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Zorluk: Çok zorIP Addressing and Network Configuration

Match each host network configuration state and diagnostic output on the left with its correct underlying IP addressing or protocol diagnosis on the right.

  • A host receives an IPv4 address of 169.254.142.88 with subnet mask 255.255.0.0 and empty gateway and DNS entries.Automatic Private IP Addressing (APIPA) triggered due to DHCP server unreachability or scope exhaustion.
  • A host with static IP 10.0.4.15/24 can successfully ping 10.0.4.1, but pings to 10.0.5.15 return 'Destination host unreachable'.Misconfigured Default Gateway address or gateway subnet mismatch preventing off-subnet routing.
  • A host can successfully ping external IP 1.1.1.1 and internal servers by IP, but fails to load web pages using FQDNs.Invalid or non-responsive DNS Server IP configuration preventing hostname resolution.
  • A host generates an IPv6 address beginning with fe80::/10 and can only reach neighbor nodes on the local link.Non-routable IPv6 Link-Local auto-configuration active in the absence of a Router Advertisement for Global Unicast.

Cevap

1. APIPA IP assignment (169.254.x.x) corresponds to DHCP failure.
2. Inability to reach external subnets despite local connectivity corresponds to a default gateway issue.
3. Successful IP pings paired with failed FQDN lookup corresponds to a DNS server misconfiguration.
4. fe80:: IPv6 addressing corresponds to non-routable link-local auto-configuration.
Each IP parameter serves a distinct network role: APIPA (169.254.0.0/16) occurs when DHCP discovery fails; default gateways route traffic off the local subnet; DNS converts human-readable domain names into IP addresses; and IPv6 link-local addresses (fe80::/10) facilitate communication restricted strictly to the local physical link.

Adım Adım Çözüm

1
Analyze item 1 (169.254.142.88)
Identify the address block 169.254.0.0/16 as APIPA assigned when DHCP fails.
APIPA is a fallback mechanism used by operating systems when no response is received from a DHCP server.
2
Analyze item 2 (Local connectivity present, remote connectivity failing)
Determine that local traffic does not require a gateway, but cross-subnet traffic does.
When a host can ping intra-subnet IP addresses but fails to reach inter-subnet IP addresses, the default gateway configuration is incorrect or missing.
3
Analyze item 3 (Numeric IP ping succeeds, FQDN resolution fails)
Isolate the layer 7 name resolution component.
Direct IP communication proves network layer connectivity, leaving transport and application domain name mapping (DNS) as the root cause.
4
Analyze item 4 (fe80:: IPv6 address)
Match fe80::/10 to IPv6 link-local scope.
IPv6 link-local addresses enable local segment communication but cannot pass through routers without a Global Unicast Address.

Anahtar Kavram

Core IP Addressing Parameters and Diagnostic Symptomatic Analysis
Tahmini Süre:2m 0s
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Konular

IP Addressing and Network Configuration

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