220-1101 Router R1 Cannot Reach R3 Practice Questions

Common Traps on Router R1 Cannot Reach R3 Practice Questions

·Check both forward and return paths.
·A correct-looking route can still fail if the next hop is unreachable.
·Administrative distance and longest-prefix match can change which route is used.

Sample Questions

A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)

Explanation: An IP address starting with 169.254.x.x is an Automatic Private IP Addressing (APIPA) address, assigned when the DHCP server is unreachable. The technician should first attempt to renew the IP address (ipconfig /release and ipconfig /renew) to contact the DHCP server again. If that fails, the DHCP server itself or the network path to it should be checked. Checking the firewall or replacing the NIC are premature without first addressing the DHCP issue.

A workstation is connected to a managed switch. It obtains a valid IP address (192.168.10.50) from the DHCP server, but it cannot ping the default gateway (192.168.10.1). The link light on both the workstation NIC and the switch port are solid green. Other workstations on the same switch CAN ping the default gateway successfully. The technician accesses the switch management interface and finds that the workstation's port is configured as an access port on VLAN 10. The default gateway is located on VLAN 20. An inter-VLAN router is configured but not explicitly allowing VLAN 10 access to VLAN 20. Which of the following is the MOST likely cause of the problem?

Explanation: The workstation is assigned to VLAN 10 via the switch port configuration, but the default gateway is on a different VLAN (20). Without proper inter-VLAN routing (e.g., a router-on-a-stick with ACLs permitting traffic between VLANs), devices in VLAN 10 cannot reach the gateway on VLAN 20. The DHCP server provided an IP within VLAN 10's subnet, which is correct for that VLAN, but the gateway is in another subnet. The switch port VLAN assignment is the root cause; it should be on VLAN 20 to match the gateway, or inter-VLAN routing must be configured correctly.

A company hosts its e-commerce website on a public cloud platform. During the holiday shopping season, traffic increases dramatically. The cloud platform automatically adds more virtual server instances to handle the increased load and then removes them when traffic returns to normal. Which cloud computing characteristic does this scenario BEST describe?

Explanation: Rapid elasticity is the cloud characteristic that allows resources to be automatically and quickly scaled out (added) during periods of high demand and scaled in (removed) when demand decreases. This is a key benefit of cloud computing, enabling cost efficiency and performance without manual intervention. On-demand self-service refers to users provisioning resources without human interaction. Measured service involves monitoring and reporting usage. Resource pooling means multiple customers share the same physical infrastructure.

A company is developing a custom application that requires a specific Linux kernel version and full root access to install and configure third-party security modules. The company wants to minimize the management of physical infrastructure but needs complete control over the operating system environment, including the ability to modify kernel parameters. The cloud provider will be responsible for all underlying hardware and the hypervisor. Which cloud service model should the company choose?

Explanation: Infrastructure as a Service (IaaS) provides virtual machines where the customer has full control over the operating system, including kernel configuration and root access. The cloud provider manages only the physical hardware and virtualization layer. PaaS does not offer full OS control, and SaaS delivers ready-to-use applications. DBaaS is a subset that focuses only on database management.

A company deploys a stateless web application on multiple virtual machines in a public cloud behind a load balancer. The application experiences unpredictable traffic spikes. During a spike, the load balancer distributes requests evenly, but users report that they are randomly logged out or lose session data such as shopping cart contents. The application is designed to store session state locally on each server. Which of the following should the administrator implement to resolve this issue?

Explanation: The issue is that the load balancer is distributing requests from the same user across different backend VMs, but session data is stored locally on each server. When a user's request goes to a different VM, that VM does not have the user's session. Configuring sticky sessions (session affinity) ensures that all requests from a user during a session are directed to the same backend VM, preserving their session data. This is a direct fix that works with the existing local session storage. Alternatively, the application could be redesigned to use shared session storage (e.g., Redis), but sticky sessions are a simpler immediate solution.

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Frequently asked questions

How do "Router R1 Cannot Reach R3 Practice Questions" appear on the real 220-1101?

Practise routing and connectivity troubleshooting scenarios involving R1, R2, R3, static routes, OSPF, next hops and routing tables. These appear throughout the 220-1101 and require you to apply your knowledge, not just recall facts.

How many scenario questions are on the 220-1101 exam?

Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 220-1101. Practicing each scenario type ensures you're ready for any format.

Are these 220-1101 scenario practice questions free?

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