402 Chapter A: Answers to the "Do I Know This Already?" Quizzes and Q&A Sections
Answers to Chapter 4 "Do I Know This Already?" Quiz
1
What pins are used for modem control?
Pins 6, 8, and 20 are used for modem control.
2
What is the standard for DCE/DTE signaling?
The standard is EIA/TIA 232.
3
In character mode using reverse Telnet, what is the command to connect to the first async
port on a 2509 router that has a loopback interface of 192.168.1.1?
telnet 192.168.1.1 2001
4
What port range is reserved for accessing an individual port using binary mode?
The port range is 60006999.
5
If a four-port serial (A/S) module is in the second slot on a 3640 router, what are the line
numbers for each port?
The second slot would be slot 1 because the slots are counted 0, 1, 2, and then 3.
Therefore, the ports would be 33, 34, 35, and 36.
6
What is the AUX port line number on a 3620 series router?
The AUX port would be line 65.
7
What does the physical-line async command do and on what interfaces would you
apply it?
The physical-line async command places a serial (A/S) interface into asynchronous mode
so that it can be used for dialing. It would be used only on an A/S interface.
8
In what configuration mode must you be to configure the physical properties of an
asynchronous interface?
You must be in line configuration mode.
9
When should modem autoconfigure discovery be used? What happens when you use it?
modem autoconfigure discovery should be used only when you are physically not near
the modem and do not know what type it is. After autoconfigure learns the modem type,
the modem should be configured to reduce the CPU usage on the router.
10
Which of the following commands would you use to add an entry to a modemcap database
called newmodem?
a. edit modemcap newmodem
b. modemcap edit newmodem