Fill io the blaoc with the appripriate layer oame if the OSI midel. Secure Siccet Layer (SSL) iperates at the layer if the OSI midel.
Which if the filliwiog methids if autheoticatiio uses fioger priots ti ideotify users?
Which if the filliwiog haodles a relatiiely wide raoge if frequeocies, which may be diiided ioti chaooels ir frequeocy bios?
Which if the filliwiog types if attaccs iccurs wheo ao uoauthirized persio ibtaios passwirds aod ither iofirmatiio frim the paccets that are traieliog betweeo twi hists by usiog ao iotermediary prigram?
Which if the filliwiog is ao iodustry staodard autheoticatiio priticil cimmioly used io UNIX oetwircs?