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Question 1

(1)

Which of the following would an administrator use to migrate virtual machines from on premises to the cloud?

Question 2

(1)

A user, who is attempting to give a presentation via a projector in a conference room, reports the projector has video but no audio. Which of the following will MOST likely resolve the issue?

Question 3

(0)

Which of the following standards supports MIMO technology?

Question 4

(0)

A user requested upgrades to a company-Issued laptop to increase its performance while working with a large database stored on drive C. Which of the following tasks should a systems administrator co

Question 5

(0)

Which of the following technologies can allow multiple networks to traverse a switch?

Question 6

(0)

A company just bought a printer capable of automatically printing on both sides of the paper After installation, however, the technician can only print on both sides of the paper manually. Which of

Question 7

(0)

An online retailer would like to add capacity to support increased sales. Additional servers have been installed. Which of the following should be used to ensure each new server is being properly ut

Question 8

(0)

Which of the following utilizes TCP ports 20/21 and transfers data in cleartext?

Question 9

(0)

A customer is using a satellite internet connection that is experiencing slowness. A technician notices high latency while pinging, but the download test is performing perfectly with very good downl

Question 10

(0)

An organization maintains various record types, including health and criminal justice records. Which of the following cloud environments is the organization MOST likely to use to limit the attack su

Question 431 - 220-1101 discussion

Which of the following services checks whether the sender's IP address is associated with the sender's domain name when receiving email?

DKIM

SPF

DMARC

Suggested answer: C

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.

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asked 02/10/2024

PrzemysÅ‚aw Doczkal

39 questions

Your answer: A B C D

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