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Zorluk: OrtaIP Addressing and Network Configuration

A network technician is diagnosing host network configuration issues on a corporate network. Match each observed host diagnostic symptom on the left with its most likely underlying network cause on the right.

  • Workstation network adapter shows an IPv4 address of 169.254.112.45 with a 255.255.0.0 subnet mask.DHCP server is unreachable, causing automatic private IP address self-assignment.
  • Workstation can ping local IP addresses on its subnet but fails to resolve website domain names.DNS server IP address is missing or incorrectly configured in host network settings.
  • Workstation can communicate with other hosts on the 10.1.10.0/24 subnet but cannot send traffic to remote subnets.Default gateway IP address is missing or incorrectly configured on the network profile.
  • Workstation interface automatically assigns itself an address with the fe80:: prefix.IPv6 Link-Local unicast address auto-configuration for single-segment communications.

Cevap

Each host symptom correctly pairs with its configuration cause: an IP in 169.254.x.x matches APIPA from DHCP unreachability; hostname resolution failure with working local IP pings matches misconfigured DNS; inability to route past the local subnet matches misconfigured default gateway; and fe80:: prefix matches IPv6 Link-Local auto-configuration.
Each diagnostic state aligns with its core networking component: 169.254.x.x addresses indicate APIPA due to DHCP failure; domain resolution issues reflect missing DNS settings; inability to route past the local subnet indicates default gateway issues; and fe80:: addresses represent IPv6 link-local autoconfiguration.

Adım Adım Çözüm

1
Analyze the IP address range 169.254.112.45.
Identified as APIPA.
APIPA addresses are self-assigned in 169.254.0.0/16 when DHCP communication fails.
2
Evaluate local ping success paired with FQDN resolution failure.
Identified DNS failure.
IP routing functions locally, but domain name conversion requires active DNS server settings.
3
Evaluate intra-subnet communication versus inter-subnet routing failure.
Identified Default Gateway misconfiguration.
Traffic destined for external networks must be forwarded via the default gateway router.
4
Examine the IPv6 address prefix fe80::.
Identified IPv6 Link-Local scope.
Link-Local addresses begin with fe80:: and are auto-generated for local link traffic.

Anahtar Kavram

IP Addressing, Host Configuration Parameters, and Network Diagnostics
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