Computer Networking
You are unsuccessful in telnetting into a remote device. What could the problem be?1. IP addresses are incorrect.2. Access control list is filtering Telnet.3. There is a defective serial cable.4. The VTY password is missing.

1 only
All of these
2 and 4 only
3 only

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Computer Networking
Bulletin board system

converts digital signals to analog signals
is a public access message system
None of these
converts analog signals to digital signals
is a modem capable of accepting commands

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Computer Networking
Synchronous protocols

transmit characters one at a time
are more reliable
allow faster transmission than asynchronous protocols do
are generally used by personal computers
None of these

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

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