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...Reason for ip addresses q i m still not super clear on the need think it s provide unique address each machine internet a yes to send packet regardless physics of hardware identify type network host or destination is no role in routing when sent across networks used carry all way does correct lan and mac takes care rest change gets last router sends with destinations ethernet header parts every has two part uniquely identifies universally why this done an scalability can be as subnet within organization classful addressing old figure kinds didn t have specify mask because you could out from exercise what class belong masks explain bit more indicates bits that are consecutive at left most shown n first which means e g c note only needed indicate...