| Client | A machine, running a COBOL system, where you install communications client software. This machine accesses a host CICS environment via a local server. | 
 
			  
				| Data Link Control (DLC) link | The interface to the network. The attributes of a link can be divided into two parts:  
					 Characteristics of the port (logical and physical) 
					 Control characteristics of the link 
					  | 
 
			  
				| Control Point (CP, CP Name) | Identifies the local node manager that provides services to the local logical units. | 
 
			  
				| Link station | The part of data link control (DLC) that is responsible for the transfer of data between two communications services managers connected by a link. | 
 
			  
				| Local server | The machine with the SNA link to the host, where you install communications server software, to provide access to a COBOL System running on client PCs. | 
 
			  
				| Network name (NETID) | The name of the network to which the system is connected. | 
 
			  
				| Logical Unit (LU) | A network accessible unit (NAU). In SNA there are a number of logical unit types that identify the protocols supported by that logical unit. For APPC the LU type is 6.2 referred to as LU 6.2. | 
 
			  
				| Partner LU | The logical unit with which to communicate. | 
 
			  
				| Transaction Program (TP) | The program to be executed at one end of a conversation. | 
 
			  
				| Session | The logical connection between two network accessible units. | 
 
			  
				| Inter Systems Communications (ISC) | Two or more regions running on different processor complexes that are able to communicate with each other. | 
 
			  
				| Mode | The connection characteristics of a session. |