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NEW QUESTION # 187
A virtual machine has the following configuration:
*IPv4 address: 169.254.10.10
*Subnet mask: 255.255.0.0
The virtual machine can reach colocated systems but cannot reach external addresses on the Internet. Which of the following Is most likely the root cause?
Answer: A
Explanation:
* Understanding the 169.254.x.x Address:
* An IPv4 address in the range of 169.254.x.x is an Automatic Private IP Addressing (APIPA) address, assigned when a DHCP server is unavailable.
* DHCP Server Offline:
* APIPA Assignment: When a device cannot obtain an IP address from a DHCP server, it assigns itself an APIPA address to enable local network communication. This allows communication with other devices on the same local subnet but not with external networks.
* Resolution: Ensure the DHCP server is operational. Check for connectivity issues between the virtual machine and the DHCP server, and verify the DHCP server settings.
* Comparison with Other Options:
* The subnet mask is incorrect: The subnet mask 255.255.0.0 is appropriate for the 169.254.x.x range and does not prevent external access by itself.
* The IP address is an RFC1918 private address: RFC1918 addresses are private IP ranges (10.x.x.
x, 172.16.x.x-172.31.x.x, 192.168.x.x) but 169.254.x.x is not one of them.
* The DNS server is unreachable: While this could affect name resolution, it would not prevent the assignment of a non-APIPA address or local network communication.
* Troubleshooting Steps:
* Verify the DHCP server's status and connectivity.
* Restart the DHCP service if necessary.
* Renew the IP lease on the virtual machine using commands such as ipconfig /renew (Windows) or dhclient (Linux).
NEW QUESTION # 188
Which of the following places the most responsibility on the customer for a cloud-based environment?
Answer: D
Explanation:
Infrastructure as a Service provides the underlying compute, storage, and networking, leaving the customer responsible for managing operating systems, applications, and configurations, resulting in the greatest level of responsibility among the options.
NEW QUESTION # 189
A company's marketing team created a new application and would like to create a DNS record for newapplication.comptia.org that always resolves to the same address as www.comptia.org. Which of the following records should the administrator use?
Answer: D
Explanation:
A CNAME (Canonical Name) record is used in DNS to alias one domain name to another. This means that newapplication.comptia.org can be made to resolve to the same IP address aswww.comptia.orgby creating a CNAME record pointing newapplication.comptia.org towww.comptia.org. SOA (Start of Authority) is used for DNS zone information, MX (Mail Exchange) is for mail server records, and NS (Name Server) is for specifying authoritative DNS servers.
NEW QUESTION # 190
Which of the following would most likely be used as a replacement for a traditional VPN for remote users?
Answer: B
Explanation:
A modern replacement for traditional remote-access VPN for users is SASE (Secure Access Service Edge).
Network+ highlights trends in remote connectivity and security where organizations move away from backhauling all user traffic through a VPN concentrator and instead use cloud-delivered security and access controls closer to the user. SASE combines networking and security capabilities-commonly including ZTNA (Zero Trust Network Access), secure web gateway (SWG), CASB, firewall-as-a-service (FWaaS), and centralized policy enforcement-so remote users can securely access applications without relying on a classic "connect to the corporate network first" VPN model.
SD-WAN primarily optimizes connectivity between sites and to cloud services, often for branch networks; it' s not typically the direct replacement for remote user VPN access. Site-to-site VPN connects networks (locations) and is not intended for individual remote users. A reverse proxy can publish specific internal web applications externally and provide some security functions, but it does not replace VPN broadly for remote user access to multiple internal resources the way SASE/Zero Trust access solutions do. Therefore, SASE is the best answer as the likely replacement for traditional remote-access VPN.
NEW QUESTION # 191
Which of the following ports is used for secure email?
Answer: C
Explanation:
Port 587 is used for secure email submission. This port is designated for message submission by mail clients to mail servers using the SMTP protocol, typically with STARTTLS for encryption.
Port 25: Traditionally used for SMTP relay, but not secure and often blocked by ISPs for outgoing mail due to spam concerns.
Port 110: Used for POP3 (Post Office Protocol version 3), not typically secured.
Port 143: Used for IMAP (Internet Message Access Protocol), which can be secured with STARTTLS or SSL
/TLS.
Port 587: Specifically used for authenticated email submission (SMTP) with encryption, ensuring secure transmission of email from clients to servers.
Network References:
CompTIA Network+ N10-007 Official Certification Guide: Discusses email protocols and ports, including secure email transmission.
Cisco Networking Academy: Provides training on securing email communications and the use of appropriate ports.
Network+ Certification All-in-One Exam Guide: Explains email protocols, ports, and security considerations for email transmission.
NEW QUESTION # 192
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