CompTIA · A+ 220-1201
DNS, DHCP, VLANs, and VPNs
A+ 220-1201 · Lesson 7 of 22 · 44:52
YouTube loads only after you press play. This chapter opens at its timestamp in the full course. Watch on YouTube ↗
In this lesson
Prepare for the CompTIA A+ Core 1 (220-1201) exam. In this lesson: DNS records (A, AAAA, CNAME, MX, TXT), SPF, DKIM, and DMARC, DHCP scopes, leases, reservations, and exclusions, VLANs, and VPNs. Includes three original practice questions.
Preview the topics
- Brightwave’s appointment reminders land in spam, because a new email service now sends them, and it is not listed as an allowed sender for the domain. What should be updated?
- The receptionist’s printer gets a different IP address every few days, which breaks printing. What should be configured on the DHCP server?
- Guests in the waiting room use the clinic’s Wi-Fi, and they must not reach the clinic’s computers, without any extra cabling. What fits?