1) If the unit exchanged at the internet layer (layer 3) is called… 1) If the unit exchanged at the internet layer (layer 3) is called a packet and the unit exchanged at the network interface layer (layer 2) is called a frame, a.frames encapsulate packets b.packets encapsulate framesc.both a and bd.neither a nor b2) 5Which layer uses protocol ports in the header?a.Applicationb.Transportc.Internetd.Network Interface e.Physical3) What is the time for one level in a digital signal?a.frequencyb.periodc.baud rate d.baud intervalComputer ScienceEngineering & TechnologyNetworking IT 420
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