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| Section | Objectives |
|---|---|
| Network Implementation | - Network storage and virtualization - Routing technologies - Wireless networking - Switching technologies |
| Networking Concepts | - IPv4 and IPv6 addressing - Ports, protocols, and services - Network topologies and types (LAN, WAN, WLAN) - OSI model and TCP/IP model |
| Network Security | - Access control and authentication - Network hardening techniques - Security concepts and threats |
| Network Operations | - Business continuity and disaster recovery - Monitoring and optimization - Network documentation and diagrams |
| Network Troubleshooting | - Common network issues - Troubleshooting methodology - Tools and diagnostic techniques |
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NEW QUESTION # 447
Computer A cannot reach Computer B in the following network:
Computer A: 172.16.2.10/16
Computer B: 172.16.4.10/16
Switch A:
Gi0/1 access VLAN 1, status up/up
Gi0/9 access VLAN 8, status up/up
Gi0/10 access VLAN 5, status administratively down
Switch B:
Gi0/1 access VLAN 1, status up/up
Gi0/9 access VLAN 8, status up/up
Gi0/10 access VLAN 5, status administratively down
Which of the following will resolve the issue?
Answer: D
Explanation:
The correct solution is to establish a trunk connection between Switch A and Switch B. Computer A and Computer B are both connected to access VLAN 1 on their local switches. However, the inter-switch link appears to be configured as an access port in VLAN 8. Because the link between the switches is not carrying VLAN 1 traffic, devices in VLAN 1 on separate switches cannot communicate across that connection.
The CompTIA Network+ N10-009 objectives include VLANs, switching, trunking, access ports, and troubleshooting Layer 2 connectivity. Access ports carry traffic for a single VLAN. Trunk ports carry traffic for multiple VLANs between switches, usually using tagging such as IEEE 802.1Q. To allow VLAN 1 devices on both switches to communicate, the inter-switch connection must carry VLAN 1 traffic. A trunk would allow VLAN 1 and other required VLANs to pass between the switches.
Link aggregation is not the issue, and Gi0/10 is administratively down. Spanning Tree Protocol prevents loops but does not fix missing VLAN transport. Changing both hosts to a /24 would not solve the VLAN separation problem and could make IP reachability worse. Therefore, trunking is required.
NEW QUESTION # 448
A customer wants to cache commonly used content to reduce the number of full page downloads from the internet. Which of the following should the network administrator recommend?
Answer: C
Explanation:
Comprehensive and Detailed Explanation (paraphrased, aligned to N10-009):
A proxy server (specifically a caching HTTP/HTTPS proxy) stores frequently accessed web objects and serves them locally to clients, reducing external bandwidth consumption and improving response times.
B). Load balancer distributes traffic across servers but does not inherently cache internet content.
C). Open relay is a misconfigured mail server that permits unauthorized relaying-this is a security issue, not a caching solution.
D). Code repository (e.g., for source control) isn't related to web content caching.
References (CompTIA Network+ N10-009):
Domain: Network Standards, Protocols, and Implementations - Application-layer services (HTTP/HTTPS), proxies and caching behavior, performance optimization.
NEW QUESTION # 449
A systems administrator needs to connect two laptops to a printer via Wi-Fi. The office does not have access points and cannot purchase any. Which of the following wireless network types best fulfills this requirement?
Answer: C
Explanation:
Comprehensive and Detailed Explanation (aligned to N10-009):
An ad hoc wireless network allows devices to connect directly to each other without an access point. This is suitable for small, temporary setups like two laptops and a printer.
A). Mesh requires multiple nodes forming a larger distributed network.
B). Infrastructure requires an AP, which is not available here.
D). Point-to-point is typically for long-distance wireless links between two fixed endpoints.
References (CompTIA Network+ N10-009):
Domain: Networking Concepts - Wireless network types: infrastructure, ad hoc, mesh.
NEW QUESTION # 450
A network administrator is configuring a wireless network with an ESSID. Which of the following is a user benefit of ESSID compared to SSID?
Answer: A
Explanation:
An Extended Service Set Identifier (ESSID) allows multiple access points to share the same SSID, enabling seamless roaming for users. This means that users can move between different access points within the same ESSID without losing connection or having to reauthenticate. This provides a better user experience, especially in large environments such as office buildings or campuses.
NEW QUESTION # 451
A network administrator needs to change where the outside DNS records are hosted. Which of the following records should the administrator change the registrar to accomplish this task?
Answer: A
Explanation:
To change where the outside DNS records are hosted, the network administrator needs to update the NS (Name Server) records at the domain registrar. NS records specify the authoritative name servers for a domain, directing where DNS queries should be sent.
NS (Name Server) Records: These records indicate the servers that are authoritative for a domain. Changing the NS records at the registrar points DNS resolution to the new hosting provider.
SOA (Start of Authority): Contains administrative information about the domain, including the primary name server.
PTR (Pointer) Records: Used for reverse DNS lookups, mapping IP addresses to domain names.
CNAME (Canonical Name) Records: Used to alias one domain name to another, not relevant for changing DNS hosting.
NEW QUESTION # 452
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