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2. A look back: Key moments from the first months of COVID-19 - AOL

   www.aol.com/news/look-back-key-moments-first...

   A traveler wearing a mask is pictured as U.S. President Donald Trump speaks on a television screen at Seattle-Tacoma International Airport as he declares a national emergency over the coronavirus ...

3. There Was Also A Good Side To The Pandemic, Here Are 27 ... - AOL

   www.aol.com/apparently-pandemic-had-positive...

   Many people got COVID-19, and while some recovered without too many repercussions, others suffered for a long time (some still suffer) from long-term effects like fatigue, memory problems, trouble ...

4. Wildcard mask - Wikipedia

   en.wikipedia.org/wiki/Wildcard_mask

   A wildcard mask can be thought of as an inverted subnet mask. For example, a subnet mask of 255.255.255.0 (11111111.11111111.11111111.00000000 2) inverts to a wildcard mask of 0.0.0.255 (00000000.00000000.00000000.11111111 2). A wild card mask is a matching rule. [2] The rule for a wildcard mask is: 0 means that the equivalent bit must match

5. Illinois quick hits: Health system implements mask mandate - AOL

   www.aol.com/news/illinois-quick-hits-health...

   Officials cite an increase in respiratory illnesses like COVID-19, influenza and RSV as the reason. ... Health system implements mask mandate OSF Healthcare has announced a new masking requirement ...

6. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [88] NIOSH, on behalf of the Department of Health and Human Services , filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of ...

7. Subnet - Wikipedia

   en.wikipedia.org/wiki/Subnet

   The routing prefix of an address is identified by the subnet mask, written in the same form used for IP addresses. For example, the subnet mask for a routing prefix that is composed of the most-significant 24 bits of an IPv4 address is written as 255.255.255.0.

8. Dead family, lost friends: How the coronavirus changed one ...

   www.aol.com/news/dead-family-lost-friends...

   Joni Kerns, who owns the Quinter, Kansas, Dairy Queen, wears a mask while working at the restaurant. Kerns has COVID-19 for the sixth time.

9. Classless Inter-Domain Routing - Wikipedia

   en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

   A subnet mask is a bitmask that encodes the prefix length associated with an IPv4 address or network in quad-dotted notation: 32 bits, starting with a number of 1-bits equal to the prefix length, ending with 0-bits, and encoded in four-part dotted-decimal format: 255.255.255.0. A subnet mask encodes the same information as a prefix length but ...