Threat actors are abusing the special-use ".arpa" domain and IPv6 reverse DNS in phishing campaigns that more easily evade ...

Abstract: The performance of Domain Name System (DNS) resolvers is crucial, as most of the communication on the Internet starts with a DNS lookup to resolve a domain of an IP address to reach the ...

The Cloudflare hiccup involved a sequencing change that confused some systems, and Cloudflare quickly walked it back, but the incident showcases enterprise network fragility in an uncomfortably ...

Devices in a number of Cisco switch types experienced significant reboot loops due to a pervasive firmware problem in the internal DNS client service. The DNSC (DNS Client) job was the source of the ...

A DNS Crash disrupted networks around the world on January 8, 2026, after a flaw in the DNS client service caused multiple Cisco Small Business Switches to reboot repeatedly and, in some cases, ...

Update: Cisco statement added at the end of the article. Multiple Cisco switch models are suddenly experiencing reboot loops after logging fatal DNS client errors, according to reports seen by ...

Abstract: Software-based IP route lookup is a key component for packet forwarding in Software Defined Networks. Running lookup algorithms on commodity CPUs is flexible and scalable, which shows ...

Have you ever found yourself wrestling with Excel formulas, wondering why your data retrieval isn’t working as expected? For years, Excel users have relied on VLOOKUP, a familiar and straightforward ...

In Q3 2025, Check Point Research recorded a record 85 active ransomware and extortion groups, the highest ever observed. What was once a concentrated market dominated by a few ransomware-as-a-service ...

If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...

The Master of Information Management and Systems (MIMS) program educates information professionals to provide leadership for an information-driven world. The Master of Information and Data Science ...