Often a LAN ends when there is a change in the communications medium.
Correct Answer:
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Q15: Routers are network transmission devices that connect
Q16: The simplest WAN is a dial-up modem
Q17: Frames typically operate at the Network layer
Q18: A(n)frame does not include routing information.
Q19: Encoding involves converting a frame or packet
Q21: A number of connected LANs in a
Q22: A WAN typically uses _ communications.
A)microwave
B)radio
C)fiber-optic
D)Both A
Q23: PCM sets the stage for _.
A)T-carriers
B)modems
C)PCs
D)ICs
Q24: The _ manages RFCs.
A)IEEE
B)FCC
C)IETF
D)ARPA
Q25: _ developed the first laser.
A)IBM
B)ARPA
C)MIT
D)Bell Labs
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