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CompTIA A+ certification is one of the most respected and sought-after credentials in the IT industry. It is designed to validate the skills and knowledge of entry-level IT professionals and serves as a benchmark for employers when hiring new IT staff. The CompTIA A+ certification is divided into two parts: Core 1 and Core 2. The CompTIA 220-1101 (CompTIA A+ Certification Exam: Core 1) Certification Exam is the first step in obtaining the A+ certification.
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CompTIA A+ Certification Exam: Core 1 (220-1101) is a globally recognized certification exam designed to validate the foundational skills and knowledge of IT professionals in the field of computer hardware, software, and networking. CompTIA A+ Certification Exam: Core 1 certification is the first step towards a promising career in the IT industry and is widely recognized by employers across the globe. CompTIA A+ Certification Exam: Core 1 Sample Questions (Q364-Q369):NEW QUESTION # 364
An administrator is replacing a cable that uses a DB9 connector. Which of the following cables is the administrator replacing?
A. Optical
B. Serial
C. USB
D. Parallel
Answer: B
Explanation:
A serial cable is a type of cable that can be used to connect devices that use serial communication, which is a method of sending data one bit at a time over a single wire. Serial cables are often used for console access to network devices, such as routers, switches, firewalls, or servers, when other methods of connection, such as SSH (Secure Shell), are not available or not working. A DB9 connector is a type of connector that has nine pins and is commonly used for serial cables. DB stands for D-subminiature, which is a family of connectors that have a D-shaped metal shield and different numbers of pins. DB9 connectors are also known as DE-9 connectors, as they belong to the E size category of D-subminiature connectors. DB9 connectors can support various serial standards, such as RS-232, RS-422, or RS-485.
NEW QUESTION # 365
Which of the following is a valid use for PaaS?
A. An application development environment
B. Off-site backups
C. A web application for asset management
D. A virtual server installation and configuration model
Answer: A
Explanation:
Application Development uses resources provide by Microsoft products already in place on a Platform (PAAS).
NEW QUESTION # 366
Which of the following services checks whether the sender's IP address is associated with the sender's domain name when receiving email?
A. DMARC
B. DKIM
C. MX
D. SPF
Answer: D
Explanation:
Explanation
The correct answer is C. SPF.
SPF stands for Sender Policy Framework, which is a protocol that allows domain owners to specify which IP addresses are authorized to send email on behalf of their domains1. SPF helps prevent email spoofing and phishing by verifying the sender's identity and preventing unauthorized use of their domain name12.
When an email is received, the receiving server checks the SPF record of the sender's domain, which is a DNS TXT record that lists the valid IP addresses for that domain12. The server then compares the sender's IP address with the SPF record and determines if it matches or not. If it matches, the email passes the SPF check and is accepted; if it does not match, the email fails the SPF check and is rejected or marked as spam12.
DKIM stands for DomainKeys Identified Mail, which is a protocol that allows domain owners to digitally sign their emails using a public-private key pair3. DKIM helps ensure the integrity and authenticity of email messages by verifying that they have not been tampered with or forged during transit3 .
MX stands for Mail Exchange, which is a type of DNS record that specifies the mail servers that are responsible for receiving email for a domain. MX records help direct incoming email to the correct destination and prioritize them based on preference values .
DMARC stands for Domain-based Message Authentication, Reporting and Conformance, which is a protocol that builds on SPF and DKIM and allows domain owners to define how receivers should handle unauthenticated or suspicious emails from their domains. DMARC helps protect domains from email fraud and abuse by providing feedback and reports on email delivery and authentication status .
Therefore, SPF is the only service among the options that checks whether the sender's IP address is associated with the sender's domain name when receiving email.
NEW QUESTION # 367
A technician needs to recommend an internet connection for a customer who travels around the world and wants to have connectivity while visiting remote camping locations. Some of the locations the customer visits have limited or unreliable cellular service. Which of the following connection types should the technician recommend?
A. Satellite
B. Fiber
C. Hotspot
D. DSL
Answer: A
Explanation:
The connection type that the technician should recommend is Satellite. Satellite internet is a good option for people who travel around the world and want to have connectivity while visiting remote camping locations. It works by using terminals which can give you internet access in remote locations as long as they have a line of sight to the satellite in orbit above12.
Since the customer travels to remote camping locations with limited or unreliable cellular service, the best recommendation is satellite internet connection. Satellite internet uses a dish to connect to satellites orbiting the earth, which can provide coverage anywhere in the world as long as there is a clear line of sight to the satellite. This is especially useful in remote areas where traditional terrestrial connections are not available.
References: CompTIA A+ Certification Exam Objectives - 220-1001: 1.6 Given a scenario, evaluate connection type and bandwidth.
NEW QUESTION # 368
Which of the following components houses the MX record?
A. DNSO B. VLAN
B. SMTP
C. DHCP
Answer: A
Explanation:
The domain name system (DNS) is the component that houses the MX record. The MX record is a type of DNS record that specifies which mail server is responsible for receiving email messages for a domain name.
VLAN is an acronym for virtual local area network, which is a logical subdivision of a network that allows devices to communicate as if they were on the same physical segment. DHCP is an acronym for dynamic host configuration protocol, which is a network protocol that assigns IP addresses and other configuration parameters to devices on a network automatically. SMTP is an acronym for simple mail transfer protocol, which is a network protocol that allows sending and receiving email messages over TCP/IP networks
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