Computer Networking
Computers in a LAN can be interconnected by radio and infrared technologies.

Multiplexer
Network Topologies
255.255.255.255
Wireless LANs
Modem

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Computer Networking
ICMP (Internet Control Message Protocol) is

a TCP/IP high level protocol for transferring files from one machine to another
a protocol used to monitor computers
a protocol that handles error and control messages
None of these
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address

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