troubleshooting Question

Can hosts on a 255.255.255.0 network communicate with hosts on a 255.255.255.252 network

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pclark6127 asked on
Networking ProtocolsNetwork ManagementNetwork Architecture
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I have a location that I need to expand the network at.  It's currently 10.13.2.0/255.255.255.0  This network is connected via MPLS and is using BGP.   I will be changing the router to reflect a new mask of 255.255.252.0 so that I can add additional IP to this network so the range will go from 10.13.0.1 - 10.12.3.255.

My question is will the hosts on the network with the 255.255.255.0 subnet still be able to talk till I'm able to change over the mask on them?    

This is something I've never had to do before.   Thanks....
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