ICMPv6 Router Advertisements to deliver subnet prefix and default gateway info to hosts.
The link-local address range (fe80::/10) enables host communication over the local layer 2 segment without requiring a global unicast address or internet routing. Additionally, SLAAC uses ICMPv6 Router Advertisement messages sent by routers to supply hosts with the subnet prefix, prefix length, and default gateway information needed to generate their own IPv6 addresses.

Adım Adım Çözüm

1
Analyze link-local address scope characteristics
Confirm that fe80::/10 link-local addresses are automatically derived/assigned and function on the local link independently of global routing configurations.
IPv6 nodes require link-local addresses for Neighbor Discovery Protocol (NDP) and local segment messaging regardless of global unicast routing status.
2
Evaluate SLAAC mechanism operations
Confirm that SLAAC uses ICMPv6 Type 134 (Router Advertisement) messages broadcast by routers to dynamically inform client hosts of the network prefix, prefix length, and default gateway.
SLAAC provides stateless IP address autoconfiguration without needing a centralized DHCPv6 stateful lease server.
3
Inspect distractor option regarding zero-compression syntax
Identify that 2001:db8::cafe::1 contains two sets of double colons (::), which violates RFC 5952.
The double colon operator can only be used once per address because multiple occurrences prevent determining how many zero hextets each double colon represents.
4
Inspect distractor option regarding DNS record types
Identify that A records resolve IPv4 hostnames, whereas AAAA records are mandatory for IPv6 resolution.
IPv6 addresses require 128-bit AAAA resource records in DNS zones.

Anahtar Kavram

IPv6 Address Scoping, SLAAC Autoconfiguration, and RFC 5952 Syntax Rules
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IPv6 Addressing and Deployment

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