RA (Registration Authority)

In a public key infrastructure (PKI), an entity that verifies the certifi-

cate authority (CA) prior to the issuance of a digital certificate to the requesting party. See also CA, digital certificate, and PKI.

• Carrier Access Code (CAC)
• carrier class
• carrier frequency
• carrier grade
• Carrier Identification Code (CIC)
• carrierless amplitude phase modulation (CAP)
• carrier sense multiple access/collision avoidance (CSMA/CA)
• carrier sense multiple access (CSMA)
• carrier sense multiple access with collision detection (CSMA/CD)
• carrier serving area (CSA)
• carrier system
• carrier system
• Carterfone Decision
• Carterfone Decision
• Cartesian coordinates
• Carty, John Joseph (1861–1932)
• CAS
• Cat 1 (Category 1)
• Cat 2 (Category 2)
• Cat 3 (Category 3)
• Cat 4 (Category 4)
• Cat 4 (Category 4)
• Cat 5 (Category 5)
• Cat 5 (Category 5)
• Cat 5e (Category 5 enhanced)