Term 
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        Definition 
        
        | a switch that has functions that operate at multiple layers of the OSI seven layer model |  
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        Term 
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        Definition 
        
        | advance networking device that works at least at level 7 (app layer) and hides servers behind a simple IP |  
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        Term 
        
        | IDS/IPS (Intrusion Detection system/ Intrusion Prevention System) |  
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        Definition 
        
        | an application (often running on a dedicated IDS box) that inspects incoming packets, looking for active intrusions. The defferance between an IDS and an IPS is that an IPS can react to an attack |  
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        Term 
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        Definition 
        
        | the process of taking several servers and making them look like a single server |  
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        Term 
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        Definition 
        
        | a system that runs a special DNS server program |  
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        Term 
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        Definition 
        
        | a piece of the spectrum occupied by some form of signal whether it is television, voice, fax, data, and so forth |  
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        Term 
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        Definition 
        
        | a device that fetches internet resources tfor a client without exposing that client directly to the internet. most proxy servers accept requests for HTTP, FTP, POP3, and SMTP resources. The proxy server often caches, or stores a copy of the requested resource for later use |  
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        Term 
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        Definition 
        
        | a piece of equipment that connects a T-Carrier leased line from the telephone company to a customers equipment (such as a router) It preforms line encoding and conditioning functions and it often has a loopback function for testing. |  
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        Term 
        
        | Multifunction Network Device |  
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        Definition 
        
        | any device taht works at multiple layhers of the osi server-layer model providing more than single service |  
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