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NEW QUESTION # 310
Which of the following best describes the transmission format that occurs at the transport layer over connectionless communication?
Answer: A
Explanation:
At the transport layer, connectionless communication is typically handled using the User Datagram Protocol (UDP), which transmits data in units called datagrams. Unlike TCP, UDP does not establish a connection before sending data and does not guarantee delivery, making datagrams the correct term for the transmission format in this context.
NEW QUESTION # 311
A systems administrator is looking for operating system information, running services, and network ports that are available on a server. Which of the following software tools should the administrator use to accomplish this task?
Answer: C
Explanation:
To identify a server's available network ports, running services, and often operating system details, the best tool listed is nmap. In the Network+ (N10-009) toolset, nmap is a standard utility used for network discovery and security assessment, including port scanning (which TCP/UDP ports are open), service enumeration (what application/service is listening on those ports), and service/version detection. With the appropriate scan options and permissions, nmap can also provide OS fingerprinting, which estimates the server's operating system by analyzing responses to crafted packets.
The other options do not meet all stated requirements. nslookup is used for DNS queries (name-to-IP and record lookups) and does not enumerate ports/services. traceroute (or tracert) maps the path packets take through the network to a destination and helps diagnose routing/latency issues, not services/ports. netstat shows local socket statistics on the host where it is executed (active connections, listening ports, and interface stats), but it does not reliably provide remote OS identification and is not a dedicated service/OS enumeration scanner like nmap.
Therefore, nmap is the correct tool to accomplish the task as described.
NEW QUESTION # 312
An attack on an internal server is traced to an isolated guest network. Which of the following best describes the attack?
Answer: A
Explanation:
The correct answer is VLAN hopping, which is a Layer 2 attack specifically associated with bypassing network segmentation controls. According to the CompTIA Network+ N10-009 objectives, VLANs are commonly used to isolate traffic between different network segments, such as separating a guest network from internal production systems. When an attack originates from an isolated guest network and successfully reaches an internal server, it strongly indicates a failure or exploitation of VLAN boundaries.
VLAN hopping occurs when an attacker gains access to traffic on another VLAN by exploiting misconfigured switch ports or trunking protocols. Common techniques include switch spoofing, where the attacker pretends to be a switch to negotiate a trunk link, and double-tagging, where two VLAN tags are inserted to trick switches into forwarding traffic across VLANs.
The other options do not best fit this scenario. An on-path (man-in-the-middle) attack requires interception between two communicating hosts but does not inherently bypass VLAN isolation. DNS poisoning manipulates name resolution, not network segmentation. ARP spoofing affects local Layer 2 address resolution within the same broadcast domain and typically cannot cross VLAN boundaries.
The Network+ objectives emphasize proper VLAN configuration, disabling unused trunk ports, and implementing port security to prevent VLAN hopping attacks. In this case, VLAN hopping most accurately explains how a guest network could access internal servers.
NEW QUESTION # 313
A network administrator wants to increase network security by preventing client devices from communicating directly with each other on the same subnet. Which of the following technologies should be implemented?
Answer: B
Explanation:
Private VLANs (PVLANs)are used tosegment devices on the same subnetand switch so they cannot communicate with each other, while still accessing a shared resource like a router or gateway. This is often used in shared hosting or DMZ environments.
* A. ACLs (Access Control Lists)control traffic between networks, not within the same VLAN.
* B. Trunkingcarries multiple VLANs between switches but does not isolate devices.
* C. Port securitylimits MAC addresses per port but doesn't isolate communication between ports.
#Reference:
CompTIA Network+ N10-009 Official Objectives: 3.4 - Compare and contrast access control methods.
NEW QUESTION # 314
A network administrator has been taskedwith configuring a network for a newcorporate office. The office consists of twobuildings, separated by 50 feet with nophysical connectivity. The configuration mustmeet the following requirements:
. Devices in both buildings should be
able to access the Internet.
. Security insists that all Internet traffic
be inspected before entering the
network.
. Desktops should not see traffic
destined for other devices.
INSTRUCTIONS
Select the appropriate network device foreach location. If applicable, click on themagnifying glass next to any device whichmay require configuration updates and makeany necessary changes.
Not all devices will be used, but all locationsshould be filled.
If at any time you would like to bring backthe initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
See the step by step complete solution below.
Explanation:
* Devices in both buildings should be able to access the Internet.
* Security insists that all Internet traffic be inspected before entering the network.
* Desktops should not see traffic destined for other devices.
Here is the corrected layout with explanation:
* Building A:
* Switch: Correctly placed to connect all desktops.
* Firewall: Correctly placed to inspect all incoming and outgoing traffic.
* Building B:
* Switch: Not needed. Instead, place aWireless Access Point (WAP)to provide wireless connectivity for laptops and mobile devices.
* Between Buildings:
* Wireless Range Extender: Correctly placed to provide connectivity between the buildings wirelessly.
* Connection to the Internet:
* Router: Correctly placed to connect to the Internet and route traffic between the buildings and the Internet.
* Firewall: The firewall should be placed between the router and the internal network to inspect all traffic before it enters the network.
* Top-left (Building A): Switch
* Bottom-left (Building A): Firewall (inspect traffic before it enters the network)
* Top-middle (Internet connection): Router
* Bottom-middle (between buildings): Wireless Range Extender
* Top-right (Building B): Wireless Access Point (WAP)
Corrected Setup:In this corrected setup, the WAP in Building B will connect wirelessly to the Wireless Range Extender, which is connected to the Router. The Router is connected to the Firewall to ensure all traffic is inspected before it enters the network.
* SSID: CORP
* Security Settings: WPA2 or WPA2 - Enterprise
* Key or Passphrase: [Enter a strong passphrase]
* Mode: [Set based on your network plan]
* Channel: [Set based on your network plan]
* Speed: Auto
* Duplex: Auto
Configuration for Wireless Range Extender:With these settings, both buildings will have secure access to the Internet, and all traffic will be inspected by the firewall before entering the network. Desktops and other devices will not see traffic intended for others, maintaining the required security and privacy.
Uploaded image
To configure the wireless range extender for security, follow these steps:
* SSID (Service Set Identifier):
* Ensure the SSID is set to "CORP" as shown in the exhibit.
* Security Settings:
* WPA2orWPA2 - Enterprise: Choose one of these options for stronger security.
WPA2-Enterprise provides more robust security with centralized authentication, which is ideal for a corporate environment.
* Key or Passphrase:
* If you selectWPA2, enter a strong passphrase in the "Key or Passphrase" field.
* If you selectWPA2 - Enterprise, you will need to configure additional settings for authentication servers, such as RADIUS, which is not shown in the exhibit.
* Wireless Mode and Channel:
* Set the appropriate mode and channel based on your network design and the environment to avoid interference. These settings are not specified in the exhibit, so set them according to your network plan.
* Wired Speed and Duplex:
* Set the speed to "Auto" unless you have specific requirements for 100 or 1000 Mbps.
* Set the duplex to "Auto" unless you need to specify half or full duplex based on your network equipment.
* Save Configuration:
* After making the necessary changes, click the "Save" button to apply the settings.
Here is how the configuration should look after adjustments:
* SSID: CORP
* Security Settings: WPA2 or WPA2 - Enterprise
* Key or Passphrase: [Enter a strong passphrase]
* Mode: [Set based on your network plan]
* Channel: [Set based on your network plan]
* Speed: Auto
* Duplex: Auto
Once these settings are configured, your wireless range extender will provide secure connectivity for devices in both buildings.
Firewall setting toto ensure complete compliance with the requirements and best security practices, consider the following adjustments and additions:
* DNS Rule: This rule allows DNS traffic from the internal network to any destination, which is fine.
* HTTPS Outbound: This rule allows HTTPS traffic from the internal network (assuming
192.169.0.1/24 is a typo and should be 192.168.0.1/24) to any destination, which is also good for secure
* web browsing.
* Management: This rule allows SSH access to the firewall for management purposes, which is necessary for administrative tasks.
* HTTPS Inbound: This rule denies inbound HTTPS traffic to the internal network, which is good unless you have a web server that needs to be accessible from the internet.
* HTTP Inbound: This rule denies inbound HTTP traffic to the internal network, which is correct for security purposes.
* Permit General Outbound Traffic: Allow general outbound traffic for web access, email, etc.
* Block All Other Traffic: Ensure that all other traffic is blocked to prevent unauthorized access.
* Correct the Network Typo:
* Ensure that the subnet192.169.0.1/24is corrected to192.168.0.1/24.
* Permit General Outbound Traffic:
* Rule Name: General Outbound
* Source:192.168.0.1/24
* Destination:ANY
* Service:ANY
* Action:PERMIT
* Deny All Other Traffic:
* Rule Name: Block All
* Source:ANY
* Destination:ANY
* Service:ANY
* Action:DENY
Suggested Additional Settings:Firewall Configuration Adjustments:Here is how your updated firewall settings should look:
Rule Name
Source
Destination
Service
Action
DNS Rule
192.168.0.1/24
ANY
DNS
PERMIT
HTTPS Outbound
192.168.0.1/24
ANY
HTTPS
PERMIT
Management
ANY
192.168.0.1/24
SSH
PERMIT
HTTPS Inbound
ANY
192.168.0.1/24
HTTPS
DENY
HTTP Inbound
ANY
192.168.0.1/24
HTTP
DENY
General Outbound
192.168.0.1/24
ANY
ANY
PERMIT
Block All
ANY
ANY
ANY
DENY
These settings ensure that:
* Internal devices can access DNS and HTTPS services externally.
* Management access via SSH is permitted.
* Inbound HTTP and HTTPS traffic is denied unless otherwise specified.
* General outbound traffic is allowed.
* All other traffic is blocked by default, ensuring a secure environment.
Make sure to save the settings after making these adjustments.
NEW QUESTION # 315
......
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