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CYB 205 Infrastructure Administration
Q: Ann is a security professional for a midsize business and typically handles log analysis and security monitoring tasks for her organization. One of her roles is to monitor alerts originating from the organization’s intrusion detection system. The system typically generates several dozen alerts each day, and many of those alerts turn out to be false alarms after her investigation. This morning, the intrusion detection system gave an alert because the network began to receive an unusual high volume of the inbound traffic. Ann received this alert and began looking into the origin of the traffic. Ann continues her investigation and realizes that the traffic generating the alert is abnormally high volumes of inbound UDP traffic on port 53. What service typically uses this port?
A: DNS
Explanation: The Domain Name System (DNS) commonly uses port 53 for both TCP and UDP communications. DNS resolves domain names into IP addresses for network routing.Answer B is incorrect. Secure Shell (SSH) is used to manage network devices securely at the command level and uses TCP port 22.Answer C is incorrect. Secure Socket Layer (SSL) and Transport Layer Security (TLS) do not have ports assigned to them but are commonly used for Hypertext Transfer Protocol Secure (HTTPS) traffic on port 443.Answer D is incorrect. Unencrypted web traffic over the Hypertext Transfer Protocol (HTTP) often uses port 80.
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