Questions for the CCNA kiddies...

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If you are looking for practice questions for the CCNA here are a few I
wrote just now... some of them are probably deeply flawed, others probably
way beyond the CCNA level... still others probably have nothing to do with
networking...

ONE:
I have the following /24 network:

165.33.40.0

I want to set up one subnet with 57 hosts on it, eight subnets with 2 hosts
and 10 subnets with 9 hosts on them.

What are the masks and network addresses for each subnet.


TWO:
Match services with their TCP ports:
HTTP                            20
HTTPS                          25
Telnet                            443
SMTP                           119
NTP                               23
POP                               21
NNTP                            53
FTP                                80
FTP-Data                        110
DNS                                123

(bonus: which one of the above shouldn't be in that list)

THREE:
Match the following lists:
Physical                        segments
Data-Link                    packets
Network                      user data
Transport                    frames
Application                    bits

FOUR:

What are the MSBs that indicate which class a network address belongs?
00                            E
01                            C
10                            A
11                            B
111                           D

FIVE:
MAC addresses are to DLCIs as IP addresses are to:
ATM addresses
IPX addresses
NSAP addresses
ARP
IPv6 Addresses
(pick all that apply)

SIX: (speed round)
Which OSI layer do each of the following reside:
Frame-Relay
Ethernet
IP
Layer 3 Switch
ATM
ISDN
TCP
JPEG
NIC
FTP
NetBIOS
TFTP
An AUI to RJ-45 Transceiver
DNS
DIVX
RPC
CSU/DSU
Cat5 cabling
E-Mail
NTP
ARP
UDP
Managed Hub
ICMP
GBIC
Hubs
Switches
Routers
Internet Explorer

SEVEN:
When you type SHOW ISDN STATUS, what phrase are you looking for to indicate
you have good layer 2 communications with the ISDN switch?
Layer 1 Active
ESTABLISHED
await_establishment
terminal_down
TEI_ASSIGNED
MULTIPLE_FRAME_ESTABLISHED
spid1 valid & spid2 valid

EIGHT:
What is the usable range for administratively scoped multicast addresses:
Which one is all multicast addresses?
33.0.0.1 to 39.0.0.255
240.0.0.1 to 255.255.255.254
224.0.0.1 to 239.255.255.255
239.0.0.1 to 239.255.255.255

NINE:
Which of the following RIPv2 features did not exist in RIPv1
Update to multicast address
Classless
Broadcast updates
Neighbor Command
Classful
Hop Count of 16 is infinity

TEN:
Massive Bonus:
Given two routers.

A -- (FR Cloud) --- B

Router A has the following on a PVC to router B

INACTIVE

Router B has the following on a PVC to router A

DELETED

Where might the problem be on the network?
The F/R Cloud (but not edge switches)
The F/R Cloud including edge switches.
F/R Edge Switch on the A side misconfigured or down
F/R Edge Switch on the B side misconfigured or down
The local loop on the A side
The local loop on the B side
Configuration on the A side
Configuration on the B side
(Pick four)

ELEVEN:
Are you a cat or a dog person?
Cat
Dog
Hamster

TWELVE:
Is $1600 too much to pay for a T1-WIC card?
YES
NO, I own stock in Cisco.

THIRTEEN:
The following command under 'line con 0', 'NO LOGIN' has what effect?
No one will be able to login.
No password is required, and people will automatically be put into enable
mode.

FOURTEEN:
The following two commands are entered into a router:
Enable password cisco
Enable secret &341298HJKHSA3~!
Which password will be used to log you into enable mode?
Cisco
cisco
&341298HJKHSA3~!
No clue.
no password will be required as the two commands cancel each other out.

FIFTEEN:
If you have no internet connectivity when you first hook up your router,
whose fault is it, and who do you call first?
Your Telco, because everything is the telco's fault (if you have Verizon,
you are probably right (NOTE: I don't work for Verizon)).
Your IT person, because the router is probably misconfigured.
TAC.
Who cares, it is supposed to work, so it should be working, you call
everyone!
DLCIs matter? But I thought they were supposed to always be 16...
What do you mean I can't run an arc welder next to my SmartJack?
Seriously, it is always the telco's fault, because they are evil.

SIXTEEN:
Which configuration prompt will you need to be in to apply an ACL the VTY
(or CON) port?
C2610(config-line)#
C2610(config)#
C2610(config-if)#
C2610(config-ext-nacl)#

SEVENTEEN:
Match the command with what it does:
copy tftp run                                Copies running-config to a TFTP
server
copy tftp flash                            Copies IOS  from a TFTP server
copy flash tftp                            Copies startup-config to a
running-config
copy run star                            Copies running-config from a TFTP
server
copy star run                            Copies the IOS on flash to a TFTP
server
copy star tftp                                Copies running-config to
startup-config

EIGHTEEN:
Which of the following commands is the same as 'copy running-config
startup-config'?
Write Mem
Copy Run Star
C R S



A real quick note.

The Cisco certifications are driven by the Cisco TAC (Technical Assistance
Center)... when the managers at TAC see a massive influx of calls for a
specific issue, that issue goes right to the exams.

You want to know why you see so much ISDN on these tests? Because TAC gets a
crap-load of calls for ISDN (I used to think it was because Cisco got a
massive payment for every ISDN ckt sold...)

The CCIE lab is a little different, where Cisco instead is aiming their
sights at introducing new technologies... (which is why Dialer Watch was so
psychotically big last year on the lab)... But for the CCNP and CCNA exams,
the goal is to prevent as many TAC calls as possible... The thinking being
if the CCNAs can handle the minor grunt crap, TAC won't have to.

Hey, anyone else notice that TAC (not the initial screeners, but the guy who
calls you back) is not particularly well versed in the English language?
(I went from opening one TAC case a month to opening 30 a week... you would
be amazed at some of the bizarro error messages people get... and those
modemcaps are just bizarre to wade through)...




Jonathan



Re: Questions for the CCNA kiddies...
isn't DNS UDP not TCP?
Quoted text here. Click to load it



Re: Questions for the CCNA kiddies...
Actually, DNS uses both.  (IIRC, Later versions of) BIND can use port
53/TCP for zone transfers, etc.  However, 99.99% of your queries will be
using port 53/UDP since that is the way the system was designed to run
originally.  I'm not sure how Microsoft implements/doesn't implement
port 53/TCP for its DNS.

Reference: RFC 2181, Sec 4.2
http://www.apps.ietf.org/rfc/rfc2181.html#sec-4

Quote:
"4.2. Port Number Selection Replies to all queries must be directed to
the port from which they were sent. When queries are received via TCP
this is an inherent part of the transport protocol. For queries received
by UDP the server must take note of the source port and use that as the
destination port in the response. Replies should always be sent from the
port to which they were directed. Except in extraordinary circumstances,
this will be the well known port assigned for DNS queries [RFC1700]."

Chris G.



Larry Jones wrote:
Quoted text here. Click to load it

Re: Questions for the CCNA kiddies...
Larry Jones wrote:
Quoted text here. Click to load it

In almost all cases yes.  But systems can use tcp for DNS lookups.  DNS
lookups associated with LDAP for example may use tcp.  Zone transfers
may use tcp.  etc.etc.

--

hsb


"Somehow I imagined this experience would be more rewarding" Calvin
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