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In the lumber industry, abbr. for pattern.


As applied to a specimen of neat cement paste, a sample about 3 in. (7.6 cm) in diameter and ½ in. (1.3 cm) in thickness at the center and tapering to a thin edge; applied on a flat glass plate to determine the setting time.


(Port Address Translation) The most common way network address translation is implemented (see NAT). Also called "NAT overloading," "network address port translation" (NAPT) and "NAT/PAT."

PAT assigns a different TCP port number to each client session with a server on the Internet. When responses come back from that server, the source port number becomes the destination port number and determines which user to route the packets to. It also validates that the incoming packets were indeed requested. See NAT traversal, UDP hole punching, private IP address, RSIP and proxy server.

By using a different port number for each user, the NAT device knows which client PC to route the incoming packets to. See TCP/IP port.
References in periodicals archive ?
Consistent with the previous NAPT study, patients continue to be extremely satisfied with their proton therapy treatment:
The NAPT firewall with Stateful Packet Inspection (SPI), intrusion detection system (IDS) & Denial-of-Service (DoS) provides robust security from hackers.
Ninety nine percent of proton therapy patients believe they made the right choice, according to an NAPT survey released in February 2013.
The enterprise security processor also features packet filtering and flow processing, NAT, NAT-T, NAPT, IPSec and Secure Real-time Transport Protocol (SRTP) processing, as well as SHA-256, AES Galois Counter Mode (GCM), AES-XCBC-MAC-96, and Extended Sequence Numbers.
The NAPT and the Proton Therapy Consortium urge patients to ask their doctors to explain the risks, benefits and costs of all the appropriate treatments for their cancer.
The access solution combines the functions of the P-CSCF, A-BGF and the PDG to support NAPT, firewall management and hosted NAT traversal for access endpoints.