CompTIA Updated 220-1101 Exam Questions and Answers by jadon

A spam gateway filters unsolicited emails at the server level, significantly reducing spam before it reaches user inboxes.

Why Not A (Load balancer): Load balancers distribute traffic but don’t filter spam.

Why Not C (Mail forwarding): Forwarding doesn’t filter spam.

Why Not D (Proxy servers): Proxies control web traffic, not email filtering.

CompTIA A+ Exam Reference: Core 2 (220-1102), Section 2.10, email security controls​.

An MX (Mail Exchange) record specifies the mail server responsible for receiving email for a domain.

Why Not A (CNAME): CNAME is used for domain aliasing, not for email delivery.

Why Not B (SRV): SRV records are used to locate specific services, not mail servers.

Why Not D (SOA): SOA records provide domain information but do not handle email.

CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.6, DNS record types​.

Port 21 is used by FTP (File Transfer Protocol) for file transfers. Port 53 is for DNS, port 68 is for DHCP, and port 389 is for LDAP. Understanding standard network ports is essential in CompTIA A+ Core 1 objectives, especially in networking and troubleshooting scenarios.

VGA (Video Graphics Array) cables transmit analog video signals only and do not carry audio signals. When a user connects a laptop to an audiovisual system using a VGA cable, the lack of audio is due to VGA's inability to transmit sound. Switching to an HDMI (High-Definition Multimedia Interface) cable, which supports both audio and video signals, will most likely resolve the issue by enabling the transmission of sound to the audiovisual system alongside the video.