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Zorluk: ZorIP Addressing and Network Configuration

A desktop workstation was recently relocated from the Finance department subnet (192.168.10.0/24192.168.10.0/24) to the Marketing department subnet (192.168.20.0/24192.168.20.0/24). A technician manually configured the network adapter with a static IPv4 address of 192.168.20.45192.168.20.45, a subnet mask of 255.255.255.0255.255.255.0, a default gateway of 192.168.10.1192.168.10.1, and a preferred DNS server of 192.168.10.5192.168.10.5. The workstation can ping adjacent computers on the local 192.168.20.0/24192.168.20.0/24 network, but users report they cannot reach internal servers on other subnets or access external internet resources. Which of the following configuration changes will resolve the workstation's reachability issue?

  1. Update the default gateway IPv4 address to an IP address within the 192.168.20.0/24192.168.20.0/24 subnet, such as 192.168.20.1192.168.20.1.Cevap
  2. B
    Reconfigure the preferred DNS server to issue a dynamic IPv4 address lease from the 192.168.20.0/24192.168.20.0/24 pool.
  3. C
    Connect an unmanaged Layer 2 switch to the wall jack to route traffic between the 192.168.10.0/24192.168.10.0/24 and 192.168.20.0/24192.168.20.0/24 subnets.
  4. D
    Modify the network adapter settings to change its default transport port assignment from port 80 to port 443.

Cevap

Update the default gateway IPv4 address to an IP address within the local 192.168.20.0/24192.168.20.0/24 subnet (e.g., 192.168.20.1192.168.20.1).
For a computer to reach destinations outside its local IP network, it must send traffic to a default gateway router located on its own subnet. Since the computer is on 192.168.20.0/24192.168.20.0/24, its default gateway must also have an IP address within the 192.168.20.0/24192.168.20.0/24 network block (such as 192.168.20.1192.168.20.1). Setting the default gateway to 192.168.10.1192.168.10.1 prevents the host from forwarding off-subnet traffic because the gateway IP address is not directly reachable on the local layer 2 segment.

Adım Adım Çözüm

1
Analyze host IP configuration and local subnet boundary.
The host interface has an IP address of 192.168.20.45192.168.20.45 with a /24/24 mask, placing it on the 192.168.20.0/24192.168.20.0/24 subnet (usable host range 192.168.20.1192.168.20.1 to 192.168.20.254192.168.20.254).
Devices can communicate directly with local hosts on the same subnet without routing.
2
Evaluate the configured default gateway.
The configured default gateway is 192.168.10.1192.168.10.1, which resides on a completely different subnet (192.168.10.0/24192.168.10.0/24).
A host cannot send packets directly to a gateway that does not exist within its local broadcast domain.
3
Determine the required remediation.
Change the default gateway to the local router interface address on the host's subnet (192.168.20.1192.168.20.1).
This allows remote-bound IP packets to be delivered to the local router interface for inter-subnet forwarding.

Anahtar Kavram

Default Gateway Subnet Alignment
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