Cisco Basics
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1. Name 3 types of console connectors found on Cisco routers?
a. DB-25
e. RJ-11
b. DTE
f. XJ-8
c. DB-9
g. RJ-45
d. DB-15
h. DB-60
Answer: a,c,g
DB-25;
DB-9; RJ-45;
The RJ-45 is the most commonly found console port connector,
but some Cisco equipment does use female DB-25 & DB-9 serial connectors
2. What type of synchronous serial connector is typically found on a Cisco router?
a. DB-25
e. RJ-45
b. DB-60
f. RS-232
c. DB-15
g. RS-442
d. DB-9
Answer: b
3. Which pins are used for transmission with 10Base-T using an RJ-45 connector?
a. 1 and 3
e. 3 and 4
b. 2 and 6
f. 7 and 8
Answer: c
Pin 1 is Tx+
c. 1 and 2
g. 5 and 9
and
d. 3 and 6
Pin 2 is Tx-
4. Which cable end is needed when connecting the serial interface to a Cisco router from a Telco Service Provider's
CSU/DSU?
a. U
e. RJ-45
b. DCE
f. RS-232
c. DTE
g. S/T
d. DB-15
h. AUI
Answer: c
DTE; The Telco's CSU/DSU will almost always be providing the clocking signal which would make it
a DCE; therefore the end connected to the router will have to be a DTE
5. What: config-register setting configures the router to enter ROM Monitor mode?
a. 0x0
e. 0xF
b. 0x1
f. none of these
c. 0x2
d. 0x3
Answer: a
0x0 stored in the boot field of the configuration register will cause the router to enter ROM monitor mode upon reboot
6. What is the name for the 16-bit value that determines a router's boot procedure?
a. Command Register
d. Flash Register
b. Configuration Register
e. Boot Field
c. Boot Register
Answer: b
The configuration Register is a 16-bit register
7. Which configuration register setting will force the router to load an IOS image from the boot ROM upon reload
a. 0x2100
e. All the previous
Answer: b
b. 0x2101
c. 0x2102
f. None of these
d. x2142
The key value here is the that the first digit is a one: 0x2101 also seen frequently 0x0101
8. What configuration register setting is used on a router to force it to boot from flash but ignore its saved
configuration?
a. 0x2100
d. 0x2142
b. 0x2101
e. 0x210F
c. 0x2102
Answer: d
0x2142; the second digit must be a 4, which sets bit # 6 to ignore nvram
Cisco Basics QUESTIONS & ANSWERS
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9. What IOS command can be used to display the configuration register?
a. show config
d. show nvram
b. show register
e. show startup
c. show version
f. show running-config
Answer: c
10. How long does a user have to issue a break sequence upon restarting a router to enter ROM Monitor mode?
a. 10 seconds
e. 1 minute
Answer: e
b. 15 seconds
f. 30 seconds
c. 2 minutes
d. 90 seconds
60 seconds - 1 minute
11. What two commands can be used to change the configuration register on a Cisco IOS router?
a. register
d. config-register
b. set register
e. confreg
c. configure
Answer: d,e
The 2500 series routers and some others use the command: config-register. The 2600 series
routers and some others use the command: confreg.
12.
Which TWO of the following commands would set the bandwidth of Serial 0 to T1 speed
a. Router(config)#band width t1
b. Router(config-if)#bandwidth t1
c. Router(config)#bandwidth 1544k
d. Router(config-if)#bandwidth 1544
e. Router(config)#band width 1544000
f. Router(config-if)#bandwidth 1544000
g. Router(config-if)#bandwidth s0 1544000
h. You normally need to do nothing, the default bandwidth is already set to T1 speed
Answer: d,h
A key point to be aware of is that you must be on the interface configuration mode
13. What is the wide area networking acronym that describes the default router device type?
a. DCE
e. CPE
b. DXE
f. ATM
c. DTE
g. FRAD
d. CO
Answer: c
14. You do a show interface command and the status is:
Serial0 is up,
line protocol is down
Which THREE of the following statements may explain this message?
a. A physical problem exists on the interface
b. Both the local & remote interfaces are configured as DCE's
c. Neither the local nor remote interfaces are configured as a DCE
d. The local interface is in a shutdown interface mode
e. The remote interface has been administratively shut down
f. There is a problem with the physical cabling between the 2 routers
g. The frame type is incorrectly configured
h. The IP addresses on each end are not on the same logical network
i. You issued the show interface command from user mode not privileged mode
Answer: b,c,g
The last one about the IP addresses is wrong because that would be a layer 3 issue that
would be unknown at the layer 2 protocol level that the interface status reflects. Also if the remote interface is
administratively shut down; the local interface would be the same Serial0 is down; just as if there were no cable
connected between them. Also if the interface is bouncing back & forth between line protocol is up & line protocol is
down; this frequently indicates that ppp authentication has been configured but is not being correctly negotiated.
The last choice is also bogus because you cannot do a show interface command from user mode
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Cisco Basics QUESTIONS & ANSWERS
15. Which of the following commands would you use to set the clockrate on interface Serial 0 to 64 kbps?
a. Router(config)#clockrate 64
b. Router(config)#clockrate 64k
c. Router(config)#clock rate 64000
d. Router(config)#clock rate 64 k
e. Router(config-if)#clock rate 64000
f. Router(config-if)#clock rate 64
g. Router(config-if)#clockrate 64000
h. Router(config-if)#clock rate 64 k
Answer: e
16. What are TWO Rom Monitor mode commands to change the value of the Configuration Register?
a. configreg
e. config-register
b. o/r
f. show version
c. confreg
g. 0x0
d. o\r
Answer: b,c
'o/r' is used on the 2500 series routers and some others; 'confreg' is used on 2600 series routers and others.
Cisco Basics QUESTIONS & ANSWERS
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