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Computer Networking

Computer Networking
What is the first octet range for a class A IP address?

1 - 127
192 - 223
128 - 191
1 - 126
192 - 255

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Computer Networking
You telnet to a router and make your necessary changes; now you want to end the Telnet session. What command do you type in?

disconnect
close
disable
exit

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Computer Networking
Which of the following is the address of the router?

The TCP address
The default gateway
None of these
The subnet mask
The IP address

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Computer Networking
Which protocol is used to send a destination network unknown message back to originating hosts?

TCP
ICMP
ARP
BootP

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Computer Networking
What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down."

Data Link layer
Physical layer
Network layer
None. It is a router problem.

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Computer Networking
Which of the following device is used with an X.25 network to provide service to asynchronous terminals

bridges
repeater
gateway
None of these
Packet assembler/disassemble

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