N10-008 Exam Dumps - CompTIA Network+ Questions and Answers

Tailgating is a type of physical security attack where an unauthorized person follows an authorized person into a restricted area without their consent or knowledge. Tailgating can allow an attacker to bypass security measures and gain access to sensitive information or resources. In this scenario, the technician experienced tailgating when the unknown individual walked in behind the technician without speaking. Piggybacking is similar to tailgating, but it involves the consent or cooperation of the authorized person. Evil twin is a type of wireless network attack where an attacker sets up a rogue access point that mimics a legitimate one. On-path is a type of network attack where an attacker intercepts and modifies traffic between two parties.

References: CompTIA Network+ Certification Exam Objectives Version 7.0 (N10-007), Objective 3.2: Given a scenario, use appropriate network hardening techniques.

East-West traffic refers to data flows between servers or devices within the same datacenter. When a hosted virtual server is duplicated to another physical server for redundancy, it generates significant East-West traffic as the data is replicated between the two servers. References:

• Network+ N10-008 Objectives: 3.3 Given a scenario, implement secure network architecture concepts.

The subnet mask is a binary value that defines how many bits of an IP address are used to identify the network and how many bits are used to identify the host. The subnet mask also determines the size and number of subnets in a network. The ipconfig command shows the current IP configuration of a device, including the subnet mask. In this case, the subnet mask is misconfigured because it does not match the network address of the device. The device has an IP address of 192.168.1.55, which belongs to the network 192.168.1.0/24 (with a subnet mask of 255.255.255.0). However, the subnet mask is set to 225.225.225.224, which is an invalid value that does not correspond to any network prefix length. This causes the device to be unable to communicate with other devices on the same network or access the default gateway. References: CompTIA Network+ N10-008 Certification Study Guide, page 109; The Official CompTIA Network+ Student Guide (Exam N10-008), page 5-4.

https://www.omnisecu.com/cisco-certified-network-associate-ccna/three-tier-hierarchical-network-model.php

Core Layer consists of biggest, fastest, and most expensive routers with the highest model numbers and Core Layer is considered as the back bone of networks. Core Layer routers are used to merge geographically separated networks. The Core Layer routers move information on the network as fast as possible. The switches operating at core layer switches packets as fast as possible.

• The question asks about the most likely cause of a switchport sharing issue on a Layer 2 switch.
• The answer is not A, because Spanning Tree Protocol (STP) is a protocol that prevents loops in a switched network by blocking redundant links. It does not affect the ability of users to connect to a switchport, unless the port is in a blocking state due to a loop detection.
• The answer is not B, because VLAN trunking is a method of carrying multiple VLANs over a single link, such as a switchport. It does not prevent users from connecting to a switchport, unless the port is configured with an incompatible trunking protocol or VLAN ID.
• The answer is not D, because Dynamic ARP Inspection (DAI) is a security feature that validates ARP packets and prevents ARP spoofing attacks. It does not block users from connecting to a switchport, unless the port is configured with an incorrect IP-MAC binding or DHCP snooping database.
• The answer is C, because port security is a security feature that limits the number and type of MAC addresses that can access a switchport. It can prevent users from connecting to a switchport, if the port is configured with a maximum MAC address limit that is reached by the first user, or with a static MAC address that does not match the subsequent users.

References:

• : CompTIA Network+ N10-008 Study Guide, Chapter 3: Network Components, Section 3.1: Network Devices, p. 125
• : CompTIA Network+ N10-008 Study Guide, Chapter 3: Network Components, Section 3.1: Network Devices, p. 126
• : CompTIA Network+ N10-008 Study Guide, Chapter 3: Network Components, Section 3.1: Network Devices, p. 128
• : CompTIA Network+ N10-008 Study Guide, Chapter 6: Network Security, Section 6.3: Network Security Devices and Technologies, p. 342

• The question asks about the type of connection that would need to be set up to provide access from the internal network to an external network so multiple satellite offices can communicate securely using various ports and protocols.
• A connection is a logical or physical link between two or more devices or networks that allows data transmission and exchange.
• There are different types of connections that can be used for different purposes and scenarios, such as:
• In this scenario, the best type of connection to use is a site-to-site VPN, because it can provide the following benefits:
• Therefore, the answer is D, a site-to-site VPN, as it can provide access from the internal network to an external network so multiple satellite offices can communicate securely using various ports and protocols.

References:

• CompTIA Network+ N10-008 Study Guide, Chapter 4: Network Security, Section 4.2: Secure Network Design, Pages 204-207
• Professor Messer’s CompTIA N10-008 Network+ Course, Video 4.2: Secure Network Design, Part 2
• Network + N10-008 practice exam, Question 267, Answer D, Explanation

A cable was looped and created a broadcast storm is the most likely explanation for the symptoms of high CPU usage and blinking lights on the switch. A cable loop is a situation where a switch port is connected to another switch port on the same switch or another switch, creating a circular path for network traffic. A cable loop can cause a broadcast storm, which is a network phenomenon where a large number of broadcast or multicast packets are flooded on the network, consuming bandwidth and CPU resources. A broadcast storm can cause network congestion, performance degradation, or failure. A cable loop can occur when an employee rearranges the wiring closet without proper documentation or verification. A cable loop can be prevented or detected by using Spanning Tree Protocol (STP) or loop detection features on the switch. References: [CompTIA Network+ Certification Exam Objectives], What Is a Broadcast Storm? | Definition & Examples | Forcepoint

In this case, the most likely cause of the constant disconnections when moving from one location to another is likely due to a problem with the roaming functionality of the wireless network. The setting that would likely provide better network stability in this situation is the RSSI roaming threshold, which determines the signal strength required for a client device to remain connected to the wireless network. If the roaming threshold is set too low, the client device may disconnect and reconnect to the network too frequently as it moves between different access points. On the other hand, if the threshold is set too high, the client device may not roam to a new access point when necessary, leading to a loss of connectivity. Adjusting the RSSI roaming threshold to an appropriate value may help to improve the stability of the wireless network in this situation.

A link-state algorithm is a routing algorithm that uses information about the state of each link in the network to calculate the shortest path from one node to every other node. A link-state algorithm requires each router to maintain a complete map of the network topology and exchange link-state advertisements with its neighbors periodically or when a change occurs. A link-state algorithm uses a mathematical formula called Dijkstra’s algorithm to find the shortest path based on the link costs. A link-state algorithm provides the fastest convergence time because it can quickly detect and adapt to network changes. References: [CompTIA Network+ Certification Exam Objectives], [Link-state routing protocol - Wikipedia]

The issue is that the host is configured with incorrect DNS settings. DNS (Domain Name System) is a service that resolves domain names to IP addresses. For example, the domain name www.comptia.org is resolved to the IP address 104.18.25.140 by a DNS server. If the host has incorrect DNS settings, such as an invalid or unreachable DNS server address, it will not be able to resolve domain names to IP addresses, and therefore it will not be able to access websites by their names. The output in the image shows that the host can ping the IP address of www.comptia.org, but it cannot ping the domain name itself, indicating a DNS problem.  References: CompTIA Network+ N10-008 Certification Study Guide, page 154; The Official CompTIA Network+ Student Guide (Exam N10-008), page 6-8.

• The question describes a scenario where a network event is causing all communication to stop, and the network administrator can only access the switch using the serial console port, not SSH.
• This suggests that the problem is related to the network layer or below, as SSH operates at the application layer and requires network connectivity to function.
• The port statistics show a huge discrepancy between the total receive and transmit rates, as well as the unicast and broadcast/multicast packets per second. This indicates that there is a lot of traffic being generated and forwarded within the network, but not reaching the intended destinations.
• The most likely cause of this excessive traffic is a switch loop, which occurs when there are multiple paths between switches that create a circular flow of data. Switch loops can cause broadcast storms, MAC address table instability, and network congestion, leading to network outages.
• To verify this, the network administrator should use a tool such as Spanning Tree Protocol (STP), which is designed to prevent and detect switch loops by blocking redundant links and electing a root bridge. STP can also provide information about the topology and status of the network, such as the root port, designated port, and blocked port for each switch. References:
• CompTIA Network+ N10-008 Study Guide, Chapter 2, Section 2.3, Switching Technologies, page 741
• Professor Messer’s CompTIA N10-008 Network+ Course Notes, Section 2.3, Switching Technologies, page 132
• Professor Messer’s CompTIA N10-008 Network+ Training Course, Video 2.3 - Switching Technologies, 12:00 - 14:003

802.1Q configuration is the most likely cause of the issue where a switch interface is not forwarding frames on a trunked port. 802.1Q is a standard that defines how to create and manage virtual LANs (VLANs) on a switched network. VLANs are logical segments of a network that group devices based on criteria such as function, department, or security level. VLANs can improve network performance, security, and manageability by reducing broadcast domains, isolating traffic, and enforcing policies. A trunked port is a switch port that can carry traffic from multiple VLANs over a single physical link by adding a VLAN tag to each frame. A VLAN tag is a 4-byte header that identifies the VLAN ID and priority of each frame. A trunked port requires 802.1Q configuration to specify which VLANs are allowed or disallowed on the port, and which VLAN is the native or untagged VLAN. If the 802.1Q configuration is incorrect or mismatched between switches, frames may be dropped or misrouted on the trunked port. References: [CompTIA Network+ Certification Exam Objectives], VLAN Trunking Protocol (VTP) Explained | NetworkLessons.com

The availability concept that the network technician should consider when selecting new network hardware is RTO (Recovery Time Objective). RTO is a metric that defines the maximum acceptable time for restoring a system or service after a disruption or failure. RTO is based on the impact and cost of downtime for the business and its customers. RTO helps determine the level of redundancy and backup needed for network hardware to ensure high availability and minimize downtime. References: CompTIA Network+ N10-008 Certification Study Guide, page 346; The Official CompTIA Network+ Student Guide (Exam N10-008), page 13-9.

The network administrator should check the roaming settings on the APs and WLAN clients first. Roaming is the process of switching from one AP to another without losing connectivity. If the roaming settings are not configured properly, some users may experience poor connectivity when their devices stay connected to a distant AP instead of switching to a closer one. References: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/82068-roam-faq.html

A reservation should be configured to ensure a device with a specific MAC address is always assigned the same IP address from DHCP. A reservation is a feature of DHCP that allows an administrator to assign a fixed IP address to a device based on its MAC address. This way, the device will always receive the same IP address from the DHCP server, even if it is powered off or disconnected from the network for a long time. References: https://docs.microsoft.com/en-us/windows-server/troubleshoot/configure-dhcp-reservations