Are the bumps kinda hard and squishy? If so they could possibly be either fat deposits or tumors. Its always best to get an expert approval so I recommend taking the dog to the vet just to be on the safe side.
Answer:
Note: CA here in the answer means Certificate Authority
Segmenting the role of the Root CA and Issuing CA to provide a secure configuration.
Keeping the Root CA offline, thus allowing the private key of the Root CA to be more secure.
Allowing multiple deployment of Issuing CAs at different geographical locations.
Greater control of Issuing CAs at different security levels.
Less management and implementation than a three-tier design.
Greater security than a single tier design.
More scalability for the security environment by deploying more Issuing CA.
Epithelial cells is the type of tissue that is designed to regulate temperature, secrete lubricants, and protect the body from harmful substances. Hope this helped! :)