7.7.5 Practice Questions

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2/17/24, 10 : 50 PM Individual Response Page 1 of 10 about:srcdoc 7.7.5 Practice Questions Candidate: Joseph Vincent (jvince13) Date: 2/17/2024, 10:50:19 PM • Time Spent: 02:15 Score: 100% Passing Score: 80% Question 1. Correct Which of the following best describes DHCP scope exhaustion? When a DHCP snooping technique is used to drop packets from untrusted DHCP servers. When an attacker adds a second DHCP server to a network and offers IP addresses to clients wanting to join the network. When IP address lease times on a DHCP server are shortened. A denial of service from a lack of IP addresses in a DHCP server's pool. Explanation
2/17/24, 10 : 50 PM Individual Response Page 2 of 10 about:srcdoc A denial of service from a lack of IP addresses in a DHCP server's pool is one form of DHCP scope exhaustion. Another form comes from inefficient IP address management in which the IP address pool is depleted faster than it can be refilled. A rogue DCHP server occurs when an attacker adds a second DHCP server to a network and offers IP addresses to client wanting to join the network. If the network administrator does not have control over a DHCP server, it is considered a rogue DHCP server. Shortening IP address lease times on a DHCP server can help prevent DHCP scope exhaustion. DHCP snooping techniques can help protect against rogue DHCP servers. References 7.7.1 Switching and Routing Troubleshooting (Part 1) 7.7.4 Switching and Routing Troubleshooting Facts 14.2.3 Common Network Issues 14.2.4 Common Network Issues Facts q_trouble_switching_routing_dhcp_np6.question.fex Question 2. Correct You have just connected a new computer to your network. The network uses static IP addressing. You find that the computer can communicate with hosts on the same subnet, but not with hosts on a different subnet. No other computers are having issues. Which of the following configuration values would you MOST likely need to change? DNS server Subnet mask IP address
2/17/24, 10 : 50 PM Individual Response Page 3 of 10 about:srcdoc IP address Default gateway Explanation You should check the computer's default gateway setting; this value is used to send packets to other subnets. If it's incorrect, packets won't be sent to the correct router. In this scenario, the host can communicate with other hosts on the same subnet, meaning that the IP address and subnet mask are correctly configured. The DNS server address is likely not the problem, as name resolution is not mentioned in the scenario. In addition, if name resolution were a problem, it could affect access to both local and remote hosts. References 7.7.4 Switching and Routing Troubleshooting Facts q_trouble_switching_routing_gateway_01_np6.question.fex Question 3. Correct A workstation's network board is currently configured as follows: Network Speed = Auto Duplexing = Auto The workstation is experiencing poor network performance, and you suspect that the
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2/17/24, 10 : 50 PM Individual Response Page 4 of 10 about:srcdoc network board is incorrectly detecting the network speed and duplex settings. Upon investigation, you find that it's running at 10 Mbps half-duplex. You know that your network switch is capable of much faster throughput. To fix this issue, you decide to manually configure these settings on the workstation. Before you do so, you need to verify the switch port configuration for the connected workstation. Given that it's a Cisco switch, which commands can you use on the switch to show a list of all switch ports and their current settings? (Select two.) show interface show running-config interface show interface switchport show interface ethernet counters show interface capabilities Explanation To view the speed and duplex settings of interfaces on a Cisco switch, you can use one of the following commands: show running-config interface (displays concise summary information) show interface (displays extended information) The show interface capabilities command displays information about interface capabilities, not the current switch configuration. The show interface ethernet counters command displays interface statistics. The show interface switchport command displays VLAN information regarding switch interfaces. References 7.7.1 Switching and Routing Troubleshooting (Part 1)
2/17/24, 10 : 50 PM Individual Response Page 5 of 10 about:srcdoc 7.7.1 Switching and Routing Troubleshooting (Part 1) 7.7.3 Troubleshoot Routing 7.7.4 Switching and Routing Troubleshooting Facts q_trouble_switching_routing_interface_np6.question.fex Question 4. Correct Which of the following utilities would you use to view the routing table? route mtr dig traceroute tracert Explanation Use the route command to display the routing table contents and to add or remove static routes. The tracert command uses ICMP packets to test connectivity between devices and display the path between them. Responses from each hop on the route are measured three times to provide an accurate representation of how long a packet takes to reach and be returned by that host. The mtr command on Linux is a combination of the ping and traceroute commands. The dig command resolves (looks up) a hostname's IP address. References 7.7.4 Switching and Routing Troubleshooting Facts
2/17/24, 10 : 50 PM Individual Response Page 6 of 10 about:srcdoc q_trouble_switching_routing_route_02_np6.question.fex Question 5. Correct You are unsure if the gateway address is correct for one of your subnetworks because traffic is not leaving the network. Which of the following tables could you look at to check if the gateway address is correct? Routing table State table MAC address table ARP table Explanation Routing tables contain gateway address information. MAC address tables, IP address tables, and state tables do not contain gateway address information. MAC address tables contain information about source MAC addresses and destination MAC addresses. ARP tables contain neighbor information and link MAC addresses to IP addresses. Stateful devices keep track of the state of network connections, like TCP streams in a state table. References 7.7.1 Switching and Routing Troubleshooting (Part 1) 7.7.4 Switching and Routing Troubleshooting Facts
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2/17/24, 10 : 50 PM Individual Response Page 7 of 10 about:srcdoc 14.2.4 Common Network Issues Facts q_trouble_switching_routing_route_03_np6.question.fex Question 6. Correct Which of the following scenarios would cause a problem in asymmetric routing? Using two stateful firewalls in the traffic flow. Using a hub in the traffic flow. Using two switches in the traffic flow. Using two routers in the traffic flow. Explanation When you have asymmetrical routing, the outbound traffic would go through one stateful firewall and the inbound traffic would come through the second stateful firewall. The second firewall would drop the packets because it wouldn't have any record of them in its state table. That information would be recorded in the first firewall. Unless you've specifically programmed a hub as stateful, it would not have problems with asymmetrical routing. In general, routers do not have problems with asymmetric routing, regardless of number. Switches do not have problems with asymmetric routing, regardless of number. References 7.7.1 Switching and Routing Troubleshooting (Part 1) 7.7.4 Switching and Routing Troubleshooting Facts q_trouble_switching_routing_stateful_np6.question.fex
2/17/24, 10 : 50 PM Individual Response Page 8 of 10 about:srcdoc Question 7. Correct You manage a network with multiple switches. You find that your switches are experiencing heavy broadcast storms. Which of the following will help reduce the effects of these broadcast storms? Disable auto-duplex detection. Enable Spanning Tree on the switches. Configure each switch with a single trunk port. Manually set the speed for each switch port. Explanation A broadcast storm is excessive broadcast traffic that renders normal network communications impossible. Broadcast storms can be caused by switching loops that cause broadcast traffic to be circulated endlessly or by denial of service (DoS) attacks. To reduce broadcast storms, you can: Run Spanning Tree protocol to prevent switching loops. Implement switches with built-in broadcast storm detection, which limits the bandwidth that broadcast traffic can use. Use VLANs to create separate broadcast domains on switches. References 7.7.4 Switching and Routing Troubleshooting Facts q_trouble_switching_routing_stp_np6.question.fex Question 8. Correct Which of the following can cause broadcast storms? Routing loops
2/17/24, 10 : 50 PM Individual Response Page 9 of 10 about:srcdoc Routing loops Duplicate MAC addresses Switching loops Duplicate IP addresses Explanation Switching loops can cause broadcast storms. The broadcast packets are forwarded to each port on each switch. The switches will then rebroadcast the packets endlessly and flood the network. Duplicate MAC addresses, duplicate IP addresses, and routing loops do not cause broadcast storms. References 7.7.1 Switching and Routing Troubleshooting (Part 1) 7.7.4 Switching and Routing Troubleshooting Facts q_trouble_switching_routing_switch_02_np6.question.fex Question 9. Correct You run a small network for your business that has a single router connected to the internet and a single switch. You keep sensitive documents on a computer that you would like to keep isolated from other computers on the network. Other hosts on the network should not be able to communicate with this computer through the switch, but you still need to access the network through the computer. What should you use for this situation? VPN VLAN Spanning Tree
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