Computer Networking
Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?1. Switch2. NIC3. Hub4. Repeater5. RJ45 transceiver

5 only
1 only
All of these
1 and 3
3 and 4

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Computer Networking
A front-end processor is

a processor in a large-scale computer that executes operating system instructions
a user computer system
None of these
preliminary processor of batch jobs.
a minicomputer that relieves main-frame computers at a computer centre of communications control functions

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